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Potassium burn?

2x2growing
2x2growingstarted grow question 4y ago
Does this look like potassium burn to you guys? Brown tips along the perimeter of leaves with brown spots. Been going light on the K lately so maybe I’m starting to show deficiencies. Week 6 of flower. Runoff ph 5.9 (soilless). Ppm 1500+ (Tds meter broke recently.
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Leaves. Tips - Burnt
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CRiSPrGrow
CRiSPrGrowanswered grow question 4y ago
hey there Drimsnbuds, That's absolutely N toxicity actually. You can tell from the "too green" and shiny aspect of the leafs. The browning is just the burn from over feeding. hope this helps ! 🚀
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DoctorGreenThumb
DoctorGreenThumbanswered grow question 4y ago
1500 is high for week 6. I would feed water next feeding and do and test the runoff again. gl
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Festerus
Festerusanswered grow question 4y ago
As well as the very purple stem on some fan leaves, very indicative of a calmag deficiency.
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Festerus
Festerusanswered grow question 4y ago
I’m not an expert, it could be excess phosphorus, which causes tip and margin burn as well as causing cal mag deficiency. which I see magnesium by the “random” spots on the leaf and the yellowing from the margins in towards a green vein. I hope this helps in some way! Happy growing!
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