A few practical tips on Phase I and Phase II substrate (compost), and the substrate preparation (composting) process, and formulating mushroom compost.
To begin a review about Phase II composting first we should think about the organism we are trying to grow and why it has such a finicky food source.
Growers must use the mushroom's ability to consume organic materials discarded by man, to help control pollution in modern society.
Spent mushroom substrate is the soil-like material remaining after a crop of mushrooms. Spent substrate is high in organic matter making it desirable for use as a soil amendment or soil conditioner.