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Magnesium nutrient lock out, triggered by too much potassium ?

Trichome_threshold
Trichome_thresholdstarted grow question 4 years ago
@Burmese Thank you so much for your help. 🙏😊 I think it was a magnesium nutrient lock out, triggered by too much potassium. I sprayed some water with Epsom salt on the leaves and it looks like it is getting better. 👍😉
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Week 4
Leaves. Color - Yellow
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Experimentgreen
Experimentgreenanswered grow question 4 years ago
Good morning, I'd say the leaf symptoms are definitely looking like a magnesium deficiency , fortunately you caught it before it started getting a lot of brown spots and progressing further up the plant. After doing your few foliar applications you might want to add some dolomite lime to the soil so it can have a steady supply over time. Just be mindful that lime products will raise the soil ph slightly. Otherwise you can always use the Epsom salt for watering the soil periodically as well. I can't say if it was the potassium lockout, or possibly the ph is off. If you continue to see more leaf troubles you might want to consider checking the runoff ph to verify it's in the right range. Good luck with the rest of the grow.✌️
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Trichome_threshold
Trichome_thresholdanswered grow question 4 years ago
Good morning @Experimentgreen 👋 Thank you so much for your detailed answer and i think everything make sense now. 🙏😀 At the first watering after repotting, i used 3 tsp of this booster with 12L Water: https://www.humintech.com/agriculture/products/biohealth-th-bs-wsg Probably it was a bit to much for the small plants because its a strong concentrate. I guess it pushed the PH of my tap water (7,7) to high and it was to much potassium. At the second watering i added some Biotabs Bactrex, that also should help to normalize the PH of the soil again.
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Burmese
Burmeseanswered grow question 4 years ago
Hey Buddy,Glad to hear that and Happy to help.Happy Growing.. ✌️
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Doktorholland
Doktorhollandanswered grow question 4 years ago
for me yellow leafs from bottom is nitro deficyt
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GMSgrows
GMSgrowsanswered grow question 4 years ago
Glad to see you have figured this out. On to a bigger harvest. Cheers friend
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