Michael Makowski, Inc are landscaping experts. We also carries the area's best topsoil. Our soil is well-developed, Pennsylvania farm soil from our surrounding area. It is not fill dirt mixed with mushroom soil. The following is quoted from the Worldbook Encyclopedia:
"Minerals supply nutrients to green plants. Particles called sands, silts, and clays make up most of the mineral content of soils. Clays consist of illite, kaolin, micas, vermiculite, and other minerals. Trace amounts of many minerals add nutrients, including calcium, phosphorus, and potassium to the soil. Most soils are called mineral soils because more than 80% of their soil particles are minerals."