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Potassium burn?

2x2growingstarted grow question 5y 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.

2x2growing

2x2growing

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Leaves. Tips - Burnt

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CRiSPrGrowanswered grow question 5y 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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DoctorGreenThumbanswered grow question 5y 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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Festerusanswered grow question 5y ago

As well as the very purple stem on some fan leaves, very indicative of a calmag deficiency.

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Festerusanswered grow question 5y 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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