Thoughts?

Had a grow awhile back, couldn’t figure out what it was. I repotted and it was fine.

if the leaves continued to yellow up, im guessing the start of a trace element def that the new soil remadied. NP n K PROBLEMS STArt on the large outer leaves, whilst trace element problems start on the inner leaves , like the picture shows.

if your growing in dirt/soil. try giving the plants a dose of seaweed solution, that will stop it from hsap[pening. i allways put seaweed meal in with my dry amendments when potting up or making the starting soil. this stops any problems with trace element in future.
a half dose of seaweed solution each week and i never have trace element problems