Discover the perfect plant food: Insect Frass! Unlike the guano of bats and birds, Frass comes directly from the plants themselves. In natural ecosystems free of man-made pesticides, insects feed on and digest plants, then return nutrients to them in the form of Frass. It's a mutually beneficial relationship—plants support insects, insects support plants. And, because it only comes from vegetarian insects, Insect Frass is 100% vegan!