foxfarm extra strength flowering

what do you think is wrong? sativa strain, about 2or 3 weeks into flowering, using full strength about everywatering (which is everytime is its really dry) and then sometime just plain water every now adn then.

I see Magnesium deficiency for sure, and I think you have too much nitrogen in the soil for flowering, which is why your plant is so leafy looking.
Get on youtube and search for Magnesium deficiency with time lapse camera, notice the similar appearance

If I think there is a nutrient problem, the first thing I always do is check PH. once that is ruled out then adapt your nutrients.