-- all lowers, right? Looks like basic N defc. fan tapping that is,... N being pulled from these lowers to support bud production, perfectly normal for this stage,... What FF nutes are you using now, Tiger bloom and Big Bloom? Note, BB is very very weak stuff as far as NPK#'s go,.. all in the decimals! It's good stuff, but NOT a significant source of NPK,... Tiger has a decent amount of N in it, so unless the fans are fading very fast, stay the course, maybe up the conc. to 3/4 strength,.. how often do you feed? Are these photo' plants. BTW?
These are auto flowers about 7 weeks in growth. Using all 3 FF bottles at 50%- should I use Big Grow with lots of N? Also, should I use Cal Mag plus for N. Right now, some of the leaves are a little burnt too and the yellowing is worrisome. Thanks