Teresa, I have used many different things over the years. Milorganite, Osmocote, Alphalfa Pellets, Alphalfa Meal, Mycorrhiza, Dr Earth all purpose fertilizer, Dr Earth compost, Miracle Grow garden soil as part of a mixed amendments when planting in new garden extensions, sand to help with clay soil, vermiculite, perlite, Worn Castings, Bat Guano, manure, garden compost, leaves and grass clippings from fall collection and on and on
