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Potassium Deficiency?
FoTwennystarted grow question 5y ago
I flushed per Fox Farm feed sched after week 3. PPM of runoff was high, so continued flush until PPM readings under 1800. Now, one plants is presenting what I suspect to be a K deficiency. Flush was Fri & fed again Tue when first noticed K def. Feed again or wait?
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Leaves. Edges burnt
Leaves. Color - Mottling
Feeding. Deficiences
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FoTwennyanswered grow question 5y ago
@The8thChevron, The fox Farm Feed schedule cites 2100-2310 for the 4th week of 12/12 when growing in soil. I was trying to shoot low, because I usually half strength things as it is. I am pushing more light than I ever have so thought I could go a little higher with the PPMs than half strength. So, you think it's too high and locking out? I do have a fair amount of coco in my soil mix too and the FF Coco feed schedule cites 1470-1610 PPM for this stage of flower. So, you may be right about too high PPM.
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The8thChevronanswered grow question 5y ago
1800 is still ridiculously hot. Unless you're reading EC, that is. Assuming its ppms and not EC, you probably have a lockout and need to keep flushing. 1800 EC is still a little hot around 850 ppms, but you shouldnt have to flush more.
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