Earth Right’s Mushroom Stuff Liquid Fermented Mushroom For Serious Gardeners Rose and Peony Growers and Occasionally for the Lawn. Enhance the growth and health of all plants and vegetables by giving them natural nutrients including the benefits from liquid mushroom. Liquid mushroom is made from fermented Reishi, Oyster, and other varieties. The Mushroom Stuff reestablishes the appropriate mycelium on the root hairs of the capillaries, so that plants of all types might be able to better utilize the nutrients provided. These mycelium are frequently “killed off” by chemicals, compaction, and disease. You may have heard of that saying, “don’t burn the roots.”If you have, the reference means that the chemicals that were put down damaged these microscopic root hairs.