Incredible Rooftop Garden Soil Mix For Raised Beds References. Organic soil mixes, mineral soil mixes and microfertilizer soil mixes. Potting soil is a type of soilless mix that is designed for potted plants.

The simplest route you can take is this one. Web calculate the cubic feet of your garden bed. Web one common approach is to use a combination of topsoil, compost, and other organic amendments.