http://www.durgan.org/URL/?HMYWR 12 August 2011 Making Potting Soil
Home potting soil for the 2012 season was made today. The compost pile is used as a mixing base; sand, wood chips, coconut fiber, garden soil, is added and mixed thoroughly using the large rototiller and smaller tiller. The finished product is stored in plastic containers and will be utilized for the 2012 season. Quantities added is based on experience and is subjective to some degree.
Coconut fiber,recently available in my area, is used, since the sphagnum moss now sold is too fine and it doesn’t absorb water. Garden soil is added to get some microorganisms. Wood chips to give more fiber. Sand is to limit coagulation of the primary compost soil.