I'm not a bike guy. I don't know what brand my seat is. I think my gears are Shamano. (That's a brand, right?) I think that's how it's spelled. I'm not going to look it up. I saw it on the window of a bike shop once. I think that's what I have. I just use my bike to get around and to get my kids around. It's just a tool for me. That's pretty normal here in the Netherlands.

I've done some hacky repairs on bikes, not because I especially care about bikes but because I especially care about autonomy. I don't like being controlled. If someone can lock me in, control my ability to fix my main mode of transportation, they can control me. I use open source software for the same reason. My instinctive hatred of cops comes from a pretty similar place.

I'm not a bike guy. I'm an anarchist. That's where I'm coming from in this text. I'm not here for the bikes. I'm here for the liberation. And it is specifically to anarchists that I am speaking. If you happen to be a bike person and also an anarchist, great. You're not alone. I hope this lines up with your existing critique, or helps you fill out your critique, of car culture. If you happen to be a bike person and not an anarchist, well… I'm working from a set of assumptions you may not agree with but enjoy the ride. If you are an anarchist who does not already identify motosupremacy, the enforcement of the motorcar as a form of transit at the exclusion of all others, as an oppressive system and a structural component of the interlocking systems of oppression that we oppose, well, I have some words for you to read.

Why are we not “free” to own cars?

I'm inclined to just point at The Social Ideology of the Motorcar and walk away, but I won't. I will dump the first few sentences here before moving on though:

The worst thing about cars is that they are like castles or villas by the sea: luxury goods invented for the exclusive pleasure of a very rich minority, and which in conception and nature were never intended for the people. Unlike the vacuum cleaner, the radio, or the bicycle, which retain their use value when everyone has one, the car, like a villa by the sea, is only desirable and useful insofar as the masses don’t have one. That is how in both conception and original purpose the car is a luxury good. And the essence of luxury is that it cannot be democratized. If everyone can have luxury, no one gets any advantages from it.

Last time I started digitally yelling FUCK CARS into the void, in repose to some nonsense or other, someone called me a fascist for “imposing my beliefs on them.” I think that's worth talking about, because bullshit arguments like that carry way too much weight around here.

So let's change the frame for a bit.

Why not slaves? I mean, why don't I have the freedom to own other people? You fucking know why. If you don't, I do not understand why you're reading this. Anarchists oppose hierarchy. We oppose systems of oppression. We oppose coercive authority. You can't own a person without using coercion. So that's pretty much off the table. The same is true for the wage system, since it's also a system that relies on coercion. (Sorry, not sorry, capital “L” “Libertarians.”)

But that's easy. We all agree on that. (We fucking better all agree on that shit.) Of course, you can't own people. That's obviously fucked up. Let's move on to objects.

What about the means of production? Yeah, just kidding. (Anyone coming from the bikes, not the anarchy, is gonna be really confused right about now.) Let's try something else.

Why not private jets? Fuck now, because of climate change, right? Of course. But let's pretend it's possible to have non-polluting jets. There's still a geometry problem. Jets are big. Everyone having one takes up a lot of space. Even if we skip the whole “someone has to pilot it” and assume that everyone has a pilots license, even small jets are very large. OK, so not everyone is going to want to fly their own jet, but even if a significant portion of the population wanted one that's just a lot of physical space for jets. They also take a huge amount of maintenance. Small planes crash all the time. What about cleaning those crashes up? What about flying near cities? There are a lot of people who aren't near an airport. Do they get their own runway? How do all those people land? We would have to build a lot more airports, and have a whole lot more flight controllers. How do we maintain all of that infrastructure? What about the noise? There are so many problems.

That's kind of why flying cars are always promised on and never delivered. They're a terrible idea that could never work.

When you start thinking through the logistics, even a bit, it just couldn't work. The thing is, cars don't really work either. It is economically infeasible to build a society around cars. Ignoring climate change, ignoring all the people killed, ignoring all the other problems, it's just logistically impossible to sustain. That's why it's collapsing.

Roads are expensive to maintain. They are so expensive that they simply aren't maintained for poorer communities. When they are maintained, they are often maintained at the expense of other things, like clean drinking water. Cars need parking. Parking decreases density. Decreased density decreases the tax base, but it also pushes up the cost of maintaining utilities because you need more of them. It wouldn't matter if you were using taxes or community labor, Capitalist, Communist, or Anarchist, at a certain point there's just more work than resources or time and the system collapses. This is what's happening all over the US. This is what happened in Flint, and why their water was poisoned.

Cars, as the social ideology of the motorcar points out, are a luxury good. Their value comes from the fact that other people don't have them. If a few people have them, it's possible to get places really quickly. It's convenient to park. It's relatively safe (for the people inside). But as soon as enough people have them, the roads become clogged, and the solution is always “just one more lane.”

But it's not just that it doesn't work. It's not just that it's a luxury. It's that this freedom comes at the expense of others. Every car on the road makes it less safe for pedestrians and cyclists. All the resources spent on maintaining fragile car infrastructure are not spent on pedestrian areas, bikes, trains, trams, and metros. The “freedom” to use a car is massively subsidized by society, including by those who don't use cars, either because they don't want to or because they can't afford them.

Cars are one of the most heavily subsidized things there are. Parking places, roads and highways, bridges and overpasses, even fuel, are all paid for by national and local governments, out of the pockets of everyone (including non-drivers) to benefit drivers. Drivers whose existence on the road makes other forms of transportation unsafe. Any freedom that comes at the expense of someone else's freedom is just a from of oppression.

But there are also specific intersections between motosupremacy and other forms of oppression. Aside from that, there are other reasons to oppose cars, beyond what I've already outlined. Let's walk through them, in no particular order.

Cars are Ableist

Every damn time anyone says anything about cars, some motherfucking sea lion charges in and starts barking, “but what about disabled people!” Meanwhile, a bunch of people DM me and say, “yeah, I'm disabled, and I feel isolated/oppressed/generally bad about myself because I can't use a car.” By “disabled” these people invariably mean “people with limited mobility” and completely forget the entire rest of the range of people with visual limitations or cognitive differences that make it either illegal or inadvisable to drive. I, in fact, am one of them.

Like about 10% of the population, I have ADHD. Driving is both extremely dangerous and extremely boring. This is the worst possible type of activity for a person with ADHD. The only way I got through my years of driving was by blasting loud music constantly whenever I got in the car. I'm so glad everyone survived. Not everyone is as lucky as me. I'm also so glad I live in a country where I'm not forced to climb into a giant, people crushing, mobile surveillance units that require legal documentation to operate every time I get my partner oat milk.

But let's go back to those folks with mobility challenges.

When I lived in the rural US, I never really saw folks in wheelchairs. It was almost as though they didn't exist. But one day I was over at a guy's house, and he was in a wheelchair. The house wasn't really accessible. He talked about how he didn't really go out much. It wasn't until much later that I realized he couldn't afford one of the expensive specialized cars that people with his type of mobility limitations need to be able to drive. Instead, he had to rely on other people to get him around.

People with physical disabilities that make them unable to drive can be trapped in their homes in car dominated places like the US. Meanwhile, places that are less car dominated, like the Netherlands, have bike lanes. Mobility devices like electric wheelchairs and scooters can use those bike lanes.

Motonormitivity invisiblizes people with limited mobility, especially if they're poor and rural. It robs them of their independence by forcing them to use cars. Even if there are cars available for people with some disabilities, there are a lot of disabilities that just make driving too dangerous. In the US, people tend to not know that these people exist or how many are in their neighborhood. They do not know about these people, because car culture keeps them prisoners in their homes.

Cars are Ageist

It can be nice to think of “disability” as a thing that happens one day to other people, or as a thing other people are born with. But the thing about ability is that it comes and goes with age.

I remember my grandmother swerving all over the road, before her cataract surgery, before she lost her license for good and needed my mom to move in with her. Before she had to sell her house and move in with my aunt. She could have had so much more independence. At 95, she was still able to walk around and do most things for herself pretty well. She just couldn't drive safely.

They both could have had so much more independence.

Old people in the US often don't interact with society. They're hidden in homes. They're shuffled off to care facilities, where they can be safely isolated from the working population, the population who must not be reminded of their own mortality.

Here, in the Netherlands, where mobility devices can run in the bike lanes, elderly people can stay part of society for much longer. They aren't trapped waiting for someone to take them somewhere. Old people can just exist in the world. They can get older. They can look frail and still get around. There are still community living places for elderly people, sure, but they can remain independent for far longer then can be done in the US.

If you're lucky, perhaps, you will get old one day too. What will this be like for you? How will your society treat you? Will you be free to live and safe to move, or will you have to balance your autonomy against the danger that autonomy poses to others? Take a moment to imagine it. Go ahead. I'll wait.

Cars are Adultist

Of course, that ageism is on both sides. Children were some of the first victims of cars, many killed in the streets, as cars took the places they used to play. Americans who grew up in the 50s and 60s tell stories about running around their neighborhoods, freely, outside. But the cars they and their younger siblings bought slowly eroded that freedom for other kids.

I remember my mom getting me a bike. She had some fantasy about me riding around with the freedom she had as a kid. But I didn't, because I know I would have died. By the 90s it wasn't really safe to ride bikes in the US. If you wanted to go anywhere, you needed a car. Before I left the US, the giant trucks that flew down our street made it unsafe for my oldest kid to even cross the street. Adults can disappear in front of the hoods of American cars. Children, who can be so unpredictable, are impossible to see. Long straight streets allow American drivers to get their car moving far faster than their reactions allow them to safely control. Kids pay the price in their loss of independence.

Is it any wonder that Americans are maturing more slowly? Trapped in the house until they're 16, how are they supposed to learn the basics of independence that one can only get by experiencing it?

Cars steal childhood. They steal opportunities to grow. But today, they are stealing their future as well. Will my kids have a habitable world? Not if all these fuckers keep driving.

Cars are Patriarchal

And who is doing all this extra work of caring for young and old? Yeah, femme folks. Car infrastructure is designed to optimize driving to work, and driving home. In the historical suburban single-car home, this could leave women stranded, isolated and easier to control.

But in the modern world, women often have to drive as part of the invisible care taking work on which the economy rests. However, unlike the visible workplace, carework revolves around trip chaining. Pick up the kids, take them to football, go get some groceries, this is all more complicated when using roads built to optimize traffic between suburban and business centers.

In dense cities with bicycle infrastructure, everything becomes close. There are 2 grocery stores within a 5-minute bike ride of my house, there's a hardware store, a discount store, and another several grocery stores within 10 minutes. There are several public elementary schools within a couple minute bike ride. (Guess how many times I've waited in “the pickup line.”) I can tell you all this and not narrow down my location in the city one bit.

Bicycles are easier to park, so chained trips are much more efficient. But parents aren't required for everything their child does until that child turns 16, because kids can ride bikes. Children here start learning to ride bikes around 3 or 4 (sometimes younger). By 5, they can be fairly confident. By 6, some kids will ride with their parents to and from school. Packs of 9 and 10-year-old will ride with their hands in their pockets, talking loudly to each other. Kids of older parents don't come to pickup. Their kids bike home on their own. By 12, kids are expected to generally handle their own travel.

Americans are shocked and terrified by the idea, I'm sure. “But they could be kidnaped.” That's kind of a car thing. When cars dominate the world, there are fewer people walking and cycling. Streets are empty except for drivers. There are fewer eyes on the street. With fewer eyes, fewer people together, it becomes more dangerous for vulnerable people.

Who is disproportionately impacted by that? That's right! Femme folks.

The “Electric cars will save everything” crowd has been, I'm sure, unhappy to find that cars, not just internal combustion cars, are so problematic. “I thought it was just global warming!” Yeah, it wasn't. Not only that, but this is actually one area where EVs make things worse.

Electric cars need to be charged for long periods of time, leaving more vulnerable people trapped and isolated in predictable and low security locations. It would take a man to not see the problem here.

Cars are Racist

We've been talking about the US for so long, and we haven't talked about racism yet. America is like, made of racism. How can we not have talked about racism yet? It feels like something's wrong. But you know what, I have great news. The history of cars is, like the history of the US, racist as fuck!

Do you know who Robert Moses is? Go look up “Robert Moses racist” in your favorite search engine, and you'll find one of the most powerful urban planners in US history. Who happened to also, by no coincidence, a monstrous piece of shit.

He shaped New York from 1924 to 1975, and his Wikipedia page literally has a section that's just titled “racism” in which some of his words are described as “excruciatingly racist.” But he wasn't just a vaguely terrible person. He specifically used roads as a weapon to enforce segregation and attack diverse communities. He built low bridges to keep mass transit away from beaches he wanted to exclude black people from. He used red-lining maps to determine which areas to bulldoze for roads. In his most famous project, he displaced 40,000-60,000 people, bulldozing a line though the Bronx for the Cross Bronx Expressway.

I'm just gonna pull a quote really quick from a “Segregation by Design” article on this one:

Before the highway, the neighborhoods through which Moses would build the Cross Bronx were among the most racially integrated in the country, with large populations of Jewish immigrants from Eastern Europe, Irish and Italian Immigrants, (and after WWII) Puerto Ricans, and African-Americans (5). After the highway tore through, property values plummeted. White residents fled (lured to the suburbs by government-backed mortgages), while black and brown residents remained (oftentimes with few other options due to red-lining and racist housing policies). As covered in the documentary, Decade of Fire, subsequent disinvestment in services from the city led The Bronx to burn in the 70s and 80s, destroying roughly 80% of housing stock and displacing another 250,000 (6).

He wasn't just some isolated asshole. His design was a model for cities across the country. The freeways that destroyed the urban core not only displaced people, but destroyed the value of homes that weren't displaced. He was able to erase the generational wealth of black and brown people with his projects, and that model was replicated across the US. Today BIPOC folks are still more likely to be killed by cars and suffer from respiratory because of the roads built through their communities.

Racist road design still segregates white communities from communities of color. I remember a park in Tacoma that was bordered on two sides by roads and on the other by a predominantly white neighborhood. The historical red line ran on the other side of that road, still having a majority black and brown population. Though you can see the park from the formerly red-lined neighborhood, you are cut off from it by multiple lanes of high speed traffic.

