What is spend mushroom compost?
This refers to the used growing medium that is produced from the commercial mushroom growing industry . It can also be referred to as spent mushroom substrate, mushroom soil, recycled mushroom compost , or simply mushroom compost. Call it whatever you would like, it all means the same thing. Mushroom compost is made of the following ingredients: Bulking Agents - The most common bulking agents are straw, hay, horse manure, corn cobs, and cottonseed hulls. If you notice, most of these bulking ingredients act as a significant carbon source for the composting process. Nitrogen Additives - These include poultry manure, corn cobs, cottonseed hulls, urea (synthetic), and blood meal. Other - Several other ingredients are necessary when making mushroom compost, including water, gypsum (a source of calcium and sulfur used to regulate pH levels), and recycled leachate from previous piles of compost (helps to re-capture lost nutrients and prevent runoff into nearby waterways). These ingr...