Where is the yellowing happeneing on the plant? Lower leaves, top?
what medium are you using? I veg with the same 1 tsp/gal and no yellowing at all.
It's mostly the new growth/whole pant.. It's def an N deficiency. I hit one of the plants last night with some extra N to see if anything would change today and the plant looks wayyyy more green than the rest already. I am growing in straight canna coco.