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is this a potassium deficiency? was about to flip to flower today.

gongha
gonghastarted grow question 3 months ago
6/7 my plants looked exactly like this. 6/9 top amended 4-4-4. yellow/limegreen edges went away only the tips are mainly effected lasted till 6/19. on 6/19 watered at ph 6.8. on 6/21 my plants now have this yellow lime green tip mainly on new growth. what would u do???
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cultivars
cultivarsanswered grow question 3 months ago
I'm dealing with something similar and wonder if it is an excess of potassium. From your pics it was hard for me to tell what might be happening on the lower leaves, but I think that if the chlorosis is happening in new growth, and it appears it is, you have an exceedance. In organically amended media, I'm not sure how you can quickly address it. I'm going to try some frequent watering, watching my pH then do a transplant to final pot and hope for the best.
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AsNoriu
AsNoriuanswered grow question 3 months ago
I can agree, nitrogen toxicity, lack of magnesium, that could cause potassium too, some verge burn reminds a lot potash.
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TickleToast
TickleToastanswered grow question 3 months ago
That is Nitrogen & Magnesium Deficiency, lower your PH a smidge closer to 6.0 Growmie! If it worked then new growth will look improved and old growth with remain the same.
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modmyplants
modmyplantsanswered grow question 3 months ago
pH was off value
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