Manganese deficiency or rust?

Gemini_Growstarted grow question 6y ago

Could it be manganese deficiency or rust? Few upper leaves are affected this ways showing some brown dots.. Could it be due to a PH fluctuation I had recently? Need some help

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Leaves. Color · Dark-brown

Feeding. Deficiencies

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Trichsteppinanswered grow question 6y ago

I think lt looks like P abundance which will lockout Magnesium and calcium

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Athosanswered grow question 6y ago

Textbook potassium (K) deficiency

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