Your PH is too high,need's too be at 6.8.Your pot's look too small,so prolly root bound.look's like your over-watering.
Some yellowing is normal in flower (for some people) but most of the time I dont get the N def. If your PH and PPM are correct,your chances of N def. are far less.
At this point i would not transplant them.but flush them,then set the ph at 6.8,and feed them a proper mix of bloom fert's