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Nutrient burn or nothing to worry?
The8thChevronanswered grow question 3 years ago
Some damage from nute burn/deficiency is irreversible. This includes yellow tips and is especially true in flower where new leaf growth is extremely slow.
Your goal should be to stop it from spreading. Don't worry so much about minor discolouration, if it's not getting worse, don't worry. Any correction will probably do more harm than good and will just confuse your diagnosis.
The8thChevronanswered grow question 3 years ago
Looks like you had PK burn btw. If you flushed it and your pH and EC are good, then I wouldn't worry. The drooping looks like a little oxygen deprivation in the nutes caused by the flush.
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