Hi thereGood job! I have an unwanted suggestion from my experience with bags: I'd stick with what you're doing now, don't try to "boost" anything. See the results, then next grow decide if you want/need to add more. If you start adding or experimenting now, maybe you run into a problem later and you don't know what caused it because you can't compare it to a baseline. Well, that's just what I wish I did my first time with it .
Recently when I go looking on scholar.google I find that the K requirement of cannabis is probably exaggerated, or something else is up. Dry mass weight does not increase linearly with adding K according to studies (hemp and drug cannabis). Luxury feed of K such as >250 ppm is pointless according to them. plant performance and yield does seem to correlate with N, up to 160 ppm N according to one study I have read.