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Deficiency or environmental?
NobodysBudsanswered grow question 5y ago
if any lower leaves have necrosis, Fe def
Zn def, since i didn't mention which before. starts at top, from in-to-out on leaf.
A slightly more acidic soil will help with both Fe and Zn without changing anything else, too.
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NobodysBudsanswered grow question 5y ago
Looks like zinc, but check pH first. that's more often a cause of trace element issues. If you use RO water, switch to tap. That may fix the problem with the trace elements too. (some exceptions for hard water > 300ppm)
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