I use an organic mix called Filthy Rich. (Dr. Q) Tiz a fairly hot soil.
Doesn't make 'em hermie, doesn't make 'em revert to veg.
Makes 'em stretch, and adds more N that you'll want to deal with prior to smoking. (curing) Won't kill ya, but affects taste.
Normally, in flower, yes...you want to restrict N late-stage as much as possible, without getting overly anal about it, lol. As long as you aren't using a Miracle Grow soil for transplanting deep into flower. Freaks the ladies out, and results are sub-par.