Essential Plant Nutrients - Grasscity.com Forums

By looking at the pics in the link my guess would be the zinc and boron pic looks very similar to your pic.

Phosphorus looks similar too. Im not expert just comparing pics.
valstar Reviewed by valstar on . can't pin down the issue first pic is of some bubba kush i'm vegging, second pics are hasberry 4 weeks in, had green leafs a 10 days ago. Using house and garden soil nutes, roots excelorator, budxl, top shooter, shooting powder, molasses. i only used ph water, root excelorator on the bubba for the first few weeks then i started adding the H&G A+B and that when i got the discoloration, but only on some of the top leafs. Same with the hashberrys they started budding outdoor so i transplanted from 1/2gallon to 2 Rating: 5