for the most part curling or "clawing" is a early sign of over feeding, and will become nute burned if you keep up the heavy feeding. one thing i will swear by is less is always more. again,i can be of more help with something to look at.
i dont have a journal yet,just started my account here.i just gave my girls some super bloom too c if that will help the curling.her leaves r a sweet green so it is something small i hope.i dont think it's bad enough too change my rotine.i think!