When you start to notice details like this, you don't stop seeing them. That “Segregation by Design” web-site that I mentioned earlier calls itself an “An atlas of spatial injustice.” Last I looked, it covered 24 US cities and is filled with articles and pictures documenting the way neighborhoods were destroyed and red lined areas were segregated by highways.

And I'm not even talking about how cars legitimize cops randomly stopping people, and how that's a problem because cops just randomly murder black and brown folks sometimes. I'm not even gonna talk about how driver-less cars sometimes just can't see black people. There are so many problems.

Yeah, cars are just so fucking racist.

Cars are Classist

Racist urban design, like that designed and inspired by Robert Moses, destroys generational wealth. But once someone is poor, forcing them to own a car is a good way to keep them there.

When I was supporting a family of 4 on 40k per year, most of my anxiety came from cars. I remember the $900 Volvo my dad helped me buy and the broken speedometer that made it impossible to know if I was driving legally or not. Would they pull me over if I went too fast? Would they pull me over if I went too slow? Yes. I found someone to drive behind and tried to just keep speed with them. Every time I saw a cop, my pulse raced.

I was pulled over once because I worked the night shift. That was in a different car with a working speedometer, so I was sure everything I was doing had been legal. I was coming home from work around 2:30 in the morning because the newspaper I worked for printed at 2 am. The cop just pulled me over because I was out late. That's it.

Then there was a different time that a cop wanted to search my car because I was coming from a place with a county that was known for meth. That county was my home.

(I'm white. So when I got pulled over, sometimes for a minor infraction or another, I could usually talk my way out of it. Black and brown residents of the same town might not be so lucky.)

The cars I could afford were barely functional, or borrowed. So there was always the risk of something failing. It's not too uncommon for very cheap used cars to be sold without working speedometers, because sketchy used car lots disable them to keep the odometer from going up. But you buy what you can afford, and you can't always afford to be picky.

Sometimes you just have to buy a car with small enough problems that you think you can fix. I was lucky that I could throw a car on cinder blocks in front of my dad's house and work on it. Not everyone has that kind of luxury.

Labor takes time, tools cost money, both are cheaper than paying someone else to do the work. A cheap car can rapidly become far too expensive to maintain, leaving you stuck in a catch 22 of not enough money to fix the thing you need to make money.

We couldn't really afford to live anywhere near where I worked. Rural areas are cheap enough to afford housing, but you pay for it later in transportation costs. Wear and tear on a car, tires, gas, and times. I drove 3 hours total every day and worked for 8 or 9 hours every day. As rough as that sounds, I was working in IT. There are so many people who have had it so much worse than I ever did.

Every mile of winding road was dangerous, leaving and coming back during prime deer hours. Come too fast around a corner, don't pay enough attention, you're going to be paying for a new tail light or windshield to keep yourself legal.

The average total cost of ownership was $12,297 in 2024. (I'm just going to trust AAA on that, rather than launching into a rant about how they destroyed mass transit. The premise of Who Framed Roger Rabbit came from something real that actually happened. I'm just gonna leave that as homework.)

That money is just siphoned off. It goes into fuel (funding oil dictatorships and petro-fascists committing ecocide), tires, “depreciation” (like, the value just evaporates), and maintenance. The less money you have to start, the harder it can be to “buy smart,” “be strategic about your purchases,” and “retain value with regular maintenance.” People at or below the poverty line may not even be able to afford maintenance beyond the minimum required to keep going. License fees and maintenance to keep vehicles safe and legal are really optional, unless you get caught.

Cars can take the place of a modern company town. You work as hard as you can to afford the thing that gets you to work, always slipping just a little bit further into debt. The car becomes a tool to maintain class structure, to absorb any income that might lead to mobility, to make sure no worker can ever stock away enough money to say “no.”

Car prices keep going up and most Americans have car loans. Those loans can be as high as 25%. Cars may not even be paid off by the time they start to break down. Don't worry though, it's not like you could even “own” a car any more anyway. But I'm getting ahead of myself.

The average person would be much better off if they didn't have a car, if they instead had functional public transit or bike infrastructure that let them move safely through the world. They would be much better off if parking lots were removed and housing was built for them in the towns and cities in which they work. But there are people preventing that, and those people need cars.

Those people need cars to keep the workers from killing them. So they undermine mass transit with promises of “self-driving cars” and “hyperloops” that are never intended to actually be built. The only point of these projects is to maintain car infrastructure so the elites, who cause so much suffering, who would be stabbed on sight if they tried to use mass transit, can be driven around in their personal armored cars. They need cars because they actually do need to be surrounded by the bulletproof glass and armor plates they try to sell as “luxury.”

They are afraid, and their fear is justified. These are the worst people on Earth, billionaires who gorge on the profits of oil extraction and war (which, we'll also talk about later).

That pay wall that extracts wealth from the whole population, that keeps the poor constantly precarious, that continues to push what's left of the middle class towards the abyss, that exact pay wall directly funds global fascism.

Cars are fascist

Even as Putin's petro-dictatorship spreads right wing extremism through propaganda, subterfuge, and direct funding, fossil fuel companies pour money into far right candidates with the hope that they can save their business model from… from humanity saving itself… from them.

But it's hard to tell, in this moment, if fascism just meshes with the oil industry or if the modern fascist movement is a side effect of the oil industry. Let me explain a bit. Exxon modeled the current climate crisis, with a high degree of accuracy, as far back as 1977. They then spend the following years pouring money into making people not believe in science.

In order to save their business, a business that is literally ending the ecological epoch within which humans evolved, they created the reality bubbles that fascists latched on to and rode to power. The exact institutional doubt they elicited to protect their business, is the very same doubt that fascists need to control their victims.

But the connection isn't just through fuel. Your car, to work, to your car, to home. So many Americans go through this full cycle without actually interacting with anyone where they live. I had to really go out of my way to get to know by neighbors in the US, and plenty of them I literally saw once or twice over the course of years.

Americans interact with giant metal boxes (the other ones definitely full of idiots). The human mind cannot process human connection at the speed cars go, only risk and action. You can rarely feel anything but anger at these people, these careless drivers, because you have absolutely no connection to them. They are not people, but others.

Cars decrease the interactions people have, thus decreasing the variety of people that any given person knows. Atomization and isolation creates the perfect environment for fascist ideas to grow and spread. These idiots are everywhere, taking over. Driving is dangerous. Your body knows enough to register these threats, even if your conscious mind doesn't. Fear, anger, distrust, and isolation dominate the emotional landscape of motosupremacy. Car culture is fertile ground or a fascist message that leverages these feelings.

One could even say that motosupremacy creates the social preconditions for fascism.

But it runs even deeper, as this quote describes:

The very making of the automobile is notable, in a hierarchical production line predicated on maximum efficiency even if worker’s bodies are expected to perform iterative work that regresses their ability to think and be creative. Then in the very function of the car, there’s the performance of a high-speed society unafraid of violence for a higher cause with clear winners and losers as represented by different car brands. These aspects are unmistakably in lockstep with fascist mythology.

Editorial: Is the automobile fascist? – Haytham Nawaz

But it shouldn't actually be surprising that fascists and fossil fuels are intertwined. Fascism has always been intertwined with cars, since Mussolini coined the term. Yeah. Fascists fucking love cars.

Mussolini, like all the other fascists of his day, had a huge car collection. He dumped money into car racing, creating the Italian industry that ultimately produced the famous sports cars, such as Ferrari and lamborghini, that modern fascists covet today.

He also built the first road in Italy exclusively for cars, the Autostrada. This inspired the Nazi Reichsautobahn system. (The Reichsautobahn later went on to inspire the American highway system.)

Like Mussolini, Hitler's car collection is also well known. But Hitler didn't just want cars for himself. He wanted every (so-called “real”) German to drive a car (Jews, of course, were banned from driving). To put Germans in cars, Hitler and the Nazi party famously created Volkswagen.

Hitler admired one car manufacturer in particular: Henry Ford. Hitler actually kept a large portrait of Ford in his private office. Ford even shows up in Mein Kampf. Why? Ford was rabidly anit-semitic.

Ford used the wealth from his automotive company to buy up media companies. He then used these, combined with his image as an innovative industrialist, to spread anit-semitic conspiracy theories in the US. He published anti-semetic conspiracy hoax created in Russia to undermine labor organizing, The Protocols of the Elders of Zion, and an anti-semitic newspaper called the Dearborn Independent.

Truly, as it has been observed by others, Elon Musk is the Henry Ford our time.

And Trump, admiring both Mussolini and Hitler, also shares their obsession with collecting luxury cars.

Now, of course, being into cars doesn't necessarily make you a fascist. But it is probably worth taking a moment to notice how much fascists invest in spreading motosupremacy and how much motosupremacy benefits fascism. The fascist obsession with cars seems like more than just a coincidence, don't ya think?

Cars are hard to fix

Trump put out a memo on the “right to repair” cars. He may be fascist, but not wrong that the right to repair is important. The book Dawn of Everything identifies 3 fundamental forms of domination: violence, knowledge, and charisma. The ability to repair something lives at the intersection of the first two.

To repair something you need to have materials and tools. To repair cars you need spark plugs, ducts, tire balancing rigs, lifts, socket wrenches, timing lights, etc. Access to these objects is mediated through capitalism. Put another way, access is restricted to those with money at the threat of police violence. Fortunately, collective mechanic shops do exist. This allows some groups of people to reduce this barrier. Unfortunately, that runs into another barrier of the cost of a shared space.

For cars, shared spaces like this scale up well, but they don't scale down. If you have a bunch of mechanics sharing a shop it works. If you have one car, it's cheaper to just pay a mechanic to do the work than to have a shared space. This means there's simply a minimum cost/scale that you have to get over before your system becomes viable.

The situation is radically different with bicycles. Access to tools and parts is still controlled by state violence, but tools and parts are relatively small and cheap. You can share a bike easily. You can fix most things in a few hours, in a living room or on a sidewalk, using tools that won't even fill a backpack.

I've worked on cars, and I've worked on bikes, and the difference between the tools you need is an order of magnitude. To disassemble something like a VW bug, you can get away with a minimum of a floor jack, screwdrivers, a collection of crescent and socket wrenches, and a handful of other specialized tools. A fairly complete bike repair kit is smaller and cheaper than the floor jack alone. Parts, like a transmission or an engine block can cost more than an entire bike. Disposable car parts, like a set of tires, can cost more than a lot of bikes.

Now, I've hung out plenty of times in an O'Reilly or Autozone parking lot, cursing with a wrench and a friend. People do plenty of their own auto work. But there are a lot of barriers, there's a ceiling to what's possible, and basically everything is more expensive than bike repair.

And that ceiling has grown as engine compartments have become more packed with more expensive parts and more electronics have been integrated into the mix. This brings us to the other side of the intersection: knowledge. I'm not exactly talking about knowledge in the classical sense though. Sure, you probably need a Haynes manual for whatever car you're working on if you don't want to spend a bunch of time piecing things together from YouTube videos. But I'm talking about something else.

Modern cars, especially EVs, are filled with electronics. You have diagnostics interfaces, like OBDII, that that can give you information about what's happening, and you have control electronics, like your on-board computer, that make the whole system work. Manufacturers have realized that they can restrict access to diagnostic information and prevent repairs by using the same methods that printers and electronics manufacturers use. Like printer cartridges, parts may be “vendor locked” so that it's only possible to install parts from “authorized manufacturers” (who pay the car company for the right to make compatible parts). Even mechanics can be forced to pay for expensive licenses in order to use diagnostic software or install certain components.

Modern cars have “firmware” (special software) that can disable cars that are modified by “unauthorized” mechanics. It has even become standard practice for finance companies to have manufacturers disable cars for missed payments. Car computers have become much more advanced and connected to everything. Car computers, like other networked electronics, require regular updates to keep from being hacked (for the record, that's been a huge problem for a long time) or even just broken by accident. These updates, and even functionality like GPS, can be turned into a subscription service. We're not very far away from car owners paying a monthly service fee for the ability to start their car, and risking having their car permanently disabled if any one outside of an “authorized repair facility” opens the hood.

Cars are cops

So we have a computer, with GPS, connected to everything in the car. It can tell when you speed up, when you slow down, and what your physical location is at all times. Oh, right, and it's always connected to the manufacturer via an internal cellphone so it can be updated. What exactly stops them from recording your real time location at all times? Oh right, nothing. Sounds like an absolute privacy nightmare. Oh, I forgot, they're also covered with cameras.

Tesla is kind of known for this. They use car video to train the generative AI that is at the heart of Tesla's famous autonomous crashing system. (In the EU, this would absolutely be a violation of GDPR. I honestly don't think Tesla is complying with EU law, but, unfortunately, I'm not really able to investigate. I guess that's homework for another reader.) But when they're not using their video cameras to kill and maim people or drive into buildings, they're giving it to cops.

Cars, especially Teslas (because Elon Musk is a fascist) have become extensions of the modern surveillance state. Like Ring cameras, they become privately owned pieces of public surveillance infrastructure. Every car is now a cop, with 360 degree vision, constantly patrolling undercover.

These cameras are, of course, not all pointed out. Drivers regularly kill people. As I mentioned earlier, driving is both extremely dangerous and extremely boring. The only real way to combat the predictable distraction of driving would be by pointing cameras at the face of every driver and constantly monitoring them. This is just a basic safety issue, but it's impossible for it to not also be a privacy nightmare. Drivers should not be trusted, but neither should anyone with control over so many intrusive cameras.

But cars are not just surveillance platforms, they're also excuses to deploy other surveillance platforms. Surveillance platforms that happen to be incredibly insecure. Even if your car isn't tracking your every movement, “Safety cameras” are. The brutal American police state uses them to hunt down people who may be seeking abortions.

But cars have never really not been a privacy nightmare. In the US, no one is legally required to carry ID. (Now, I know there are a lot of caveats, but let's just pretend laws aren't “threats made by the dominant socioeconomic-ethnic group in a given nation.” Trust me, just roll with it for a bit.)

The moment you're driving, you are legally required to carry valid government ID. Police can pull anyone over, for any reason, and the very first thing they say is essentially, “Papers please.” It's so normal most people will do it without even thinking that they're acting out the trope that storytellers use to inform the audience that the story is set in a fascist police state.

