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Root rot?
m0useanswered grow question 3 years ago
It would only be root rot if your overwatering heavily and the medium has got compacted to much causing lack of oxygen to the roots.
I would also expect this to show on the whole plat not a new leaves.
leaning more nutrition relayed.
Check to confirm your feed is complete and providing enough for the plants.
Good Luck!
Wrongholn519answered grow question 3 years ago
I've got the same issue and I think it's damage caused by fungus gnats. They got out of control with my latest grow and my work schedule.. it's left a few brown spots on some of my leaves.
I've eliminated so many other possible causes. It's either from the fungus gnats I had or its possibly a calcium deficiency but I don't think it's calcium.
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