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Nutrient or water temps? Water temps between 15⁰C and 20⁰C but usually closer to 15⁰C.
KaptainKronicXstarted grow question 3 years ago
Not sure if it's a nutrient deficiency/excess or water temps. Please refer to pics. 2/3 plants are showing light green and yellow tips. New growth seems light in colour as well.
pH - 5.9 to 6.1
Daytime temp - 75⁰ to 79⁰
Night temp - 67⁰ to 70⁰
Coco with Gaia Green 444 and 284
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SleeplessWalkeranswered grow question 3 years ago
If it is pH, it also looks like you have a lot of new growth, and adding a lil more phosphorus might help.
greenthumbartisananswered grow question 3 years ago
99% of the time, if you see something looking like Zinc or Iron deficiency, it's almost always a pH issue. Had similar issue due to pH meter going bad and lying to me. Fixed pH and fed deficient nutrients via foliar spray until problem resolved.
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hafthor_growsanswered grow question 3 years ago
If you are growing in coco with Gaia green the ph needs to be at 6.5 to 6.8. Organic amendments are ph'd higher.
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Mrs_Larimaranswered grow question 3 years ago
Looks to me like aPH problem
your Ph is to high,
and that looks like airon defiency
seveeral things lead to this, stressing envoirement, wrong nutes, overwatering etc, look for the roots
i would give them aflush, check ph before your feedings ( check the solution)
i let you alink for the remedies
https://www.growweedeasy.com/cannabis-plant-problems/iron-deficiency
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