Yes it DiD thru week two of flowering I'll add a bit more this week see if it slows down the yellowing process flora grow and flora bloom are my nutrients
a whole plant pic would be more telling but
I notice my outdoor vegetables and fruit plants also shed leaves this way as the fruit matures. My indoor marijuana plants, organic fed, do the same as the plant matures and uses other nutrients to produce buds. I never worry about a few old fan leaves falling off mid flower, they all do it, unless jammed with nitrogen of course, but that loads your buds up to, with more vegetative growth, unburned carbs and such, requiring ridiculous ferment time to rid the off flavors. ever smell a fertilized lawn? over fert weed smells and tastes the same to me. I dont smoke leaves, or ferment cure or take pics, so.......when they yellow or die off as their end is near..., I could care less. my buds finish like a boss, I got less trimming and less vegetative growth in my rock hard buds.