Magic Mushroom CompostMushroom compost really is magic for your garden because it is filled with mycelium, the underground fungal web that helps plants absorb nutrients and communicate with other plants. Improves soil structure Promotes vigorous root growth and nutrient uptake Loosens and aerates heavy soils while helping sandy soils retain moisture This compost is a by product of edible mushroom farming and doesn't contain actual magic, mushrooms, or magic mushrooms.