I don't know, but I just picked up some bubble hash that was JUST made this month from 6 - 55 gallon DRUMS of leaf trimmings cut this past October hahaha!!! It works just fine, but I don't think I really would want to see what the contents of those drums looked like :wtf: I suspect the trim was dried first though, because that seriously improves the 'shelf life' if you don't intend to freeze the stuff.