I've been feeding mostly grocery store/farmers market produce while my newly planted tortoise garden is getting established. That will be the only safe site in my vicinity since we live in a subdivision where all common grounds get spayed with chemicals. I planted bunch of great weeds and tortoise edibles in the organic garden plot which became my RF enclosure. As for the store bought produce I believe there's nothing wrong with it, just give it a good wash prior to feeding, just in case