Question: I am growing lettuce and parsley in a salad table. The growing medium is Pro Mix with Milorganite. There has been recent news about PFAS in sludge based fertilizers. According to a Sierra Club and Michigan Ecology Center study of two PFAS chemicals, PFOA and PFOS, showed that these chemicals are present in Milorganite. read more Should I dispose of plants that are grown in soil that contains PFAS chemicals?