During a large growth period like making buds plants pull all they can get from roots and leaves if needed. My thoughts in my first run were to up the nutes a little for a week to help them out. Not sure if it was right, but did not turn out bad. The plants really want more P-K during flower. Thats what is in most all bloom nutes.
Thanks I figured as much since I go half strength on the nutes but maybe I'll start doing full strength and see how they respond. I agree I think they're just sucking out of the leaves I'll feed them better