Possibly. Are you feeding and checking ppm and pH ?
Feeding yes but 1/2dose.micro bloom grow
Ppm is wild in living soil like 6000 ppm and ph on runoff is perfect
Sometimes a P or K excess will mimic a deficiency.
Might be too much food. Are they upper or lower leaves.
Upper would be excess nutes, lower probably just old dying fans.
Lowers and its from the photo still in veg
Chop chop Afghan Mass XXL @MidwestGuy @GreggT @OGIncognito
I hated this plant start to finish never looked healthy or happy but its cut washed and hung up to dry smells good. Trics were 60% amber
Nice work Grow Bro