Org-Gyp compost blend (also referred to as “mushroom compost”, “spent mushroom substrate” or “mushroom soil”) has become a popular organic soil amendment for the establishment and maintenance of lawns and sports fields, gardens, agricultural and horticultural crops and with land reclamation projects.

Mushroom compost is a viable and useful by-product of mushroom farming. Those edible mushrooms found in the produce section of your grocery store are grown in a specific medium. This growth media is a mixture of agricultural materials, such as straw from horse stables, hay, poultry litter, ground corn cobs, cottonseed hulls, cocoa shells, peat moss, gypsum and other natural organic substances. These products are blended and composted in a very controlled manner to make a rich organic media that serves as the nutrient source for mushrooms. After the mushroom crop is harvested, this organic material is removed from the production house, where it is now called “spent mushroom compost.”