And cars are just big. They're big enough that they can be tracked from the sky. Even before drones, helicopters could easily track cars. Most cars have to keep to specific paths. They can't just duck into the woods or into somebody's house. They can't cut down a narrow alley and disappear. Is it any wonder that Nazis took so many Dutch bikes?

Bikes were critical to anti-fascist resistance. They provided back channel communication for partisans. Women on bikes could easily smuggle pamphlets, guns, and bombs. Wanna put a bullet in some fascist occupier, Stasi informant, or some other villainous monster? Bikes are the tool if you want to mysteriously disappear into the night afterward like some kind of video game hero or something.

Bikes have been a tool of anti-imperialist and anti-fascist resistance for a long time. The Vietnamese logistics network was largely just a bunch of bicycle trails. Despite being massively out resourced, Vietnamese troops were able to supply their resistance and operate on a significantly lower supply budget. Vietnam threw out both French and American occupiers using bikes as their primary tool. Could they have done that if they'd relied primarily on cars? Of course not. Their supply lines would just get bombed.

The Ukrainian resistance to the Russian occupation has also used bicycles to carry out quick and quiet strikes. As the occupiers have run low on fuel, they've tried to do the same but have failed. Bicycles, it seems, lend themselves well to asymmetric resistance but poorly as a tool of occupation. When you understand the way guerilla warfare works, it makes sense.

It seems we've followed a tangent right into our next topic.

Cars are militarist

Since we're on the subject of war, let's talk about how cars make (offensive) war more likely.

Unlike bikes, which can literally be built in a garage, cars require huge manufacturing facilities and tons of steel. That manufacturing capacity can be, and has been, retooled to manufacture military hardware. It's common knowledge that Volkswagon made military vehicles for the Nazis.

A lot of people don't realize that things went the other way too. Messerschmitt and Heinkel, who made aircraft for the Luftwaffe during the war, went on to make a microcars after. A good chunk of military vehicle manufacturers, Axis and Allies, switched back to the civilian market after the war. Ford had made the B-52 bomber. Chevy made army trucks. Chrysler and GM built tanks.

Today, as the automakers face declining demand and external competition, they're looking again at military production. When you have all of this production capacity and a capitalist economy, there starts to be an economic incentive pushing towards war. War is extremely profitable, because things keep blowing up. If you make a bike, it can last 100 years. If you make a tank, it will be obsolete before it stops working. Missiles and bombs are expensive, and they blow up when they're used.

If you're in the weapons business, the longer you can keep a war going the more money you make. The demand is never satisfied.

This was one of Eisenhower's points when he warned about “the Military Industrial Complex.” Of course, during his term Eisenhower also built the largest piece of military infrastructure ever: the U.S. Interstate Highway System. It allowed rapid deployment of military hardware across the country. It was modeled after the Autobahn. It was this very military infrastructure that allowed the suburbs to be created, and that was used as a racist weapon to segregate and destroy vibrant diverse neighborhoods.

The highway system became a selling point for cars, which allowed something else interesting to happen.

The 1998 Gulf War was probably the first war where the critique of it being an oil war was popularly recognized. In fact it was quite explicitly over oil, as Iraq's stated reason for the invasion was Kuwait's accused over production violated OPEC production agreements. This alleged overproduction drove down the price of oil, which Iraq called “economic warfare.” Overproduction benefited the US, so the US intervened on Kuwait's behalf after the invasion. At the time, Americans broadly supported the war.

As the 2003 Iraq War became unpopular, people started to take the “oil war” accusations more seriously. (The decision by the 101 Airborne to name forward operating bases “Shell” and “Exxon” probably added to that.)

But US military policy has actually been primarily dictated by oil since WWI. Oil determined the outcome of that war, and oil would become the center of the military industrial complex.

Military strategy for all actors in WWII was dominated by oil, which only accelerated this strategy. Part of Hitler's fatal invasion of Russia was about sizing oil fields in the Caucuses. Japan targeted Perl Harbor to clear the way for its seizure of pacific oil resources. In the end, American oil production was one of the determining factors in the war.

Vietnam had its own oil fields, which US companies drilled during the war while the US bombed North Vietnamese oil wells. Other oil wars have become more obvious, but the role of oil in Vietnam is often overlooked.

US foreign policy isn't just wars. It's also assignations, coups, and weapons deals. All of these, especially in the Middle East, have revolved around oil. It's odd that people seem confused about the reason the US continues to fund Israel, even while they commit genocide. But how could the US afford to give up a strategic foothold in the region?

“Very interesting tangent,” I can hear you say, “but what was that interesting thing that happened when Americans bought cars?” Oh yes, that. Well, since US global power relies on oil, and cars rely on oil, Americans relying on cars aligns the interests of the military and the population: everyone wants cheap oil. Plenty of people knew full well that the Gulf War was over oil, and they didn't care. Hell, more than they didn't care. They agreed with that justification. They agreed, because they wanted cheap oil.

Cars are terrible for so many reasons, but I'm tired of writing.

I could go on about how cars are fundamentally elitist, how they were non-consensually forced on us (kind of like how AI is being forced on us now). I could talk about how cars make people easy to control by controlling oil. I could keep going, on and on, but we're like 8k words in, and I'm pretty tired. I bet you are too.

Cars are terrible. They're terrible for the environment. They're terrible for our relationships. They reinforce hierarchy. They're tools of control. They make us easy to control. They're inseparable from war.

Cars are a bad thing. But you know what's a good thing?

Bicycles are fine, actually

Bikes have been at the center of all sorts of resistance. They're a naturally social tool for moving through the world. You don't need stop lights or signs at an bicycle intersection. You look at each other. You communicate through subtle gestures. When you're cycling with people you're not just interacting with a bunch of machines, you're reading people.

Kids can bike. Old people can bike. Old people who can't ride regular bikes can ride modified bikes. People who can't ride modified bikes can use bike lanes with other mobility devices. The other day I saw a bike built specifically for moving wheelchairs. I didn't even know that was a thing.

I'm just gonna drop a quote here real quick:

“The bicycle is the most efficient machine ever created. Converting calories into gas, a bicycle gets the equivalent of three thousand miles per gallon.”

• Bill Strickland

But I think there's actually something else. The Netherlands is incredibly dense, and this is only possible because of bikes. It also has a lot of anarchist spaces, relative to its population. I think that this is partially because of the density. There are enough people around to do the work and support the spaces together. There's just a minimum density needed to support any given project. If anarchists are a portion of the population, you need a minimum density of people to reach that critical mass of anarchists.

Bikes enable that density, but they are also cheap and efficient transportation. Anarchists can work less and “anarchy” more if they aren't paying for a car. Each trip is short and fast, so there's more time to do stuff and the barrier is lower. You don't have to spend a bunch of time parking. You don't have to pay for gas. I think that bikes make anarchism more viable.

But I also think that bikes are, at least to some degree, prefigurative. Cars signify class in a way that bikes just don't. You're in a car, you're excluding everyone else with your display of wealth (or poverty). You're on a bike you're vulnerable like everyone else. On a bike, we're all in this together.

So I'm not a bike guy. I'm an anarchist. I just happen to be a bicycle anarchist. I hope by this point, you understand why because that's all the words I got for you to read.

Something's wrong with your plant. The leaves look off. You post a photo to a growing forum and within minutes, three people reply: “CalMag.”

You could have posted a picture of your dog and someone would have said CalMag.

It's the universal answer to every cannabis problem, the “have you tried turning it off and on again” of indoor growing. Yellowing? CalMag. Spots? CalMag. Weird leaf curl? Believe it or not, CalMag. And hey – sometimes it works. But when it doesn't, most growers just add more CalMag, which can make things actively worse.

Here's the thing nobody on the forums tells you: calcium and magnesium are two different nutrients that cause two different problems in two different places on the plant. Dumping a combined supplement at every symptom is like taking both Advil and Tylenol every time anything hurts – sometimes you need one, sometimes the other, and sometimes the extra dose of the wrong one creates a new problem.

This guide breaks down what calcium deficiency actually looks like versus magnesium deficiency, where to find each one on your plant, and how to stop guessing.

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Quick Identification

Calcium deficiency produces irregular brown spots and necrotic patches on newer, upper growth. Magnesium deficiency produces interveinal yellowing – green veins with yellow tissue between them – on older, lower leaves.

The single most useful diagnostic: location on the plant. Calcium can't move once the plant deposits it in cell walls, so when supply runs short, it's the newest growth that suffers first. Magnesium is mobile – the plant pulls it from old leaves to feed new ones, so the oldest leaves show damage first.

Lower leaves yellowing between the veins? Magnesium. Upper leaves developing brown dead spots? Calcium. Or Calcium = High, Magnesium = Low, if you want it super simple.

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Why They Get Confused

Blame the Bottle

The supplement industry packages calcium and magnesium together because both are secondary macronutrients that RO and filtered water strips out. As a preventive baseline, that's fine. As a diagnostic tool, it's useless.

When a grower sees something wrong and reaches for the CalMag, one of three things happens:

1. The plant needed magnesium. The CalMag contains magnesium, so it helps. The grower walks away thinking “CalMag works” without learning anything.
2. The plant needed calcium. Same thing.
3. The plant needed one but not the other. This is where it gets ugly. Calcium and magnesium are both cations that compete for the same uptake sites on roots. Adding an excess of the one your plant didn't need starts blocking the one it did.

That third scenario is why “I added CalMag and it got worse” is a meme for a reason. It's not that CalMag is bad – it's that using it as a diagnostic shortcut can create the exact antagonistic lockout you were trying to fix.

The Photo Problem

Both deficiencies can produce yellowing. Both can cause spots. A photo of a calcium-deficient upper leaf and a magnesium-deficient lower leaf can look surprisingly similar without context. And context – which part of the plant, which leaves, what pattern – is exactly what gets lost in a blurry photo posted at odd hours.

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Visual Symptoms: Side by Side

Calcium Deficiency

Shows up on new growth at the top of the plant – upper leaves, growing tips, youngest tissue.

What you'll see: – Irregular brown or tan spots that seem to appear overnight – The spots feel crispy and dead, not soft or yellow – New leaves coming in distorted, curled, or crinkled – Growing tips stunting or dying back – Stems developing weak, hollow sections in bad cases – Spots that don't follow any vein pattern – they just show up randomly

How it progresses: 1. Small brown spots appear on young leaves 2. Spots expand and merge into larger dead patches 3. Leaf edges curl inward and brown 4. Growing tips stunt or die 5. Stems weaken – the plant gets structurally fragile

The quick test: If you can crumble the affected tissue between your fingers, and the damage is on the top of the plant, calcium deficiency is your most likely suspect.

Magnesium Deficiency

Shows up on older growth at the bottom of the plant – lower leaves, middle canopy, the oldest tissue first.

What you'll see: – Yellowing between leaf veins while the veins themselves stay green (interveinal chlorosis) – Starts at the leaf edges and creeps inward toward the midrib – The classic “tiger stripe” pattern on fan leaves – Older leaves eventually going fully yellow, then brown, then dropping off – Veins staying distinctly green throughout – this is what separates it from nitrogen deficiency

How it progresses: 1. Lower leaf margins start yellowing 2. Yellowing spreads between veins, creating that green-vein / yellow-tissue contrast 3. Edges go brown and necrotic 4. Leaves curl upward slightly 5. Worst-hit leaves drop

The quick test: Green veins with yellow tissue between them, starting from the bottom of the plant. If the veins are yellowing too, that's nitrogen, not magnesium.

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The Comparison Table

Feature	Calcium Deficiency	Magnesium Deficiency
Affected leaves	New growth (top)	Old growth (bottom)
Mobility	Immobile – stays where deposited	Mobile – plant moves it to new growth
Primary symptom	Brown necrotic spots	Interveinal yellowing
Vein color	Veins unaffected	Veins stay green while tissue yellows
Spot texture	Crispy, dry, crumbles	Soft yellowing, papery when advanced
Pattern	Random irregular spots	Symmetric between veins
Edge symptoms	Curling, browning of new leaf edges	Browning of old leaf edges (late stage)
Progression direction	Top down	Bottom up
Stem effects	Weak, hollow stems possible	None
Speed of onset	Fast (days)	Gradual (1-2 weeks)

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What Else It Could Be

Calcium and magnesium each have their own lookalikes. Getting these wrong sends you down the wrong treatment path.

Calcium vs Potassium

Both produce brown, crispy leaf edges. Calcium does it on new growth with irregularly placed spots. Potassium does it on older leaves with a defined burned-edge pattern that starts at tips and margins and works inward. If the crispy edges are at the bottom of the plant, think potassium before calcium.

Magnesium vs Nitrogen

Both cause yellowing on older leaves. The tell is the veins. Magnesium keeps the veins green – the yellowing is only between them. Nitrogen yellows the entire leaf uniformly, veins and all. No interveinal pattern means nitrogen, not magnesium.

Magnesium vs Iron

Both cause interveinal chlorosis. Same pattern, opposite location. Magnesium hits old leaves at the bottom (mobile nutrient moving to new growth). Iron hits new leaves at the top (immobile nutrient that can't be redistributed). If the interveinal yellowing is at the top of the plant, it's iron. Bottom, magnesium. This one is actually definitive.

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Common Causes

Why Calcium Runs Low

Reverse osmosis or filtered water. Tap water naturally contains calcium. RO strips it. If you switched to RO without adding calcium back, this is probably your answer.

Low pH. Below pH 6.0 in soil, calcium is still physically present but chemically locked out. You can add all the calcium you want – the plant can't access it.

Excessive potassium or ammonium. Both compete with calcium for root uptake. Those high-K bloom feeds? They can induce calcium deficiency even when there's plenty of calcium in the medium.

High humidity. Calcium moves through the plant via transpiration. In very humid environments, transpiration slows, and calcium stops reaching the growing tips. This is the one that catches experienced growers off guard – everything else looks perfect but the new growth keeps getting spots.

Why Magnesium Runs Low

Coco coir. The single most common cause in modern indoor growing. Coco has a natural affinity for calcium and magnesium cations – it holds onto them rather than releasing them to roots. If you grow in coco and don't buffer for this, magnesium deficiency is basically guaranteed.

