High Leaves stress in the last week!! PLS help!

JackJollastarted grow question 21d ago

Hi everyone! First indoor grow with autoflowers. Everything was fine until week 6, even after topping, but now in mid-flower the leaves show clear stress. I thought it was CalMag, but supplements haven’t helped. Any advice? I don’t want to lose my first harvest.

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Leaves. Too many

Leaves. Color - Yellow

Leaves. Other

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squalinoanswered grow question 21d ago

ciao amico mio, direi che non è una mancanza di calcio, penso che sia una carenza di fosforo (P) e potassio (K), i due elementi che la pianta rimuove a metà fioritura per far gonfiare i boccioli e anche un blocco dei nutrienti. Controlla prima il pH dopo averlo tolto dal barattolo. il pH dell'acqua di irrigazione deve essere compreso tra 6,2 e 6,5. A meno che non siate in cocco 5.8 dovete misurare il pH dell'acqua che esce dal fondo della pentola (acqua di scarico) per vedere se c'è un accumulo di sali. e se l'acqua all'uscita è buona, aggiungi il fertilizzante per fioritura PK. Le foglie colpite non torneranno verdi, ma l'obiettivo è impedire che il problema progredisca. Regolando il pH e interrompendo il CalMag, le cime potranno continuare a crescere normalmente per completare le restanti 3 o 4 settimane.ciao amico mio, direi che non è una mancanza di calcio, penso che sia una carenza di fosforo (P) e potassio (K), i due elementi che la pianta rimuove a metà fioritura per far gonfiare i boccioli e anche un blocco dei nutrienti. Controlla prima il pH dopo averlo tolto dal barattolo. il pH dell'acqua di irrigazione deve essere compreso tra 6,2 e 6,5. A meno che non siate in cocco 5.8 dovete misurare il pH dell'acqua che esce dal fondo della pentola (acqua di scarico) per vedere se c'è un accumulo di sali. e se l'acqua all'uscita è buona, aggiungi il fertilizzante per fioritura PK. Le foglie colpite non torneranno verdi, ma l'obiettivo è impedire che il problema progredisca. Regolando il pH e interrompendo il CalMag, le cime potranno continuare a crescere normalmente per completare le restanti 3 o 4 settimane.buona giornata

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THcHunteR23answered grow question 19d ago

Environmental stress? What are your growing parameters?

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Nocone_Purpleanswered grow question 20d ago

That’s more stress than normal fade. Since calmag didn’t help, it’s probably not a deficiency. Check: your pH (if it’s off, everything locks up), your light distance (too close can stress autos), and humidity/temps autos hate sudden changes mid-flower. Also check if you accidentally increased nutrients or changed feeding that can cause shock. You’re mid-flower so the plant will still produce, but dial back any stressors now. Lower the light if it’s close, check your pH, and just feed lightly. She should bounce back if you stabilize conditions.

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JUNGLE_B4RNSanswered grow question 20d ago

At this stage of the growth, those rust spots similar to calcium deficiency spots, are a lack of Potassium…. Your plant is moving its nutrients for the flowers. It’s a sign to increase P-K.

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Ultraviolet_answered grow question 20d ago

Take a deep breath, AI is great for standardized answers, but unless there's a little more going on under the hood all your doing is wiping out that grow with bad advice. Root cause is oxygen depletion and resulting pH skew.

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cangrowzanswered grow question 21d ago

Hey JackJolla, first of all, take a deep breath! Don't panic, you are definitely not going to lose your first harvest over this. Since it's mid-flower, your autoflowers are working incredibly hard to build up those buds, and what you are seeing here looks like a classic combination of nutrient lockout and possibly a minor potassium or phosphorus deficiency, which is very common during this exact stage. The reason your CalMag supplement didn't fix it is most likely a pH issue. If the pH value of your water or growing medium is off, the roots literally lock up and cannot absorb the nutrients even if they are sitting right there in the soil. Before you add any more fertilizers or supplements—which might actually worsen the problem by causing salt buildup you should absolutely check the pH of your water and, more importantly, the runoff water that comes out of the bottom of your pots after watering. For soil, you want to aim for a pH between 6.0 and 6.5. If the runoff is too low or too high, give your plants a good flush with pure, pH-regulated water to reset the medium, and then slowly introduce a balanced flowering fertilizer at half strength. Your upper leaves are telling you they need a little reset, so fix that root zone pH first and you will see things stabilize in no time. Happy Growing Growmie🌱

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