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PK deficiency or something else?

Faegrows
Faegrowsstarted grow question 3y ago
Top leaves starting to discolor. I had issues with lower leaves discolouring yellow and dying which seems to have solved now that I started feeding pk yay. I only noticed a few days ago the top leaves are discolouring too. Is this a result of pk deficiency too or something else?
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Week 8
Leaves. Color - Yellow
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TheMeditrerranean81
TheMeditrerranean81answered grow question 3y ago
seems cal-mag needed..
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Faegrows
Faegrowsanswered grow question 3y ago
My light is on 60% by the way.
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