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

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.

Wassermelone – 10. Juli

Heute hatte ich einen sehr ruhigen Tag, und nach den gestrigen Emotionen war das sehr erleichternd. Unsere Kollegin Constanze hat eine schöne Wassermelone ins Büro mitgebracht und sie mit selbst angebauter Pfefferminze vorbereitet. Das war eine sehr schöne Entdeckung. Ich mag Wassermelonen sehr, aber sie sind etwas kompliziert fürs Essen vorzubereiten. Deswegen fand ich es eine sehr schöne Idee, die geschnittenen Stücke mit frischer Pfefferminze zu mischen, sodass sie noch einen frischen Geruch bekommen.

Der Sommer ist für mich mit einigen traditionellen Sachen verbunden, unter denen die wichtigsten Schwimmen im See, Eis und Wassermelone sind. Das Meer gehört für mich nicht so selbstverständlich zum Sommer wie genug Wassermelone und Schwimmen im See. Und da Schwimmen für mich hier noch nicht so erreichbar ist, esse ich fast täglich Wassermelone! Wenigstens eines der wichtigen Elemente für einen perfekten Sommer ist damit aktiviert.

Fast jeden Tag kaufe ich hier eine kleine Wassermelone und habe im Hotel mein wunderschönes Ritual: im Sessel sitzen und diesen sommerlichen Prozess genießen! Man muss ständig die Wassermelone schneiden und essen und schneiden ... Die Hände sind nass und klebrig, der Bauch voller Flüssigkeit, und das Beste ist, dass diese Freude sogar im Hotelzimmer erreichbar ist! Einen großen Teller und ein Messer haben wir inzwischen auch. Außer Sandwiches und Wassermelone haben wir hier keine weiteren kulinarischen Besonderheiten.

Da ich heute schon so detailliert auf kulinarische Freuden und Herausforderungen eingegangen bin, muss ich noch hinzufügen, dass für einen echten Litauer das Leben ohne normales Brot sehr schwierig ist! Wir haben in Litauen eine ganz bestimmte Brotsorte, die international nicht unbedingt so verbreitet ist. Unser traditionelles Brot ist dunkel und hat einen starken Geruch und Geschmack. Hier kann man in den Läden natürlich auch Brot finden, auch ganz dunkles, aber es riecht nicht so ... Nicht so litauisch.

Wir haben auch ziemlich hohe Anforderungen nicht nur an dunkles, sondern auch an weißes Brot, das ebenfalls schön und frisch riechen muss. Hier in Berlin finde ich meistens geruchloses Brot, und das ist für mich ungefähr dasselbe, als würde ein Mensch ohne Intonation und Emotionen sprechen.

Also vermisse ich das Brot! Aber noch nicht so stark. Besonders im Sommer, wenn es so viele Wassermelonen gibt.

Übrigens muss ich hinzufügen, dass ich auch viele andere essbare Vorteile hier in Deutschland sehr schön finde und zu schätzen weiß. Erstens ist es hier beliebt, dieses halbgebackene Brot zu verkaufen, das man zu Hause selbst fertigbacken kann, und das finde ich sehr schön. Natürlich nicht für jemanden, der im Hotel lebt, aber grundsätzlich muss man sich darüber wirklich freuen.

Außerdem gibt es hier eine große Auswahl an leckeren vegetarischen Produkten, die in Litauen nicht so vielfältig ist. Angefangen bei allen möglichen vegetarischen Würstchen bis hin zu veganem Käse, Lachs und vielem anderen.

Meine Assistenten sind allerdings sehr klug und können diese vegetarischen Produkte sofort unterscheiden. Mindaugas sagte zum Beispiel, dass eine Sorte Würstchen genauso riecht wie die „echten“ Fleischwürstchen. Aber nicht für Begemotas und Pipiras. Ich versuchte, beide mit meinen Leckereien zu verwöhnen, aber sie wollten sie nicht einmal nehmen. Also sind sie beim Essen wohl eher Mindaugas' Freunde.

