My question would be "why unsulfured"? (Not that I even see sulfured on the store shelf)
Our girls need and use sulfur, I add it to my soil every build, plants deficient in sulfur will turn yellow from the veins out into the leaf. Also products such as terpenator(SP) are sulfur and potash. Ok I realize the sulfur could cause a drop in PH, but other than that why unsulfured?