Leaf help

RavenCookiee
RavenCookieestarted grow question 2y ago
Noticed it a week ago and started giving CalMag. Is that right? Started with yellow-brownish random spots on the oldest fan leaves and is spreading to the younger ones. Leaf edges and veins are not affected. Affected leaves started getting light purple stems.
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Week 9
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Organoman
Organomananswered grow question 2y ago
Looks like phosphorous lock-out due to incorrect pHH.
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Shinsimilla
Shinsimillaanswered grow question 2y ago
Not 100% sure, but looks like it could be a phosphorus deficiency
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PapaBlob
PapaBlobanswered grow question 2y ago
It could also be due to a blockage from excess nitrogen. If you're using hard tap water, you should have more than enough calcium and magnesium.
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