Noch eine schöne Sache: Hier in Schöneweide gibt es ein sehr gutes Burger-Café! Oder vielleicht eine Burgerei? Wenn wir eine Wäscherei und eine Bäckerei haben, dann können wir doch auch Burgerei sagen? Auf jeden Fall haben wir am Abend einen Burger mit Halloumi probiert, und der war viel besser als diese geschmacklosen Burger von McDonald's!

Am Wochenende werde ich sehr wenig machen, mich vielleicht nur ein bisschen mit meinem Schreiben beschäftigen und noch mit meinen iMovie-Studien. Und nächste Woche ist unser Büro im Urlaub, aber ich werde trotzdem manchmal hierherkommen, weil das Internet nur hier wirklich gut funktioniert. Im Hotel haben wir damit auch einige Herausforderungen.

Aber dort, wo es gute Burger, eine gute Eismanufaktur und noch dazu funktionierendes Internet gibt, kann ich auch lernen und arbeiten!

You fan my fire. You have access to my love and passion. You flaunt me in front of your peers. You benefit and feed off my energy. You love the idea of me. But when it counts, you bail out. You run away. You don’t have the capacity to match my depth. I find myself frustrated and unfulfilled. A relationship with you is transactional. I look back. It has always been that way.

It’s been a while since I’ve written something of substance I feel like so I guess today is that day. I feel like I’m more and more coming towards the conclusion that I am not really interested in K In the way that I would hope I would be for a partner and I know that my brain can be irrational and I’m kind of feeling a little bit low right now and so I’m not rushing to anything and I’m waiting for my therapy session to talk friends and such, but I feel like she hasn’t even done anything to egregiously wrong, but there’s just enough things that I realize it isn’t really what I’m looking for. I really dislike the fact that I just am not attracted to her in the way that I thought I was if I’m being honest. We went to the waterpark for our first day and I just didn’t really find myself attracted to her. I also thought she was a more confident person on first impression and more extroverted, but as I got to know her a little bit more, I recognize from the things that she said how she does still struggle with insecurities, and generally isn’t that extroverted or social. And I recognize that in my mind it more drifts towards Oh. I can fix that rather than it be something where I feel like wow that’s like admirable and I would like to be more like that. I also feel like she heavily depends on the friend group that she has, and that’s kind of it. She’s also pretty introverted according to her and doesn’t feel like that up with the kind of person that is best for me. I also feel like she is trying hard to get me to like her, which is nice, but at the same time it feels like it’s almost like she feels like I’m out of her league. And I kind of feel that way in someway. And I feel like myself I am settling for someone that is a really bad sign, enough for me to seriously reconsider everything. Especially this early on. I know that I’m also just not really feeling good so everything would be great, but I find myself almost avoiding her texts or dreading them. I find myself thinking about Moore and More how I can reject her or let her down easily with the minimal amount of pain to her. And I find more and more reasons to call it off rather than to continue. I think I will go on a second date, but I really don’t know if I see this as a relationship.

It sucks both because I feel bad for her, because I think she is really cool and personality wise. I think we get along pretty well, but I just can’t help myself from not really feeling attracted to her or being interested in her in that way. And I wish I could, but at the same time I still feel like I’m settling, and I feel like it would be one of those things where I would feel like I am punching down in someway. I just feel like if I have the option to swap lives with her I would never make that choice. And I feel like the fact that I don’t even consider that for a second makes me concerned. And I feel like a shitty person, even though I know that I’m kind of writing this to no one, but it really does feel like I am out of her league. I hate how much I’m stating that, but I guess it’s because I feel like I haven’t yet found the words to convey it in a way that I feel happy with. And I feel really vain and shallow, but I just don’t find myself interested in her, and it feels more like she is someone who wouldn’t really have a separate life aside for me that I would find fascinating. I feel like she meets a lot of the criteria for some of the basics I’m looking for, like kindness, a level of independence, and humor to some extent. But when I think about someone coming along in the future, that really does line up with a lot of the things that I want rather than the necessities, I feel like I would want to be with them rather than my existing partner if I decided to date K. And that is fucked up and not the kind of situation I would want to be in, and the fact that I don’t feel like K is that person to begin with is enough of an indication that I should listen to that. I still want to at least go in a second date and talk with my therapist, of course, but I feel like I’m more and more making up my mind.