sick & dying easy ryders?? Help! PICS

i have 17 easy ryders that are on day 32. they have been flowering for mabye a couple weeks and now they are starting to look very sick!i think it might either be a nute defficiancy or nute burn.. the lower leaves are yellow and crispy and dying, and some plants are curling down like a claw.theyre in FFOF and i just gave them their first feeding of nutes last watering (4 or 5 days ago)anyone have any idea wats going on?? thanks i appericiate it!











http://i1223.photobucket.com/albums/dd501/treesforme/IMG00716-
20101116-1057.jpg

anyone? the bottom leaves are dead and yellow now, can anyone help?..