Hi everyone I'm new to the forum and I would love to get some great advice and answers . A few years ago I tried growing a sweet potato plant in a large container full of store bought black kow manure from Lowe's (I know bigggg mistake I know that now but back then I didn't know that). The plant slowly died and I pulled it out. Since then the manure has been sitting in my backyard exposed to the elements for a few years now and was wondering if its still good to use. I'm kind of worried about having to use it because of fear of unknown bacteria in it since it sat out for so long. Only thing that knew in it was weed.