The substrate in which mushrooms are grown contains pasteurized materials that include chicken manure, horse manure, hay, straw, peat moss, gypsum, corn cobs and other organic materials. These materials are ground, homogenized and sterilized, which makes them an ideal fertilizer and soil conditioner for vegetable gardens.
The sterilization of the mushroom compost after the mushrooms have grown creates a soil amendment that is pure and rich in nutrients making it a nutritious product for growing plants.
Vegetables benefit from the addition of mushroom compost mixed into existing soil or as a top dressing to be watered in.
Local gardening centers or mushroom farms offer mushroom compost for sale to the general public for use in vegetable gardening and it is purchased bagged or in bulk by the truck load.