This has become our best-selling product ever since we first came out with it, and with good reason! A rare mix of genuine Farm Dirt Compost™ - aerated, highly-biologically active compost, fine mortar sand and premium composted topsoil. It combines the microbial benefits of our compost with the tilth of sand and the high nutritional value of our native topsoil, which is usually locked up due to pH issues that the compost microbes correct. We compost the topsoil to remove as many weed seeds as possible, and then screen it fine at 1/4 inch. A true sand/silt/clay loam. No wood dust or mulch fillers.