We'll all thank farmer together as one... I'll thank Maurice from the Indian nation, for the insight into stopping Epsom Salts at the 4th week of flower (not bloom). Farmer thanks him too for the tip.
Farmer and Maurice both belong to the KISS (keep it simple, etc.) consortium of "thrift in agriculture".
I think the competitive issue of the day is, "not where you get your Epsom Salts, but how cheap can one purchase them". Cannabis reacts to the sulfur in E.S., peppers might also.