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Brown spots on upper fan leaves

Ghost24
Ghost24started grow question 19 hours ago
Can someone please help me identify what this could be and how to prevent this from happening again. I'm growing Auto's in hydroponics, using plant prod bloom and adding calcium nitrate, EC 1.8 - 1.9, ppm around 800-900, pH 5.9-6.0, water temperature around 27°C. Help please
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Nicogreen
Nicogreenanswered grow question 5 hours ago
Kunne godt ligne et stress eller måske et drop i din ph værdi og for hurtigt op. Prøv engang stress down. Og måske tjek ph igen og lade den tørre lidt mere ud inden du vander kan være tegn på for meget vand og fugt i tiden du desværre IKKE DEN ENESTE DER STÅR M DET PROBLEM 😳😉
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DaddyPrime2
DaddyPrime2answered grow question 7 hours ago
calcium deficiency or maybe chlorine?
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Organoman
Organomananswered grow question 9 hours ago
Extreme potassium deficiency.
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Dabking
Dabkinganswered grow question 19 hours ago
A few issues caused by incorrect PH. Just re adjust the next feed and continue on. Manganese and Potassium deficiency.
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