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What means rusty color on leaves under LED Light ?...
Cannabis_Chrisanswered grow question 4 years ago
I see that you're using soil, which retains nutrients much better than coco or perlite. Probably cut back on nutrients and use pH neutral water to 6.5 for a day or two. Then I'd do nutrients every third or fourth watering, slowly building back up. It does looklike the plants are getting burnt, but I'm also no expert. Cheers, and good luck!
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Fruitgroweranswered grow question 4 years ago
Rusty leaf tips like that are a sign of potassium (k) deficiency , a calcium deficiency would be brown spots on the leaves.
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