Too much calcium supplementation. Ironic, right? Excess calcium blocks magnesium at root exchange sites. The fix for one deficiency can cause the other. This antagonistic relationship is why “just add CalMag” is sometimes exactly the wrong move.

Low pH. Same as calcium – availability drops below pH 6.0.

Intense LED lighting. LEDs drive more photosynthesis per watt than HPS, and magnesium is the central atom in every chlorophyll molecule. More light means more chlorophyll demand means more magnesium consumption. Growers who switch from HPS to LED at the same feed rate often see magnesium deficiency appear within two to three weeks. It's not the lights causing the problem – they're just exposing a margin that was previously fine.

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Treatment

Fixing Calcium Deficiency

Check pH first. If your root zone is below 6.0, no amount of calcium will help – it's locked out. Correct to 6.0-6.5 (soil) or 5.8-6.0 (hydro/coco) before you add anything.

Use a calcium-specific supplement. Calcium nitrate provides calcium without adding magnesium. This matters when your magnesium levels are fine and you don't want to throw off the ratio.

Dolomite lime for soil. Slow-release calcium and magnesium. Better as a preventive amendment mixed in at planting than as a mid-grow rescue.

Look at competing cations. Running a heavy bloom feed with high potassium? The K might be the reason calcium can't get through. Temporarily dial it back.

New growth should improve within 5-7 days. The damaged leaves won't recover – don't wait for them to. Watch the new growth above the damage zone instead.

Fixing Magnesium Deficiency

Check pH first. Same story – lockout before deficiency.

Epsom salt. 1-2 teaspoons per gallon of water. Magnesium sulfate is the fastest targeted fix and it's cheap. Your plant doesn't care that it came from a $3 bag at the pharmacy.

Foliar spray for speed. 1 teaspoon Epsom salt per litre of water, sprayed directly on affected leaves. Foliar absorption bypasses whatever root problem is blocking uptake. Useful as a quick fix while you sort out the root zone.

Reduce calcium if you over-supplemented. If you've been heavy on CalMag or calcium nitrate, the excess calcium may be the reason magnesium can't get through. Sometimes the treatment is subtraction, not addition.

Foliar spray shows results in 3-5 days. Root-zone correction takes 7-10 days. Same as calcium – old leaves won't recover, but the damage should stop spreading and new growth should come in clean.

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Prevention

Test your water. Know your baseline calcium and magnesium before adding anything. Tap water in many regions provides enough of both. If you're on tap water and getting deficiency symptoms, the problem is almost certainly pH or antagonism, not supply.

Manage your pH. Root zone between 6.0-6.5 (soil) or 5.8-6.0 (hydro/coco). This single practice prevents more deficiencies than every supplement combined.

Match your medium. Coco growers need more CalMag than soil growers. LED growers need more magnesium than HPS growers. Generic feeding charts are written for average conditions – adjust for your actual setup.

Watch the ratio. Optimal Ca:Mg is 3:1 to 5:1. When this drifts – usually from over-supplementing one side – the other becomes deficient through antagonism, not absence. You can cause a deficiency by adding too much of the other nutrient. That's the cruel joke of cation chemistry.

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How AI Detection Works

This confusion between calcium and magnesium is a pattern recognition problem at its core. The symptoms are visually distinct – brown spots versus interveinal yellowing, top versus bottom – but at 2 AM, staring at a phone photo of a leaf under a blurple light, those distinctions get fuzzy. The human answer to “CalMag or not?” has always been “post a photo and hope someone experienced is online.”

PlantLab is built for exactly that call. When the model flags a nutrient issue it doesn't stop at a generic “nutrient deficiency” label – it names the specific deficiency, calcium and magnesium included, and attaches a calibrated confidence score so you know how sure it is. On the genuinely ambiguous shots – overlapping symptoms, bad lighting, the ones growers argue about in the comments – that confidence number is the honest part. A lower score is the model telling you to slow down and check pH, not a false guarantee.

One photo. A specific suspect with a confidence level attached – calcium or magnesium, not a reflexive “CalMag.” You still make the final call, but you start from the right suspect instead of the forum's favorite.

Try it free at plantlab.ai – three diagnoses per day, no credit card.

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FAQ

Can a plant have both calcium and magnesium deficiency at the same time?

Yes, and it's common with RO water or unbuffered coco. You'll see interveinal yellowing on lower leaves (magnesium) and brown spots on upper leaves (calcium) at the same time. This is the one scenario where reaching for the CalMag bottle is genuinely the right call. Confirm with pH testing first – if pH is the root cause, a single correction may fix both.

Is CalMag ever the right answer?

For prevention, absolutely. As a baseline addition to RO water or coco grows, CalMag works well. The problem is using it as a diagnostic reflex – adding it before you've figured out which nutrient is actually short. If only one is deficient, a targeted supplement avoids throwing off the ratio of the one that was fine.

Why do LED growers see more magnesium issues?

Magnesium is the central atom in chlorophyll. LEDs drive more photosynthesis per watt than HPS, which means more chlorophyll turnover, which means higher magnesium demand. Growers who switch to LEDs at the same feed rate they used under HPS often see magnesium deficiency show up within weeks. The plant was fine before because it wasn't photosynthesizing as hard.

How long before I see improvement after treatment?

Foliar magnesium spray: 3-5 days. Root-zone magnesium correction: 7-10 days. Calcium (new growth): 5-7 days. In every case, the old damaged leaves are done – they won't green back up. Watch the new growth above the damage.

Can pH lockout cause both deficiencies at once?

Yes. Both calcium and magnesium availability drops sharply below pH 6.0. A single pH correction can resolve what looks like a dual deficiency without adding any supplements at all. This is why “check pH first” appears in every treatment section above. It's boring advice, but it's boring because it works.

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Related Reading

• Potassium Deficiency in Cannabis – the third “burnt edges” mimic, and how its rust-flecked margins differ from calcium's random spotting
• Nitrogen Deficiency in Cannabis – the uniform bottom-leaf yellowing that magnesium's green-vein pattern gets mistaken for
• Nutrient Antagonism: When Feeding More Makes It Worse – the cation-competition chemistry behind “I added CalMag and it got worse”
• What's Wrong With My Cannabis Plant? – the full visual diagnosis guide covering every common deficiency

Nitrogen deficiency in cannabis appears as yellowing of lower, older leaves that progresses upward from the bottom of the plant. Because nitrogen is a mobile nutrient, the plant moves it from old growth to support new leaves. The key diagnostic marker is that yellowing includes the veins – unlike iron or magnesium deficiency where veins stay green.

Quick checklist:

• Yellowing starts on BOTTOM leaves
• Yellowing includes veins (not just between veins)
• New growth at top still green
• Leaves may cup upward before falling off

If yellowing appears on top/new growth first, it is NOT nitrogen deficiency.

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Why Nitrogen Matters

Nitrogen is the most abundant mineral in cannabis and essential for chlorophyll production. Without adequate nitrogen, photosynthesis suffers and growth slows dramatically.

Demand by growth stage:

• Vegetative: High demand (NPK ratio around 3:1:1)
• Flowering: Lower demand (NPK ratio around 1:3:2)

Late flower yellowing of lower leaves is often normal senescence, not deficiency. The plant redirects energy to buds.

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Visual Symptoms

Early Stage

• Pale or lime-colored lower leaves
• Subtle loss of deep green color
• Plant appears less vibrant overall

Moderate Stage

• Yellow spreads from lower to middle foliage
• Leaves may show brown spots at edges
• Leaves begin to cup upward

Severe Stage

• Entire leaves turn yellow including veins
• Leaves become brown and crispy
• Lower branches die back
• Severe growth stunting

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The Key Pattern: Bottom-Up

Mobile nutrients like nitrogen get pulled from old growth to support new growth. The plant sacrifices older leaves to keep young leaves alive.

Critical rule: If yellowing starts at the TOP, look for other causes:

• Iron deficiency (interveinal, new growth)
• Light burn (top canopy bleaching)
• Calcium or sulfur issues

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How to Distinguish From Similar Issues

Nitrogen vs. Magnesium: Both affect older leaves, but magnesium shows yellow between green veins. Nitrogen yellows everything including veins.

Nitrogen vs. Iron: Location is opposite. Iron affects NEW growth at top. Both can show yellowing, but iron keeps veins green.

Nitrogen vs. pH lockout: High pH can cause nitrogen lockout. Check your pH first (6.0-7.0 soil, 5.5-6.5 hydro).

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Nitrogen Toxicity: The Opposite Problem

Too much nitrogen causes “the claw” – leaves curve downward at tips with abnormally dark green, glossy appearance. Growth becomes stunted despite the dark color.

Fix by flushing with pH'd water and reducing feeding.

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Treatment

For deficiency:

1. Check pH first – lockout causes false deficiency

2. Add nitrogen source (grow nutrients, fish emulsion)

3. Start at ¼ strength, increase gradually

4. Monitor new growth – old leaves won't recover

For toxicity:

1. Flush medium with pH'd water

2. Reduce nitrogen in feeding schedule

3. Wait for new healthy growth

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How AI Detection Works

PlantLab's AI detects nitrogen issues by analyzing:

• Bottom-to-top color gradients
• Vein vs. interveinal coloration
• Leaf cupping direction
• Spatial distribution across canopy

Early detection catches issues when they're still fixable – within the first week of visible symptoms.

Try PlantLab free at plantlab.ai – 3 diagnoses per day.

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FAQ

Can yellow leaves turn green again? No. Once chlorophyll is gone, damaged leaves won't recover. But new growth will be healthy if you fix the issue.

How quickly does nitrogen deficiency spread? Without correction, you'll see progression from lower to middle leaves within 1-2 weeks.

My plant is in late flower and yellowing – is this deficiency? Probably not. Late flower yellowing of lower leaves is normal senescence. Only intervene if yellowing is rapid and reaches upper leaves.

What's the fastest fix? Foliar feeding provides fastest uptake (24-48 hours). Root feeding takes 3-7 days to show improvement.

Does nitrogen deficiency affect yield? Yes. Nitrogen-deficient plants produce smaller buds. Fix it early to minimize impact.

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Related Reading

• Calcium vs Magnesium Deficiency: A Visual Comparison – the other classic “CalMag” mix-up, and how the two look different on the plant
• Potassium Deficiency in Cannabis – burnt leaf edges and rust spots, another deficiency that shows up bottom-first
• Nutrient Antagonism: When Feeding More Makes It Worse – when a “nitrogen problem” is really a lockout caused by too much of something else
• What's Wrong With My Cannabis Plant? – the full visual diagnosis guide if you are not sure which deficiency you are looking at

The Short Version

Nutrient antagonism is when excess of one nutrient physically blocks another from being absorbed – your plant has enough of what it needs, it just can't get to it. Adding more of the blocked nutrient usually makes things worse. A 1953 agricultural chart called the Mulder's Chart maps all of these interference relationships; PlantLab's diagnosis now applies that same logic automatically, flagging the most likely excess nutrient in every analysis.

What this post covers: – Why “add more” is sometimes the exact wrong answer – The Mulder's Chart: what it shows and how to read it – The four antagonism traps cannabis growers hit most often – How to tell antagonism from a true deficiency – What to actually do once you've identified the likely excess

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You're three weeks into flower. New growth is showing interveinal chlorosis – yellowing between the veins. Classic iron deficiency. You've seen it before. You adjust your pH, add some chelated iron, wait a few days. Nothing. You add more. The leaves get worse. Two weeks of this and your runoff EC looks completely normal. What is going on?!

Here's the thing: your plant probably has plenty of iron. The problem is that something else is blocking it from getting in. You're chasing a deficiency that isn't really there.

That's nutrient antagonism – and it's the reason “add more nutes” is sometimes the exact wrong answer.

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Why Adding More Makes It Worse

Plant roots absorb nutrients as ions through specific transport proteins – essentially tiny gates in the root membrane, each specific to particular ions. The problem is that some ions are chemically similar enough to compete for the same gate.

Calcium (Ca²⁺) and magnesium (Mg²⁺) compete directly. Iron (Fe²⁺) and manganese (Mn²⁺) compete. Phosphate and zinc compete. When one is present in excess, it floods the available uptake pathways and crowds out the competition. The blocked nutrient can be sitting right there in your solution at perfectly normal levels – the plant just can't get it through.

Think of it like a packed venue with a capacity limit. Having more people waiting outside doesn't get anyone in if the wrong crowd already filled the room.

Your nutrient solution looks fine on paper. Your runoff TDS is normal. But the plant is effectively starved of the blocked nutrient. When you add more of the blocked nutrient, you're just adding more people to the outside line.

The fix is not to add more of the blocked nutrient – it's to reduce the excess that's doing the blocking.

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The Mulder's Chart: 70+ Years of This Being a Known Problem

In 1953, agricultural researcher Cornelis Mulder published an analysis of how essential plant nutrients interfere with each other. The interactions he mapped have been confirmed and refined by plant scientists ever since. Farmers and agronomists have used the resulting chart as a standard diagnostic tool for decades.

Most cannabis growers have never heard of it.

Here's the cannabis-relevant subset, derived from the interaction patterns that show up most in real-world growing:

If you have excess of...	It blocks uptake of...
Calcium	Boron, Iron, Magnesium, Manganese, Phosphorus, Potassium, Sulfur, Zinc
Phosphorus	Copper, Iron, Manganese, Zinc
Potassium	Boron, Calcium, Magnesium, Nitrogen, Phosphate
Nitrogen (toxicity only)*	Boron, Copper, Potassium
Zinc	Copper, Iron, Manganese
Iron	Manganese
Manganese	Iron

Calcium is the overachiever – it can block uptake of nearly everything else. This is also why CalMag can backfire when calcium is already the problem.

One important distinction about nitrogen: it's the most visually distinctive excess in this table. While every other entry can only be inferred from the deficiencies it creates, nitrogen toxicity has its own unmistakable signature – dark green, shiny leaves with tips curling downward, the “claw.” You can't look at a plant and spot phosphorus excess; you see iron and zinc and manganese deficiency appearing together, and you work backwards from that.

