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Is this a problem? Rust mold?

maelxich
maelxichstarted grow question 4y ago
Are these spots fungal? I had this happen last grow in this tent with a humidifier, though I’m not using it for this grow. I’ve bleached the tent and pruned the leaves. Am I in trouble?
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Week 10
Leaves. Other
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Roberts
Robertsanswered grow question 4y ago
Looks like the beginning of potassium deficiency.
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Aquemini
Aqueminianswered grow question 4y ago
Its just starting so don't worry to much. Its either potassium deficiency or cal-mag deficiency. I'd start with cal-mag as it's much harder to over feed cal-mag. If it's a potassium deficiency you'll know because it will get bad over a few days but it's easy to fix and takes only a few days to stop symptoms.
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