yellow and brown fan leaves....someone help me

so all of my fan leaves are now yellow and turning brown...curling upwards starting to fall off...there 2 blueberry clones under a 400 watt hps..in ocean ..forest....i did flush they plants 2 days ago...just wasnt sure when i should hit it with nutrients again???? 2 days leter there still yellowinng on me...should i hit them with ff big bloom ang tiger bloom...the feeding scedule says to use the grow big as well??? anyone please help..im in the 3rd week of flowering and all of the budds look great...just gonna suck if these die on me....and no i dont have pics...i just want to know how long before they turn green after the flush and nutrients???? thanks guys
 
Top