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The Four Traps Cannabis Growers Hit Most

The following are the scenarios you'll recognize from forum threads, grow journals, and that one grow that made you seriously question everything.

Trap 1: The Calcium-Magnesium See-Saw

Magnesium deficiency and calcium deficiency share visual overlap in early stages – interveinal chlorosis, lower leaves first. The forum answer is CalMag. CalMag works great when both calcium and magnesium are actually depleted. The problem: if calcium is already elevated (hard tap water, previous CalMag doses stacking, heavy base feed), adding more calcium deepens the antagonism against magnesium uptake. The magnesium deficiency gets worse, you add more CalMag, calcium climbs higher, and you're doing laps around the same problem.

The lesson isn't that CalMag is bad. It's that the same supplement that fixes a true Ca/Mg deficiency actively worsens a calcium-driven lockout.

Trap 2: The Phosphorus Stack

Late veg or early flower: you flush the plant, then hit it with a P-heavy bloom formula to push the transition. Phosphorus accumulates fast. Now iron, zinc, and manganese uptake are all suppressed simultaneously. Three separate deficiency symptoms appearing in the same growth period, on new leaves, none of them responding to treatment – that pattern almost always points to one excess, not three separate missing nutrients.

Trap 3: The Hard Water Baseline

Tap water at 200+ ppm calcium (common in many regions) puts you at or above the antagonism threshold before you've added a single ml of nutrients. Your nutrient line looks balanced on the label, but calcium is already dominating the root zone before the grow starts. By mid-flower, everything from magnesium to iron to zinc is struggling. Check your source water with a TDS meter before spending two weeks blaming your feeding schedule.

Trap 4: Soil Buildup

Amended soil and organic media are forgiving by design – but they accumulate phosphorus and potassium over time. By week 6 or 7 of flower, even a conservative feed is compounding on top of weeks of residual buildup. Micronutrient lockout becomes predictable. If your soil grows have historically gone sideways in late flower despite clean feeding, this is the first thing to look at.

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Antagonism or True Deficiency: How to Tell

If the problem is antagonism, adding more of the deficient nutrient won't fix it – and may accelerate the decline. Use these signals to read the situation:

Signs you're probably dealing with antagonism: – You already added the deficient nutrient and symptoms didn't improve or got worse (i.e. stop, just stop!) – The symptom pattern matches a known antagonism pair from the table above (i.e. hey, that's it) – Multiple micronutrient deficiencies appeared at the same time, not sequentially (i.e. why does this happen to me) – Runoff EC/TDS is elevated (i.e. I knew it!) – You've been stacking the same formula for several weeks without a flush or reset (i.e. it worked before, what gives?)

Signs it's probably a true deficiency: – Fresh grow, new medium, feeding hasn't been aggressive – Runoff EC is low – Single deficiency symptom, nothing else overlapping – Deficiency appeared early in the cycle when soil is still fresh

The diagnostic question to ask yourself: “I'm seeing [symptom]. What have I been feeding heavily that might be blocking this?” If the Mulder's table shows a plausible answer, that's your starting point.

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What to Do When You Suspect Antagonism

1. Stop adding the blocked nutrient. More iron won't fix iron lockout.
2. Identify the likely excess using the table above. What have you been stacking?
3. Reduce that input. In DWC, replace the reservoir and mix fresh at lower concentration. In coco, back off feed strength and let runoff EC drop. In soil, a water-only cycle at half strength is usually enough to start clearing it.
4. Let runoff EC normalize before resuming full feeding.
5. Reintroduce the blocked nutrient at a conservative dose once the excess has cleared.

Don't automatically reach for a full aggressive flush. Antagonism builds gradually and usually unwinds gradually too. You're correcting a balance issue, not nuking the root zone – unless the situation is severe, ease into it.

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How PlantLab Applies Mulder's Chart

PlantLab's /diagnose endpoint detects individual nutrient deficiencies from photos. When we built the nutrient subclassifier, the hardest cases weren't single deficiencies – they were patterns where three or four micronutrients were suppressed simultaneously. Those cases almost always had a single excess driving them, not three separate missing nutrients.

So we encoded the Mulder's Chart antagonism graph directly into the analysis layer. Every diagnosis now returns a mulders_hypotheses field: a ranked list of the most likely excess-nutrient candidates, inferred from the co-occurring deficiency pattern.

Here's what that looks like in practice. If the model detects iron deficiency + zinc deficiency + manganese deficiency in the same image:

{
  "mulders_hypotheses": [
    {
      "excess": "phosphorus_excess",
      "explains": ["iron_deficiency", "zinc_deficiency", "manganese_deficiency"],
      "evidence": 2.38,
      "evidence_count": 3
    },
    {
      "excess": "calcium_excess",
      "explains": ["iron_deficiency", "zinc_deficiency", "manganese_deficiency"],
      "evidence": 2.38,
      "evidence_count": 3
    },
    {
      "excess": "zinc_excess",
      "explains": ["iron_deficiency", "manganese_deficiency"],
      "evidence": 1.61,
      "evidence_count": 2
    }
  ]
}

Example reflects multi-label nutrient detection shipping in the next release.

The evidence score is the sum of confidence scores for each condition the excess would explain. Phosphorus and calcium both explain all three deficiencies equally in this example – both rank first. Zinc excess only explains two of the three, so it ranks lower.

This is a hypothesis, not a measurement. The model doesn't have access to your water report, feeding history, or what's in your soil. What it gives you is a starting point: here's which excess is most consistent with the visual pattern. For most growers, that's the hardest part of the diagnosis loop – not knowing which direction to even look.

For growers running API-driven automation – Home Assistant, Node-RED, custom controllers – the mulders_hypotheses field maps directly to an action: phosphorus_excess → reduce P in next feed. The diagnosis points you to the problem; your setup handles the correction.

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Limitations

This is inference, not measurement. A soil test or water analysis gives you actual numbers. mulders_hypotheses gives you ranked hypotheses based on what the plant looks like. Use it to direct your investigation, not replace it.

pH is a parallel problem. Deficiency symptoms caused by pH outside the optimal range look identical to antagonism symptoms. If your runoff pH is off, fix that first – the Mulder's table won't help you here.

Rare interactions have less training data. Copper deficiency is a newer addition to the model; detection confidence is lower than for iron or nitrogen. Treat copper-related hypotheses with more skepticism until more data accumulates.

Visual overlap is real. Late-stage symptoms, nitrogen toxicity masking other issues, and grow-stage-specific presentation can confuse any visual analysis. If a diagnosis doesn't match what you're seeing, trust your eyes and reach for a test kit.

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Related Reading

• Yellow Leaves, Seven Suspects: How PlantLab Got Specific About Nutrient Deficiencies – how the nutrient sub-classifier powering this was built
• Nitrogen Deficiency in Cannabis – the most common deficiency, and how to tell it apart from light deficiency and senescence
• Calcium vs Magnesium Deficiency: A Visual Comparison – the classic confusion pair, and why reaching for CalMag can deepen a lockout
• Potassium Deficiency: Burnt Edges and Rust Spots – the deficiency most often mistaken for nutrient burn, and how excess Ca/Mg locks it out
• What's Wrong With My Cannabis Plant? – the full visual diagnosis guide when the symptoms do not fit one clean cause

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Try PlantLab free at plantlab.ai. Create a free account and get 3 diagnoses per day — upload a photo and the diagnosis returns structured JSON: conditions detected, confidence scores, and the mulders_hypotheses field for any nutrient patterns that fit the antagonism graph.

Start Here

Something looks wrong. Maybe the bottom leaves are yellowing. Maybe the tips are curling. Maybe you walked into your tent and something just looked off in a way you can't articulate but your gut knows isn't right.

So you did what every grower does: you took a photo, posted it online, and got twelve different answers. Someone said CalMag. Someone said flush. Someone said “two more weeks.” None of them agreed on what the actual problem is.

This guide won't do that. It walks through a systematic process: look at where the damage is, what it looks like, and narrow it down to a specific cause. No guessing, no bro science, no “could be anything, hard to tell from the photo.”

Step 1: Where Are the Symptoms?

Look at where the damage is happening. Location tells you more than color does.

Symptom Location	Most Likely Causes
Bottom/older leaves first	Nitrogen deficiency, magnesium deficiency, potassium deficiency
Top/new growth first	Iron deficiency, calcium deficiency, light burn, heat stress
Entire plant	Overwatering, underwatering, pH lockout, root problems
Leaf surfaces (spots/patches)	Pests (spider mites, thrips), diseases (septoria, powdery mildew)
Buds/flowers	Bud rot, caterpillars, light burn
Stems/branches	Phosphorus deficiency, fusarium, root rot

Here's the rule that eliminates half the guesswork: mobile nutrients (nitrogen, magnesium, potassium, phosphorus) move from old leaves to new ones. When they run low, old growth sacrifices itself first. Immobile nutrients (iron, calcium) stay put – so deficiency shows up on new growth first.

Bottom-up damage? Mobile nutrient problem. Top-down damage? Immobile nutrient or environmental. That single distinction saves you from chasing the wrong diagnosis for a week.

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Step 2: What Do the Leaves Look Like?

Yellow Leaves

Ah, yellow leaves. The “check engine light” of cannabis growing. Universally alarming, completely nonspecific. Seven different things cause yellowing, and the forum advice for all of them is “probably CalMag.” The pattern of yellowing is what actually matters.

Yellow Pattern	Condition	How to Tell
Uniform yellowing, bottom leaves, veins included	Nitrogen deficiency	The whole leaf goes pale – veins too. Oldest leaves die first while new growth stays green. The classic.
Yellow between veins, bottom leaves, veins stay green	Magnesium deficiency	The leaf looks striped – green veins on yellow background. Often appears mid-to-late flower. This is the one where CalMag actually might be the answer.
Yellow between veins, top/new leaves, veins stay green	Iron deficiency	Identical pattern to magnesium, but on new growth instead of old. Easy to confuse the two if you're not paying attention to which leaves are affected.
Yellow leaf edges progressing inward	Potassium deficiency	Starts as yellow margins, turns brown and crispy. Sometimes mistaken for nute burn but the pattern is too consistent and progressive.
Yellow spots with brown centers	Calcium deficiency	Irregular brown/bronze splotches on newer growth in veg, but can appear on lower fan leaves during flower. Leaves may also twist or distort.
Uniform pale yellow, all over	pH lockout	Every nutrient is present in the soil. The plant just can't access any of it because pH is off. Fix pH first, wait 5 days, then reassess.
Yellow and drooping	Overwatering	The leaves feel heavy and waterlogged, not crispy and dry. The soil is still wet. You watered it because you were worried about it and now it's worse. We've all been there.

Bottom-up yellowing with veins turning yellow? That's nitrogen deficiency – the single most common issue for cannabis growers. See our complete nitrogen deficiency guide.

Yellow leaves but genuinely can't tell which deficiency? You're not alone – even experienced growers get these confused. PlantLab's AI was specifically trained to distinguish between 7 nutrient deficiencies that look nearly identical to the human eye. It's more reliable than asking strangers on Reddit, and faster than waiting three days for the wrong treatment to not work.

Brown Spots and Edges

Brown Pattern	Condition	How to Tell
Brown crispy edges, leaf margins	Potassium deficiency	Edges burn inward from the margins. Bottom leaves first. Often shows up in flower when K demand spikes.
Brown/bronze spots expanding over time	Calcium deficiency	Newer growth in veg, lower fan leaves in flower. Spots are irregular with browning edges, not perfectly round.
Brown spots with target-like pattern	Leaf septoria	Dark center ringed by lighter brown and a yellow halo – a bullseye pattern. Shape is roughly circular to irregular. Lower canopy in humid conditions.
Brown/gray mush inside buds	Bud rot (Botrytis)	The one that keeps growers up at night. Internal mold that starts inside your densest colas. By the time you see it on the outside, the inside is already gone.
Brown/rust colored bumps	Rust fungus	Raised bumps on leaf undersides, like tiny blisters. Often overlooked until it's widespread.

Curling Leaves

Curl Direction	Condition	How to Tell
Curling UP (taco-ing)	Heat stress, light stress	The plant is folding its leaves to reduce the surface area exposed to your too-close light. Top canopy affected most.
Curling DOWN (the claw)	Nitrogen toxicity	Dark green, glossy, tips hooking downward. The plant equivalent of drinking too much coffee. You overfed it.
Edges curling up	Potassium deficiency, heat	If the edges are also brown and crispy, it's K. If just curling, it's heat.
New growth twisted/distorted	Calcium deficiency	New leaves come in looking wrong – twisted, cupped, malformed. Not just curling, actually misshapen.

White or Discolored Patches

Appearance	Condition	How to Tell
White powdery coating	Powdery mildew	On fan leaves: wipes off with your finger, leaving clean green underneath. On sugar leaves near buds where trichomes are dense, the wipe test is unreliable – use a 10x loupe instead. PM looks flat and dusty; trichomes are three-dimensional with visible stalks and mushroom-shaped caps.

| White webbing between leaves | Spider mites | Fine webs between branches. Flip a leaf over – if you see tiny moving dots, you have a serious problem. | | Bleached/white tips | Light burn | Primarily on the top canopy, closest leaves to your light. Move the light up. | | Purple/red stems and undersides | Phosphorus deficiency, cold, or genetics | Three common causes: (1) genetics – many strains naturally run purple stems, (2) cold temperatures below 60F/15C trigger anthocyanin production independently of nutrition, (3) actual P deficiency, which also causes dark leaves, slow growth, and stiff/brittle foliage. If purple stems are the only symptom, it's almost certainly not phosphorus. |

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Step 3: Check for Pests

Pests leave evidence. Nutrient deficiencies create patterns. Knowing the difference matters – treating the wrong cause wastes time and can make things worse.

A jeweler's loupe is the single best diagnostic tool you can own. A 10x loupe ($8) catches most pests; a 60x pocket microscope ($15) is needed for broad mites and russet mites, which are invisible at lower magnification.

