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Yellowing… why, N, maybe Mag….😭

XanHalen
XanHalenstarted grow question 3mo ago
1/4 plants yellowing it’s the biggest and is the only one that fell victim to a topping in veg, N def? The interveinal stuff is making me think magnesium too? What y’all think…
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Week 7
Leaves. Color - Yellow
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Nocone_Purple
Nocone_Purpleanswered grow question 3mo ago
Looks like a mix of early nitrogen and light magnesium deficiency. After topping, the plant usually needs more N to recover and build new growth, and Mg helps chlorophyll production (especially under strong LED light). Try giving a small N boost and 1–2 ml/L of Cal-Mag or Epsom salts. Keep pH around 6.2–6.5 so Mg uptake stays optimal. Nothing serious she’ll green up soon
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Ultraviolet
Ultravioletanswered grow question 3mo ago
Week 5 liming the medium then add a whole slew of other organics to your medium, wondering why there are symptoms. You have 0 control of your mediums pH. The rate of release of dolomitic lime is pH-based making it unpredictable, you have organic nitrogen going to work via nitrification, alot of reactions going on, more reactions a medium has the higher the temp, if it goes under 67f or over 75f uptake can get messed up in unexpected ways . Hard to pin point with so much going on. 😕 I think after adding so much ammendments, probably should not add more to what looks like a skewed ratio of nutrients causing a pH imbalance. Most likely from all the excess nitrogen in nh4+ form causing the acidic skew, at 6.2 there will be almost no nitrogen conversion to nitrates. Ammonium NH4+ is the conjugate acid of ammonia NH3 and can release a proton in water, a process that creates an acidic environment. Ph skew. The excess H+ ions can lead to a depletion of other essential cations like calcium magnesium and potassium from plant roots and soil. That's why your plant is presenting symptoms you see.
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John_Kramer
John_Krameranswered grow question 3mo ago
Nah man, 24h is fine, it looks more K excess and Ca, N,Mg lock P.s. if u,re using 24h u,d water twice as much Keep the soil moist and stop giving K for a week. Or flush and feed anew
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Organoman
Organomananswered grow question 3mo ago
N tox. 24/0 bad 18/6 good m0use has given you good advice.
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Ninjabuds
Ninjabudsanswered grow question 3mo ago
Hey there it’s just simple lack of nitrogen if leaves get light color early flower your lacking ni
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Green_claws
Green_clawsanswered grow question 3mo ago
Looks like your asking too much from your plant.. Cake them in nutes and light is only half the story. Roots, environmental factors and co2 adds another few problems to get over.. You are trying to force feed a fat pig...
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Chubaka26
Chubaka26
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