This is my first grow and I started plants into flower in cfl, made them purposefully small. Switched them to 400w hps a week into flower. They are now getting on to their 5'th week with 3 or so left. I've fed them nutes once in veg, never again. The soil is a organic blend amended with ewc and fungi. My ph in has always been 6.5-7.0, and runoff measures good too. I do have "heat" issues; since I grow in a garage I get to 101F on 99F days, but the heat has been worse in the past for longer and had no issues. I dump a lot of outside air which I think is helping. I'm wondering if this is just normal or if I have a nute deficiency starting? The first two pics are of a sicker plant, and the third is of another plant starting to show it on the bottom fan leaves more but overall the lush green they had has disappeared.