Pest	What You See	Where to Look
Spider mites	Fine webbing, tiny dots on leaves, stippling damage	Leaf undersides, near veins. By the time you see webs, the colony is already massive.

| Thrips | Silver/bronze streaks, tiny elongated insects | Upper leaf surfaces, inside new growth. The streaks are where they've been feeding. | | Aphids | Clusters of small bugs, sticky residue (honeydew) | Stems, new growth tips. They reproduce fast – a few today, hundreds next week. | | Broad mites / Russet mites | Twisted, distorted new growth; glossy or plastic-looking leaves; stunted tops | Invisible to the naked eye (need 60x+ magnification). Often misdiagnosed as heat stress, pH problems, or calcium deficiency. One of the most devastating cannabis pests because they're identified too late. | | Fungus gnats | Small flies near soil surface | Topsoil, especially in chronically overwatered pots. Adults are harmless; larvae feed on root hairs and create entry points for pathogens like Fusarium and Pythium. Dangerous for seedlings, less so for established plants unless the infestation is heavy. | | Whiteflies | Cloud of tiny white insects when plant is disturbed | Leaf undersides. Shake the plant gently – if a cloud of tiny white things takes off, you know. | | Caterpillars | Frass on/near buds, unexplained cola browning, holes in leaves | Inside buds, under leaves, along stems. Outdoor grows especially. The real threat is budworms boring into dense colas – the frass they leave behind promotes bud rot, which is often worse than the direct feeding damage. |

The key distinction: Pest damage is random and localized – wherever the pest fed. Nutrient deficiencies are systematic – they follow predictable patterns based on nutrient mobility. If the damage pattern doesn't make sense for any deficiency, get the loupe out.

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Step 4: Rule Out the Usual Suspects First

Before you diagnose a deficiency and start adjusting nutrients, check the three things that cause most of the problems most of the time. Boring advice, but it would prevent about 60% of the “what's wrong with my plant” posts on every growing forum.

pH (The Actual Answer to Most Problems)

Here's the uncomfortable truth: the majority of “deficiency” symptoms in cannabis are actually pH lockout. Every nutrient is sitting right there in the soil. The plant just can't absorb any of it because the pH is wrong.

Medium	Ideal pH Range
Soil	6.0 – 7.0
Coco coir	5.5 – 6.5
Hydro/DWC	5.5 – 6.0

Check your pH before you diagnose anything. If it's off, fix it, wait 3-5 days, then see if the symptoms are still progressing. This is less exciting than diagnosing a rare micronutrient deficiency, but it's correct far more often. “pH your water bro” is the one piece of forum advice that's right almost every time.

Watering (The Other Usual Suspect)

Symptom	Overwatering	Underwatering
Leaves	Drooping, heavy, plump	Drooping, dry, thin
Soil	Wet, slow to dry	Dry, pulling from pot edges
Recovery time	Slow (2-3 days)	Fast (hours after watering)
Pot weight	Heavy	Light

The “lift the pot” test is free and takes one second. If the pot is heavy, stop watering. If it's light, water it. More sophisticated than most diagnostic protocols, honestly.

New growers overwater because they're paying too much attention. The plant doesn't need water every day. If the soil is still moist 2 inches down, walk away. Watering your plant because you're anxious about it is the gardening equivalent of refreshing your email.

Light and Heat

• Light burn: Bleached/white leaf tips closest to light. Your light is too close. Move it up.
• Heat stress: Leaves taco upward, fox-tailing in flower. If your hand is uncomfortable at canopy height for 30 seconds, the plant is uncomfortable all day.
• Light deficiency: Stretching, thin stems, pale color. The plant is reaching for something that isn't there.

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The Cannabis Deficiency Quick-Reference Chart

For when you've checked pH, watering, and environment and the problem is still getting worse:

Nutrient	Mobile?	Where It Shows	Primary Symptom	Secondary Symptom
Nitrogen (N)	Yes	Old/bottom	Uniform yellowing	Leaves cup upward, fall off
Phosphorus (P)	Yes	Old/bottom	Dark leaves, slow growth	Purple stems (also genetics/cold)
Potassium (K)	Yes	Old/bottom	Brown crispy edges	Yellow margins
Calcium (Ca)	No	New/top (veg), lower leaves (flower)	Brown/bronze spots	Distorted new growth
Magnesium (Mg)	Yes	Old/bottom	Interveinal yellowing	Green veins on yellow leaf
Iron (Fe)	No	New/top	Interveinal yellowing	Same as Mg but on new leaves
Nitrogen tox.	-	All	Dark green, “the claw”	Tips hook down, glossy

The mobile/immobile rule is worth memorizing. It's the difference between diagnosing in 10 seconds and spending a week on GrowWeedEasy trying to match photos.

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When Eyeballing It Isn't Enough

Visual diagnosis works when symptoms are textbook. In reality, symptoms are rarely textbook. They're a blurry phone photo of a leaf under a purple blurple light, and three different conditions look identical at that resolution.

It breaks down especially when:

• Multiple problems overlap – spider mites AND potassium deficiency at the same time. Treat one, miss the other, wonder why the plant isn't recovering.
• Early symptoms are subtle – the difference between “early nitrogen deficiency” and “normal bottom leaf aging” is obvious in a textbook photo and invisible in your tent at 6 AM.
• Similar conditions need distinguishing – potassium vs magnesium deficiency requires comparing leaf position, vein color, edge pattern, and progression simultaneously. This is where “add CalMag and see what happens” comes from – it's not laziness, it's that telling the two apart with your eyes is genuinely hard.

PlantLab's AI was trained specifically on these ambiguities. It analyzes 31 cannabis conditions and can distinguish between 7 nutrient deficiencies that experienced growers regularly confuse. Not because it's smarter than a grower with 20 years of experience – but because it's been trained on 200,000+ images and doesn't get fooled by blurple lighting.

Try it free at plantlab.ai – 3 diagnoses per day, no credit card.

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FAQ

What is the most common cannabis plant problem? Nitrogen deficiency, by a wide margin. It's the most common real deficiency, and pH lockout causing symptoms that look like nitrogen deficiency is even more common. If you can only learn to identify one thing, learn what nitrogen deficiency looks like. Then learn to check your pH so you can rule out the fake version.

Why are my weed plant's leaves turning yellow? It depends. (Sorry. But it really does.) Start with where: bottom leaves = nitrogen, magnesium, or potassium. Top leaves = iron or calcium. Everywhere at once = pH lockout or root problems. The answer to “why are my leaves yellow” is always another question: “which leaves, and what does the yellowing pattern look like?” The table in Step 2 above will narrow it down.

How do I tell if my cannabis plant is overwatered or underwatered? Both cause drooping, which is unhelpful. The difference is in the leaves: overwatered leaves feel heavy, plump, and the soil is still wet. Underwatered leaves are papery thin and the plant perks up within hours of getting water. The pot-lift test works: heavy pot = too wet, light pot = too dry. Overwatering is far more common than underwatering, because new growers hover.

Can a cannabis plant have multiple problems at once? Frequently. Stressed plants attract pests, incorrect pH causes cascading lockouts across multiple nutrients, and a spider mite colony feasting on a plant that's already potassium-deficient produces a confusing mess of symptoms. Prioritize the most severe issue first. Fix that, stabilize, then address the next one. Trying to treat everything simultaneously usually means treating nothing effectively.

Should I remove yellow or damaged leaves? If a leaf is mostly brown and crispy, remove it – it's done photosynthesizing and it's just attracting pests. If it's partially yellow, leave it alone. It's still working. The plant will drop it when it's done with it. Never remove more than 20% of foliage at once, or you'll trade a nutrient deficiency for light stress from suddenly exposed lower growth.

What does it mean when my marijuana plant leaves curl up? Usually heat or light stress. The plant is doing what you'd do if someone held a heat lamp over your head – curling up to reduce its exposure. Move the light higher, improve airflow, or reduce intensity. If the curling comes with brown crispy edges, that's potassium deficiency instead. If the leaves are dark green and curling down (the claw), that's nitrogen toxicity – you overfed it.

How do I know if it's a nutrient deficiency or a pest problem? Deficiencies are systematic: they affect leaves in predictable order (old-to-new or new-to-old), create consistent patterns (interveinal, marginal, uniform), and progress gradually. Pest damage is chaotic: random holes, stippling in patches, silvery streaks where something was feeding, and actual visible bugs if you flip leaves over and look. When in doubt, get a 10x loupe and inspect the undersides. If nothing is moving and nothing is webbed, it's probably not pests.

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Detailed guides: – Nitrogen Deficiency: Complete Visual Guide – Calcium vs Magnesium Deficiency: A Visual Comparison – Potassium Deficiency: Burnt Edges and Rust Spots – How AI Diagnoses 31 Cannabis Conditions in 18ms – 7 Nutrient Deficiencies: How PlantLab Tells Them Apart – Nutrient Antagonism: When Adding More Makes It Worse – Why I Built PlantLab

You backed off the feed. The runoff numbers looked high, the tips looked crispy, so you did what every guide says to do when a plant looks overfed: you gave it less. A week later the leaf edges are worse – browner, drier, curling up like burnt paper.

That is the trap with potassium. The classic symptom, scorched leaf margins, looks exactly like the thing you would treat by feeding less. But a potassium-deficient plant is starving, not overfed, and cutting the feed pushes it further down.

This guide covers what potassium deficiency actually looks like on a cannabis plant, why it gets mistaken for nutrient burn and magnesium deficiency, and how to fix it without making the wrong move first.

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Quick Identification

Potassium deficiency in cannabis shows up first on the older, lower leaves as yellowing at the leaf edges that browns into dry, crispy margins – a “burnt edge” look – often with rust-colored brown spots scattered across the leaf. Because potassium is a mobile nutrient, the plant pulls it out of old growth to feed new growth, so the bottom of the plant suffers first while the top still looks healthy.

Quick checklist: – Damage starts on LOWER, older leaves – Leaf EDGES and tips scorch brown and dry before the center – Rust or bronze-colored spots freckle the leaf – New top growth still looks fine early on – Whole-plant growth slows and stems may weaken

If the burnt edges are on new top growth, or every leaf tip on the plant is burning at once right after a heavy feed, it is more likely nutrient burn than potassium deficiency.

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Why Potassium Matters

Potassium does not build tissue the way nitrogen does. It runs the plant's plumbing. It regulates how the stomata open and close, moves sugars from the leaves to the buds, controls water pressure inside the cells, and helps the plant hold up under heat and drought stress. During flowering, demand climbs because the plant is shipping energy into bud production.

When potassium runs short, the plant triages. It strips the mineral out of its oldest leaves and sends it to the newest growth and the flowers. That is why the damage marches from the bottom up, and why a plant can look fine at the canopy while the lower fan leaves crisp and die.

Common Triggers

Low potassium in the feed is only one cause, and often not the real one. More common culprits:

• pH out of range. Potassium uptake is best in the roughly 6.0 to 7.0 range in soil and 5.5 to 6.5 in hydro. Drift outside that and the plant cannot absorb the potassium that is already there.
• Nutrient lockout from salt buildup. Heavy feeding leaves salts in the medium that block uptake. Ironic, but overfeeding can cause a deficiency.
• Cation competition. Too much calcium, magnesium, or sodium competes with potassium at the root and crowds it out.
• Cold root zone or overwatering. Both slow root function and reduce how much potassium the plant can pull in.

The takeaway: reach for a pH pen before you reach for a potassium supplement. A lockout looks identical to a shortage on the leaf, and dumping more potassium into a locked-out plant only adds to the salt problem.

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Visual Symptoms by Stage

Early Signs

• Faint yellowing along the edges of lower fan leaves
• The very tips of some lower leaves start to look dry or singed
• Growth is a little slower than you would expect, though nothing dramatic yet

At this stage it is easy to miss or to write off as light stress or general aging.

Moderate Symptoms

• Leaf margins turn brown and crispy while the center of the leaf stays greener
• Rust-colored or bronze spots appear between the veins and toward the edges
• Edges curl upward and the leaf feels dry and papery
• The damage is clearly worse on the lower half of the plant

Severe / Advanced

• Whole lower leaves brown, curl, and die back
• Rust spotting spreads and merges into dead patches
• Stems weaken and the plant loses vigor
• In flower, bud development stalls and yields take a real hit

Potassium deficiency in late flower is especially costly because that is exactly when the plant needs potassium to fill out buds.

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How to Distinguish From Similar Issues

Three problems get confused with potassium deficiency because they all involve burning or spotting. The differences are in the location and the pattern.

Symptom	Potassium deficiency	Nutrient burn	Magnesium deficiency
Where on plant	Lower, older leaves	Often new/top growth first	Lower, older leaves
Where on leaf	Edges and tips scorch, rust spots	Leaf tips only, then edges	Between the veins, spreading in
Color pattern	Yellow edges to brown crisp + rust flecks	Bright brown/yellow tip burn	Yellow between green veins
Veins	Can stay green early	Green	Stay distinctly green
Recent cause	Slowing growth, high salts, pH drift	Just fed heavy, high runoff EC	RO water, cal-mag stripped out
The tell	Rust spots + edge scorch on old leaves	Symmetrical tip burn after a strong feed	Clean interveinal yellowing, no rust

The single most useful distinction: nutrient burn starts at the leaf tips and is tied to a heavy feed; potassium deficiency scorches the whole margin of older leaves and comes with rust-colored spotting. And where magnesium deficiency leaves clean yellow tissue between green veins, potassium adds that bronze, freckled, burnt-edge character on top.

This mimic problem is exactly why a wide-angle photo and a gut call so often go wrong. A burnt lower leaf could be three different problems, and the right fix for one makes another worse.

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Treatment and Prevention

Immediate Steps

1. Check pH first. Test your runoff or reservoir. If it is out of range, correct it before touching the feed. This alone resolves a large share of “deficiencies” that are really lockouts.
2. Flush if salts are high. If runoff EC is high, flush the medium with pH-corrected water to clear the buildup, then resume feeding at a moderate strength.
3. Supply potassium in a balanced form. Once pH and salts are sorted, feed a bloom-oriented nutrient with adequate potassium. Do not mega-dose – excess potassium blocks calcium and magnesium.
4. Leave the damaged leaves. Scorched tissue will not heal. Watch the new lower growth to confirm the problem has stopped spreading.

