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pacnw-dan, lobogrow and phenominal_phenos
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Yes. IMO, that seems to be magnesium deficiency because it is fading in-between the veins. In the veins, it stays darker. Easy fix.
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@Phenominal_Phenos Epson salt feeding here I come
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Interveinal chlorosis. Mg deficiency. Add MgSO4 (Epsom Salt) 1.5Tbsp per gallon for a few feedings, then you can probably drop back to 1Tbsp/gal as it clears up.
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