Discount female seeds, auto blueberry

you have a ph issue that is causing lock out, flush your plant until your run off ph is at 6.0 let the plant dry out for a bit and when you start back feeding add cal mag and pick up sum kelp, kelp will help the plant bounce back and will help the roots get and stay healthy, cal mag is needed through out the grow for healthy growth during veg but its main job is making those buds big, give cal mag every feeding, give kelp every other feeding

My guess would be youve got some salt build up going causing some toxicities and locking out some others causing deficiencies. It appears that you have some N Tox going on judging by the dark green and glossy leaves, that can lock out calcium which it appears to have a deficiency of also. Id flush real well, maybe with a salt clearing product like floraKleen, then give just pH'd water or very light feeds the first couple waterings afterwards. Good Luck!