Long-term Prevention

• Keep pH in the target band consistently – most potassium problems are uptake problems, not supply problems
• Match feed strength to the plant's stage; flowering needs more potassium than veg
• Avoid over-supplementing calcium and magnesium, which compete with potassium
• Watch the lower canopy – it is your early warning system for every mobile-nutrient issue

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How AI Detection Helps

The hard part of potassium deficiency is not treating it. It is catching it early and correctly, before you make the nutrient-burn mistake and starve the plant further.

PlantLab is built for that first read. You photograph the plant, and the model screens plant health and flags the pattern it sees – so a scorched lower leaf gets read as a specific deficiency signal rather than a vague “something's off.” The health screen runs at 98.4% balanced accuracy on held-out images, and cannabis verification at 99.96%, in about 18 milliseconds per image. With multi-plant support, a wide tent shot returns one read per plant instead of a single averaged guess, which matters when one plant is starving and the one beside it is fine.

It is a second opinion that does not default to “CalMag.” You still make the call and check the pH – the model just points you at the right suspect faster.

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FAQ

What does potassium deficiency look like in cannabis? It shows up on the older, lower leaves as yellowing at the edges that browns into crispy, scorched margins, usually with rust-colored or bronze spots scattered across the leaf. New top growth stays healthy early because the plant moves potassium to where it needs it most.

How do I tell potassium deficiency from nutrient burn? Nutrient burn starts at the leaf tips, hits new growth too, and follows a heavy feed. Potassium deficiency scorches the whole margin of older, lower leaves and comes with rust-colored spotting. If you just fed strong and the tips are burning symmetrically, suspect burn; if lower leaves are freckling and edge-scorching over time, suspect potassium.

Is it potassium or magnesium deficiency? Both hit older leaves, but magnesium leaves clean yellowing between green veins with no burnt edges, while potassium adds bronze rust spots and scorched margins. Magnesium is the cleaner interveinal look; potassium is the burnt, freckled one.

Can overfeeding cause potassium deficiency? Yes, indirectly. Heavy feeding leaves salts in the medium that lock out uptake, and excess calcium or magnesium competes with potassium at the root. The leaf reads as a shortage even when there is plenty of potassium present, which is why you check pH and runoff before adding more.

Will damaged leaves recover? No. Scorched and spotted tissue will not turn green again. Fix the cause and judge success by whether the newer lower leaves stop developing the same symptoms.

Related Reading

• Calcium vs Magnesium Deficiency: A Visual Comparison – the other pair that scorches and yellows older leaves, and how to tell all three apart
• Nitrogen Deficiency in Cannabis – the most common bottom-up mobile-nutrient deficiency
• Nutrient Antagonism: When Feeding More Makes It Worse – why excess calcium or magnesium locks out the potassium your plant needs
• What's Wrong With My Cannabis Plant? – the full visual diagnosis guide if you are not sure which problem you are looking at

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Growing something and not sure what you are looking at? Get a read in seconds at plantlab.ai.

Freies Wochenende – 11.–12. Juli

Da unser Team Ferien hat, habe ich mich auch entschieden, ein bisschen weniger zu schreiben und mich stattdessen zu erholen. Sprachlich war ich nur damit beschäftigt, meine Duolingo-Übungen zu machen und manchmal noch etwas zu schreiben. Das ganze Wochenende hatte ich gute Erholung, viel Schlaf und Zeit mit meinen Hündchen, die mich in der letzten Woche etwas seltener gesehen haben.

Das Wetter war ganz schön. Schon wieder heißer, aber immer noch erträglich. Die schlechte Seite war, dass ich mehr tagsüber geschlafen habe und deswegen nachts länger wach geblieben bin.

An diesem freien Wochenende besuchten wir auch einige Bars und Restaurants in unserer Nachbarschaft. Wir wohnen hier in Lichtenberg, und mir gefällt dieser Bezirk. Berlin ist insgesamt ganz grün, aber hier spüren wir das noch mehr. Wir haben den Tierpark in der Nähe, ein paar schöne ruhige Straßen und Wege zwischen den Häusern und noch eine bestimmte Ecke mit Cafés, Döner-Imbissen, Bäckereien, Läden und anderen wichtigen Zentren des Lebens. Fast alles haben wir schon besucht und können zusammenfassen, dass man hier ganz unterschiedliches Essen finden kann. Ich würde auch sagen, dass die Preise ganz ähnlich wie in Vilnius sind und wir keinen großen Unterschied spüren.

Trotzdem berichte ich hier ein paar Anmerkungen zum Thema Essen in meiner Nachbarschaft:

1. Der Unterschied zwischen Dürüm und Döner? Das ist mir immer noch nicht ganz klar. Diese türkischen oder arabischen Imbisse mit Döner, Dönerboxen und Döner auf dem Teller gehören zu unseren beliebtesten Essensorten. Natürlich kann man nicht sagen, dass sie besonders günstig sind, aber hier findet man ein gutes Gleichgewicht zwischen Preis, Menge und Geschwindigkeit der Zubereitung. Außerdem gibt es meistens mehr als eine vegetarische Option, und wir verstehen uns inzwischen sehr gut mit den Jungs in unserem Imbiss im Bezirk. Eine Halloumi-Box mit Pommes und Salat ist hier meine Lieblingsoption, wenn ich etwas Schnelles und Preiswertes möchte.

2. Mit vietnamesischen oder chinesischen Restaurants habe ich eine etwas vorsichtigere Beziehung. Mindaugas ist ein größerer Fan dieser asiatischen Küchenmischung, ich esse dort meistens nur Sushi oder Frühlingsrollen. Viel mehr Vegetarisches finde ich dort oft nicht. Außerdem sprechen die Menschen, die dort arbeiten, häufig nur sehr wenig und begrenzt Deutsch, deswegen fühle ich mich dort nicht immer so wohl. Aber für einen Krug Bier und Sushi kann man auch hingehen. Das machen wir meistens, wenn Mindaugas eine vietnamesische oder chinesische Suppe essen möchte.

3. Mir gefällt auch die Art und Weise, wie man in Deutschland mit Trinkgeld umgeht. Man sagt einfach, welchen Betrag man insgesamt bezahlen möchte, und kann dann alles mit der Karte bezahlen. Nur eine Sache: Es gibt hier noch ziemlich viele Orte, an denen man ausschließlich bar bezahlen kann. Das haben wir in Litauen inzwischen seltener.

Zu meinen Lieblingsorten in unserem Bezirk gehören ein deutsches Restaurant, in dem Menschen mit sozialen Schwierigkeiten arbeiten, und ein italienisches Restaurant, wo alle sehr nett sind, sehr gut beraten können und uns immer besonders freundlich begegnen. Also haben wir hier alles, was man für ein happy Leben braucht.

Noch besser ist, dass meine Freundin Ugnė nur zwei Stationen entfernt wohnt und wir sie in ungefähr 15 Minuten bei einem langsamen Spaziergang erreichen können. Sie wäscht unsere Kleidung und hat uns damit schon ganz viel Geld gespart!

Wir wollten dieses Wochenende endlich den Tierpark besuchen, wo Mindaugas sogar schon die Wisente durch den Zaun gesehen hat. Leider haben wir tagsüber geschlafen, und dieser Plan bleibt vorerst noch unerledigt!

Und schließlich noch etwas zum Thema Alkohol, wenn wir schon über Freizeit sprechen. In Litauen kämpft man sehr stark gegen Alkoholismus, deswegen wird der Verkauf und Konsum von Alkohol staatlich reguliert und begrenzt. Bei uns kann man Alkohol nur zu bestimmten Zeiten kaufen: montags bis samstags von 10 bis 20 Uhr und sonntags nur von 10 bis 15 Uhr. Außerdem darf man Alkohol nicht überall im öffentlichen Raum trinken. Als wir hier in Deutschland zum ersten Mal Menschen gesehen haben, die ganz einfach mit einer Bierflasche auf der Straße spazieren gehen, war das für uns schon etwas exotisch. Andererseits habe ich wieder dieses Gefühl von Glück erlebt, als ich gemerkt habe, dass ich jederzeit eine Dose oder Flasche Bier aus einem Getränkeautomaten kaufen kann! Das bedeutet überhaupt nicht, dass ich mich besonders dafür interessiere – es gibt Zeiten, in denen ich absolut keinen Alkohol trinke und ihn auch nicht brauche. Aber hier sprechen entweder meine ursprünglichen Alkoholiker-Gene oder einfach die Freude an der Freiheit!

Ich glaube nicht besonders an den Erfolg von erzwungenen Regeln. Ich meine, ich selbst hätte vielleicht manchmal keine Flasche Wein gekauft, wenn es dafür schon zu spät gewesen wäre. Aber gleichzeitig glaube ich nicht, dass eine solche Regelung einem Menschen mit echten Suchtproblemen besonders hilft. Ich habe in Litauen schon viele Geschichten darüber gehört, wie Menschen, die am Sonntag Alkohol kaufen möchten, ihren ganzen Tagesplan nach diesen Verkaufszeiten organisieren. Mindaugas und ich selbst gehen meistens erst nach 20 Uhr einkaufen, weil wir wissen, dass dann viel weniger Menschen unterwegs sind, die hauptsächlich Getränke kaufen wollen, und wir in Ruhe einkaufen können.

Hier in Deutschland begegnen uns ungefähr genauso viele Menschen mit Alkoholproblemen wie in Litauen. Trotz all dieser Anforderungen und Schwierigkeiten scheint das Problem mit dem Alkoholkonsum ziemlich ähnlich zu bleiben. Aber ohne diese Regelungen fühle ich mich persönlich viel wohler. Hier in Berlin fühle ich mich freier, und das freut mich. Auch in Vilnius wohne ich in einem ähnlichen Wohnbezirk, in dem ganz unterschiedliche Menschen leben. Und bei uns sind trotz all dieser Regelungen die öffentlichen Plätze vor den Läden oder in den Höfen ebenfalls von trinkenden Menschen besetzt. Also ist eine solche Regelung vielleicht am Ende nur noch ein zusätzliches staatliches Hindernis, das die Polizei kontrollieren muss.

Taip, šita pastraipa labai gerai papildo tavo samprotavimą, nes pabaigoje pati sau šiek tiek paprieštarauji. :D Taisau minimaliai, išlaikydama tavo logiką ir stilių:

Übrigens haben wir uns auch schon daran gewöhnt, sonntags keine offenen Läden zu finden. Mir fehlt hier meistens nur die Möglichkeit, Wassermelone, Gemüse oder etwas für die Hunde zu kaufen. Die Freiheit beim Alkoholkaufen freut mich also mehr, als mich die Begrenzungen am Sonntag stören!

Aber daran sieht man wieder, dass sich Menschen eigentlich an alles gewöhnen können. Bei uns gibt es keine zeitlichen Begrenzungen beim Einkaufen von Lebensmitteln – jeden Tag kann man alles zum gleichen Preis bekommen. Das finde ich auch bequem, besonders wenn ich viel Arbeit habe. Dann kann ich mich einfach am Sonntag mit den notwendigen Lebensmitteln versorgen. Hier müssen wir unsere Gewohnheiten an eine andere Tagesordnung anpassen. Das bedeutet aber auch, dass wir, wenn wir wieder in Vilnius sind, eine gute Dosis Freude bekommen werden!

Und nachdem ich das alles geschrieben habe, habe ich plötzlich gemerkt, dass es für mich eigentlich wichtiger ist, jederzeit Lebensmittel kaufen zu können als Bier! :D Ich nutze diese alkoholische Freiheit gar nicht so viel wie die Freiheit beim Lebensmitteleinkauf! Aber mir ist schon klar, dass der Mensch nie vollkommen glücklich sein kann. Deswegen ist es besonders gut, unterschiedliche Bedingungen auszuprobieren.

Wir schauen selbst keinen Fußball, aber da meine Freunde hier in Deutschland sich dafür interessieren, wissen wir wenigstens, welche Mannschaften im Viertelfinale stehen und um den Einzug ins Halbfinale kämpfen! Also, ich liebe diesen Sommer wieder!

Our latest patch version contains a few important fixes, including one for the Export page (#1703), which broke with our last release (v0.17).

It also adds an important new command-line tool for admins to easily clear out accounts in a single mass action (#1705). This is especially useful for instances that were affected by a vulnerability that still allowed account registrations on closed servers (v0.16 or earlier).

Download v0.17.1 now, and read on to see what’s new in this version.

User-Facing Changes

• Fix Export page rendering, regression in v0.17, by @thebaer in #1703
• Fix nodeinfo Active User stats for SQLite-backed instances by @thebaer in #1704

Admin-Facing Changes

• Add mass user management via command-line by @thebaer in #1705
• Prompt user to turn on automatic update checking during config start by @thebaer in #1706
• Fix Updates tab not showing in the Admin Dashboard for single-user instances, by @thebaer in #1706
• Show indicator on Admin Dashboard menu item when an update is available, by @thebaer in #1706

Dependencies and minor fixes

• Bump docker/build-push-action from 7.2.0 to 7.3.0 by @dependabot[bot] in #1691
• Bump docker/metadata-action from 6.1.0 to 6.2.0 by @dependabot[bot] in #1696
• Bump docker/setup-buildx-action from 4.1.0 to 4.2.0 by @dependabot[bot] in #1694

Upgrading from v0.17.x or earlier

1. Download the latest release for your operating system and architecture
2. Stop running your writefreely server
3. Replace all files in your installation (except for the keys directory) with the ones in the archive
4. (Only when upgrading from < v0.17) Update your database by running: writefreely db migrate
5. Start your writefreely server again

If you're upgrading from a much earlier version, follow the instructions in each previous release.

#WriteFreely #release

Boy am I tired today. In the ups and downs of everything it is also a family member’s birthday and I have not had the capacity to bake a cake.

My dog seems sleepy and tired today. She looks better than yesterday, but she may still be coming out of being put under anesthesia. I hope she recovers a little more and bounces back like she did last time. I tried getting some rest, but the matter of the fact is that I have been restless for 3-4 days now and staying up late with her did not even seem to faze me a little.

I need to get to work and plan out the next few days. I need a more structured plan. I feel motivated today so I will try to get on that as best as I can.

Thank you for your message. I am currently out of office with no set return date. I will get back to you when the time is right.

