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What type of deficiency or imbalance is causing this?
Johnny2Fire4Ustarted grow question 3 years ago
why is this happening to my lower fan leaves only?
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InspireMeanswered grow question 3 years ago
Hey mate, looks like a nitrogen toxicity. Very dark leaves suggest that. The curling could be due to the leaves dying or due to heat stress. I'm swayed more towards dying off due to too much nitrogen.
You need to cut the N or drastically decrease it.
Hope this helps 😁
JUNGLE_B4RNSanswered grow question 3 years ago
It’s an evapotranspiration problem. It can come from many factors like, humidity too high or too low, temperature is too high, and finally most of all the time it’s a high EC level of the soil. Check the drain with an EC meter to control the level of the soil.
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MrStinkyanswered grow question 3 years ago
Yep. That's a case of 'cut-off-the-plant-itis' right there.
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