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Some of the leaves are having some yellow dots on ...
Foerstererstarted grow question 7 years ago
Some of the leaves are having some yellow dots on them (See pictures) and some top leaves have yellow tips.
What are those dots and yellow tips? Is this a bad sign if so how can i fix it?
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Athosanswered grow question 7 years ago
With no EC/PPM information it's hard to give an accurate diagnosis. That the pictures are under purple light does not help. Anyway I think it's calcium deficiency, due to either soft water (if your water PPM is lower than 200, there's a high chance this is the cause); or it could be due lockout caused by nutrient excess, those burnt tips support this theory.
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DudeGrowsWeedanswered grow question 7 years ago
The yellow tips indicate nutrient burn. The yellow spots could be a calcium or phosphorus deficiency, but could also be a sign of spider mites. Good luck!
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