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Been feeding 10-10-2 bat guano (super grow) and no...
Athosanswered grow question 7y ago
Rust spots on older leaves are sign of potassium (K) deficiency, on the other hand phosphorous (K) deficiency shows as black, dark metallic spots on lower leaves
motaman311answered grow question 7y ago
The old leaves/brown dead spots won't go away on the leaves that have already been damaged. The PH drop and feeding too many nutrients will cause lockouts to other elements. I would continue as you are and if anything gets worse, or progresses then look at your feed schedule, soil, + stage of plant. Good luck and happy growing 💪!
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