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Brown spots
Nor_Cal_Kannablissanswered grow question 4 years ago
Sounds like a nutrient lock-out, or possibly toxicity, likely due to a pH imbalance. How are you measuring the pH of your soil and water?
The pictures above, that is very likely what is going on, a pH nutrient lock-out. Check that runoff ph. đ¤đ¤
MrGreenMananswered grow question 4 years ago
Also looks like a phosphorus deficiency, but like the other guys said, if you arenât watering with runoff or enough of it or you arenât checking your runoff ppm and pH a flush is probably best
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StonerJesusanswered grow question 4 years ago
Rust inside the main fan leafs like that is exactly that ph soil and water.
I would do a sledge flush and evaluate.
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