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PH runoff issues

Khalmenace
Khalmenacestarted grow question 4 years ago
2 of my autos, crystal candy and jack 47 started showing some spotting on the leaves. Been watering at ph of 6.2-6.5 constantly and yet runoff is showing 4.5-5 PH. All my other autos and photos have a runoff between 6.2-6.5. All plants in soil using sensi cal-mag and roots organi
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krenoime
krenoimeanswered grow question 4 years ago
Gotta raise the PH. If runoff is that low the plant goes into nutrient lockout even if the medium is full of nutrients (its probably too full of them). Flush the medium untill runoff balances out and afterwards fertilize lightly.
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