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yellow leaves

Tektonik80started grow question 6y ago

Blackberry Kush is looking yellow on top. I've fed her twice now and keeps getting worse. Not sure what the problem is.

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Leaves. Color - Yellow

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NobodysBudsanswered grow question 6y ago

other things can cause yellow at top that are toxicities... so if it isin't improving, stop. based on what you describe of recent behaviour, i'd lean toward a toxicity. P and K tox can cause what you see... if some lower leaves get burnt tips and spots, it's K. If it's burnt tips anywhere and darker foliage, it's P. (both can have mg/ca spots)

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Harlzanswered grow question 6y ago

She looks very young to be feeding, I would say half strength feeding once in her life at that stage would be a lot. I wouldn't feed any more, you might have altered soil pH and it is having trouble now. Keep watering when soil is dry, less nutrients might be more right now.

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MrBlocc420answered grow question 6y ago

It’s hard to tell from the photo but it looks like your leaf is starting to yellow from the back of the leaf to the front of The leaf if that is so the you have a sulfur deficiency. Sulfur tend to get locked out at higher ph levels if you are feeding. Hope that helps and good luck to you ✌️🏾

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