sweet ZZ outdoor

hi guys, so situation: i guess we are 2 week from the cut, if the weather keep this sunny and warm September. update on the plant: first of all I'm pretty disappointed of the size of the colas, very very small, not nearly as thick as I would imagined. Since I've been growing a lot of autos recently I had more big colas with them than with this fem, just disappointing. so now the problem is: why are the colas not that dense? yes, I had a problem with K (deficiency) at the start of flowering, but was in early stages, and i quickly added K to the solution. my guesses: -I used product of the line biobizz, the try pack, and I think they were just not good enough for a feminized plant, because the pH was right all the time so i don't think it was a block. -didn't topped my plant, I know its a way to enhance the production, but I was curious to see the normal growth of the plant. -grown in pot, maybe wrong pot? too hot in the summer? -wrong substrate? (I mixed three different types, adding compost and manure, beside perlite and vermiculite of course) -bad climate/genetics? (this year was heavy hot but a lot of rainy days too, often in spring) the quality seems fine, nice smell and very sticky on the hand but very very small buds :( the last week an invasion of borer, I hate those fuckers, it's impossibile to control them, as soon as I stopped the foliar application of neem/aloe they arrived, really annoying.