I have 1 plant that is turning brown leaves in the ends and turning uo .They are 43 days in to flowering ph is 6.3 in soil, my ppm run off is at 820 lighting is at 12 on 12 off . The rest of the plants seem to be fine.
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How close is your light? Maybe light burn or could be just too much nutrients others probably have a better idea than i do but to me its nothing too serious yet
Or maybe a calmag deficiency
Lights are at 20 inchs
Maybe calmag deficiency do you ever feed it to your plants? Heat stress and overwatering can look like that too.
It favors heat stress as most damage is at top. That pic isn’t very clear…
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What lights?
Need to raise your ph to at least 6.5 maybe closer to 6.7 .
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