We made the difficult decision of doing the procedure on my dog again. I don’t know if it was the right call – financially, emotionally, whatever it is doing to her – but that is where we are now. We spent six hours at the emergency vet because there were some other more severe cases that needed to be seen before her. She did great though and came out of it like a champion. They did not remove as much fluid as the first time – possibly because we brought her in much earlier.

We have decided to set a date to put her to sleep rather than wait for this to happen again. Unless, of course, she gets worse again before the date we chose.

During that entire time, I was brainstorming tons of ideas and was frustrated that I did not have my computer with me to research and jot things down. Maybe tomorrow after some rest I can remember some of the things.

Thank you for your message. I am currently out of office with no set return date. I will get back to you when the time is right.

Gone through the bunker... Rafters pigment fads' reverence of a looping lasso. Round and around — caught! Get down! Sand on sand, clustered, throat-clogging expanse. Doom the rotten! Doom begotten! Doom the room that flips lapsed bandwidth. Every message is a citadel forgotten... A memory misplaced... A lie within the truth of a lie critiquing understanding... Life's apprehending all of man's refusal to ascend. All that bend beyond the rend. All who call the lull a withdrawal a sin. All who spin just to recycle the loss of a win. Let's pretend! Let's make amends! Let's... ...this is the end.

Written July 20,2026. © 2026 AnOublietteofThought.

Caution: This is a post about me switching from one markdown editor to another. If that sounds boring, read no further.

So check it out. I have a 16” laptop I mostly keep at home on my desk. It’s a $600ish Lenovo IdeaPad with a monitor, keyboard, and other peripherals plugged into it. I’ll sometimes bring it with me when traveling, but not when day to day commuting. I pretty much use it as one would a desktop.

When day to day commuting, I have a $170ish 14” HP laptop on me at almost all times. It’s light, and the specs are about as basic as a laptop gets by today’s standards. That’s a deliberate choice on my part. The idea is for that one to be almost exclusively a word processor.

And, I have an iPhone.

I wrote a little about this recently but to recap, I do most of my writing with Word and OneNote on all three machines and that writing is synced up with Microsoft OneDrive. I really like Word and OneNote, but neither of them are markdown friendly, so I developed a bad habit of drafting for this blog directly into the CMS instead of there. So, I got back into drafting for the blog with IA Writer. The idea is I draft there, save as .md or .txt, and publish here. IA Writer is a fantastic markdown editor, but I hit a brick wall with sync between the phone and the PCs for a variety of reasons that I don’t feel like getting too into. Maybe if I used OneDrive for everything or iCloud for everything, this wouldn’t be an issue, or maybe if I could install iCloud on the HP machine this wouldn’t be an issue -I technically can, but that machine doesn’t really have the horsepower for much use as something other than a word processor. And that, the cross platform sync issue isn’t a failure on the part of IA Writer, it’s about the idiosyncratic way I save my stuff and I will go no further into that because I’m boring myself just thinking about it. Alls I’m sayin’ is this post isn’t a dig against IA Writer.

If Word or OneNote were markdown friendly, or if Microsoft were to release an ios app for their NotePad software which is markdown friendly now, I could just use one of those and when that day comes I probably will, but in the meantime I found something else that solves the problem for now.

I’d heard good things from friends about Obsidian, and I’d read good things about StandardNotes on the write.as discussion forums. StandardNotes seemed simpler so I’ve been trying it out for the last day or so.

StandardNotes is owned by Proton. Proton’s thing is super duper encryption features. At press time, I really couldn’t care less about the super duper encryption but what I do care about is it seems to tick all the boxes of what I want in a markdown editor:

• Little to no set up toggling

• Little to no toggling in general

• Little to no learning curve -the whole point of markdown is it’s easy.

• a side by side edit/view option -I’d been spoiled by this feature in IA Writer and now I really would prefer not to use anything that doesn’t have this.

• an ios app

• a Windows app

• a web app -I wasn’t looking for it, but I love it. I’m a big fan of web apps. When people make stuff for the web, they’re making stuff for everybody. So far I haven’t encountered anything the web app can’t do that the other apps can, including the side by side edit/view. Awesome.

• reliable cross platform sync that isn’t a pain in the ass.

So far so good and it seems to do what I need it to do, and there was nothing else I’ve found that ticks all of those boxes. Although I’m a little resentful about getting yet another thing, for now, I’ve made peace with that.

-Ira

Looking into a new sketchbook

Dear Aunt Martha, Today would have been your 100th birthday. I hope it finds you singing songs to Jesus with the heavenly choir, like you always said you wanted to. It took us a couple of days after the storm hit to clear the road well enough to get to the house. By then, FEMA had switched from rescue to recovery. The river had gone back to where it belonged, leaving tons of silt and a few bodies behind. We found that young couple from upriver, their dog, and the baby huddled together still inside their expensive new Jeep lodged between the outcroppings at the fishing hole. It wasn’t pretty. Caleb said he thought you died before the storm hit. You were in your chair on the porch with your Bible in your lap and the house had not been prepped for weather. Widows were open, and some rain had blown in, but the old place had not been damaged. Patches was in the middle of your bed with a new litter of kittens. Some civil engineer with a Yankee accent kept walking around the place muttering to himself. When I asked him what was wrong, he went on and on about how great-grandpa had built it to cooperate with nature instead of dominating it and ranted about the hubris of the construction industry. Caleb spit tobacco juice on the ground and said, “Maybe this time you damned flatlanders will learn a thing or two.” Feelings are still running high in the valley 5 years after the hurricane. People grumble that the big tourist towns got most of the help and some are still living in temporary trailers. These old mountains still grab the clouds and squeeze them, reminding too many of what it was like before what we thought would last forever was blown away. It’s raining today, the same steady, hypnotic drizzle that set in before the hurricane came along. Everyone in the neighborhood has a radio tuned to the weather channel now and they get nervous whenever they hear thunder. They finally finished rebuilding the bridge and we can get back and forth into town quicker than taking the detour through Dutch Falls . I quit my job in California and moved into the cabin as soon as the courts said it was legally mine, but it took a while. I haven’t finished unpacking yet. Thank you for remembering me in your will. I was away too long. I didn’t realize how much I had changed until I was buying gas at a convenience store in town. The kid behind the register gave me the side-eye, up and down look before saying, “You ain’t from around here, are ya?” His attitude changed when I told him who my grandparents were. But I’m not so sure if I fit in anymore. I hadn’t seen Caleb since before I left, when I met up with him to get to your place after the storm he said, “You put on shoes and went to town, didn’t ya? I hope ya didn’t get too big for your raising.” Since moving back to the valley I’ve been faced with ingrained attitudes inherited from family about those who are different and unfamiliar. I thought they had been erased until I came back to my “roots.” It hit home. People in these hills remember history. To many post Civil War Reconstruction was yesterday. Family karma is passed down in subtle, social ways, too often unconscious until we take active measures to uncover them. It’s not easy and most folk don’t want to spend the time and energy to do it. I thought leaving would fix things. I had to manufacture anger like most young people do and I don’t think I ever fully separated. Life felt claustrophobic and I was not ready to marry a local boy and start spitting out babies. I wanted more glamour and excitement than that, yet your letters and care packages were my secret comforts. I reminisced about the hills under a pen name and managed to survive college by waiting tables. A PhD, three husbands, and a career teaching never filled the empty spaces in my heart. When I traveled for book tours, spending large amounts of time in cities up north and out west, I resented being treated like an exhibit in a zoo. It sometimes came in hand to have people automatically subtract 30 points from my IQ as soon as I opened my mouth. Most often it came from the “professionals”, the educated social climbers, I encountered. They have asked me whether we wear shoes where I come from and if the movie, Deliverance, was a true story. Some dared ask if I belong to the Ku Klux Klan. Gentrification is coming into these old backwaters much too fast. I was hoping it would take much longer for the tourists to find us. Last time I saw Caleb, he said that his bull had cornered a group of hikers up into some trees at the edge of the pasture. Apparently, they didn’t read the no-trespassing signs. Edith Hartwell caught a SUV with Florida plates parked beside her garden and a couple of strangers helping themselves to the corn and tomatoes. Locals won’t shop at the old store across the valley anymore since the Wilsons sold it to those people from up north. Last I heard they were opening branches in larger towns and selling nostalgia along with the horehound candy, fishing rods, and cast -iron pans. I find myself walking in the space between being a local and an outsider. I became “gentrified” through education and experience and no longer fit into a defined tribe. I think Caleb is still mad at me because I refused to marry him straight out of high school, but it’s good to see that he found a nice wife and sturdy children. Somewhere along the way I became a Zen student and I wonder how my practice will fit into my new lifestyle. Should I turn the farm into a retreat space or monastery? That feels too much like how the Wilson’s treated the old store. Thanks to Zoom, I can continue meeting with Roshi and the sangha as long as a bird doesn’t light onto one of the wires or a squirrel doesn’t short out a transformer. I could ramble on for hours and too many pages, but the sun is going down and I need to feed the chickens. Patches’ progeny are nagging me for their gushy food and I’m hungry. Instead of sitting on the porch with a Bible, I sit in your chair with a sutra or a koan. There’s not much difference between the two. I hope your celestial choir practice goes well and you get a break to peek down over the edge of a cloud once in a while to check on me. Much love, more later. Geneva

A retro-styled wristwatch, a Timex T-80 Digital watch, Pelikan, Waterman and Conklin Fountain Pens.

I've posited elsewhere that I have become something of a “techno curmudgeon” — that is someone who has serious reservations about technology, and therefore has adopted older technology. And yes, that is one possible connection between Fountain Pens and Wristwatches, but there is something else that I feel connects them, and other things that I am interested in.

So, I am not certain if this will be a series of posts or not, but sometimes I think there are things that are connected in non-obvious ways. And, hopefully those connections are worthwhile examining.

Necessities Turned Luxuries

While it is quite a niche item these days, when people think of Fountain Pens, they most likely think of Montblanc. Maybe Pelikan, or possibly Conway Stewart. Wristwatches are a little less niche, but most people are still likely to think of luxury brands: Rolex, Omega, Patek Philippe, possibly Audemars Piguet or Cartier.

But there was a time when these items weren't luxuries, and it wasn't all that long ago. That's what I want to talk about just a bit.

When Fountain Pens Were Essential

Fountain pens were pretty essential items up to around the invention of the ballpoint pen. Brands like Waterman, Parker, and Conklin were some of the most recognized in the world. These weren't the luxury items they would become.

The invention of the ballpoint pen can be traced back to John Loud's 1888 patent. However, the initial design for a ballpoint pen were not commercially successful. The primary idea was that a ball-and-socket would be used to deliver ink to a surface. Loud's primary motivation for this design was to be able to write on rough surfaces that a fountain pen was not capable of handling. However, the design proved too rough to use on paper, and so it wasn't a viable product.

It wouldn't be until Laszlo Biro and his brother Gyrogy were able to perfect the formulation of ink, and make it work with the ball-and-socket mechanism for the modern ballpoint pen to be invented. This was in 1943, which, of course was during World War II. It wasn't until after the war that these pens started to proliferate.

Prior to the invention of the Biro (and later Cristal) pen, fountain pens were the primary writing tool.

When Watches Were Essential

The history of mechanical wristwatches is a little more complicated. It wasn't until the 17th century that the hairspring was invented, which led to the creation of reasonably accurate timekeeping devices in the 18th century. However, aside from some particular uses, the modern wristwatch really didn't become a common item until the 20th century. What about the 19th century? Men mostly carried pocket (or fob) watches, which wristwatches were for women.

However, in the 1970 there was a new type of wristwatch: the quartz wristwatch. First brought to market by Seiko on January 31st, 1969 with the Astron, quartz wristwatches quickly started eroding the mechanical watch market. And about a decade later, quartz digital watches would become a new, futuristic force in wristwatches. This disruption to the market forced many mechanical watchmakers out of business, while those that survived found themselves moving into the luxury category.

Brands like Seiko, Citizen, Casio, Timex and Armitron became some of the biggest names in watches during this period in the United States. And they still are today, although the invention of cellphones and smartwatches has largely supplanted both the mechanical and quartz watch industries.

However, the interesting side to this is quartz and digital watches have not completely moved into the luxury market segment the way mechanical watches have. Many of the brands known for their quartz watches offer a range of items from everyday watches, all the way to luxury watches.

Conclusion

I think it's interesting that the items that were at one time essential, but now are seen as either obsolete or luxury items have been making something of a comeback. Don't get me know, I have no illusion that they will ever return to the prominence they had during the 18th-20th centuries. But, it seems as time and technology marches along in the 21st century there are more people looking back to the past technology, and picking up on the items that were essential and embracing them again.

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Categories: #Essays Tags: #watches, #wristwatches, #FountainPens, #technology, #time License: Copyright Unattributed. Licensed under Creative Commons BY-NC-SA 4.0.

17 July 2026

“The Moon” by David Berman, from Actual Air (1999)

The Moon

A web of sewer, pipe, and wire connects each house to the others.

In 206 a dog sleeps by the stove where a small gas leak causes him to have visions; visions that are rooted in nothing but gas.

Next door, a man who has decided to buy a car part by part excitedly unpacks a wheel and an ashtray.

He arranges them every which way. It's really beginning to take shape.

Out the garage window he sees a group of ugly children enter the forest. Their mouths look like coin slots.

A neighbor plays keyboards in a local cover band. Preparing for an engagement at the high school prom,

they pack their equipment in silence.

Last night they played the Police Academy Ball and all the officers slow-danced with target range silhouettes.

This year the theme for the prom is the Tetragrammaton.

A yellow Corsair sails through the disco parking lot and swaying palms presage the lot of young libertines.

Inside the car a young lady wears a corsage of bullet-sized rodents. Her date, the handsome cornerback, stretches his talons over the molded steering wheel.

They park and walk into the lush starlit gardens behind the disco just as the band is striking up.

Their keen eyes and ears twitch. The other couples look beautiful tonight. They stroll around listening to the brilliant conversation. The passionate speeches.

Clouds drift across the silverware. There is red larkspur, blue gum, and ivy. A boy kneels before his date.

And the moon, I forgot to mention the moon.