Fresh mushroom compost contains soluble concentrated salts that can damage seeds, young plants and salt-sensitive plants. It should be bought in the fall and left uncovered over the winter to age or cure. You can also mix fresh mushroom compost with soil before spreading it around your plants.
About this Author
Melody Lee worked as a newspaper reporter, copywriter and editor for 5 years. In addition, she has edited magazine articles and books. Lee holds a degree in landscape design and is a Florida master gardener. She has more than 25 years of gardening experience, which includes working at nurseries and greenhouses.