BCN Critical XXL Auto first time growing

Still waiting on my Ts600 to arrive. Floragro is slowly kicking in to boost her flowering. Definitely can see many more pistils. Some leaves have burnt off because of deficiencies or nute burn i am yet to figure out but i am holding nuteburn out because my run off was really low but since i first noticed the ppms to be dangerously high the leaves shown burns and yellowing post flush. Im guessing she got out of a nutrient lock and was showing signs of change? But other than the yellowing theyve sorta stopped. And i fed floragro on day 49, the nutes should jump her back to a running start.