This is def a K deficiency, compounding Mg/Ca problems. How much Floragro are you using? You'll notice most of the K in GH 3 part, is actually in the gro. All three of these have to be used in conjunction with each other. The levels of each changes depending on where your at in your grow....but if your not using any gro right now with four weeks to go, it's no wonder your K deficient. Right now is when i'd start backing out of the gro and adding KoolBloom, to give them even more K.
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