Jack Herer is coming along well. It's looking string with no nutrient problems.
It's going a little slower than usual but it seems to be doing good at its own pace.
I might top next week or might leave it and do a little LST.
Looks like calcium to me. Possibly potassium but that usually wont show until flowering. Hard to tell with the current state. But week 4 shows the start of the issue a lot better