I grow some autoflower, but haven't done AK47 as yet. Nice looking plant. It will only take up that what is needed in the least amount of micronutrient in proportion. One thing I have read, and heard in a pod cast, is that Cannabis really need calcium for optimal growth. So if you are deficient in calcium, then your plant is not going to uptake as much N-P-K as it normally should. Odd I know. But I have been using Foliage Pro and find 1 tsp / gal really seems to give the right feed to my plants and they are doing stunningly.
What I see of the pictures, your plant is looking right on target for growth.
Cheers!
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