i would say by the pics and my oppinion is they are hungry looks like there starving for N but at this kinda stage its your call depending when you wana harvest?
I use all bio bizz products apart from the root juice and im giving 4ml bloom and 2ml grow along side the others i use at this stage. Ive had it where my leaves looked the same and i just bumped up the grow for a couple of feeds then back down to a small amount i usualy try and stop the Grow 10 days or so before harvesting just to give her time to finesh up on her own
Im trying a few differant doses at the moment so ill update the bio bizz thread i have when im done

Si