Hi so im into about the 3rd week of flowering for my two AK47 ladies.. and when i went to go check on them alot of the leaves turned yellow (with in a day) the yellowing leaves where from top to bottom.. soo im wondering would that be a lack of N ?? i was jsut figureing maybe not enough food since there getting really big now ( 2+ feet) my food im using is Canna Substra stuff soo its already really low NPK i was feeding them almost full strength can i up it to more?? i feed them only once a week.. can i maybe feed on normal feeding then the next watering jsut use a low doses to hold them threw till next feeding???