It doesn't make sense to me that lowe's and feed stores can sell fertilizer to happy homeowner to misuse in whatever way they like, but an LCO has to have a license to fertilize. If I have to have a license to install it a homeowner has no business installing it either. I base my reasoning on the fact that my dad is in the auto repair biz and when R-12 was in car a-c systems a pro with a license was the only one that could buy it. Johnny do it himself could not saunter on down to the local Pep Boys and purchase R-12. If a pro has to have a license to install fertilizer a homeowner shouldnt be able to install it himself either.