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At River Valley Ranch, we produce high-quality organic mushroom compost that is perfect for enriching soil and promoting plant growth.

Mushroom compost, also known as spent mushroom substrate, is the byproduct of the mushroom growing process. River Valley Ranch's mushroom compost is comprised of 80% composted stable bedding and 20% Canadian sphagnum peat moss. Its pH level is about 6.3, and it also contains nitrogen (about 2.5%) and calcium. Our compost is pasteurized, weed-free, and high in organic matter.

Benefits of Using River Valley Ranch Mushroom Compost

Adding mushroom compost to the soil is known to improve soil structure, tilth, water holding capacity, and overall plant health. Perhaps its greatest benefit to the soil is that the compost increases the soil's microbial activity for healthier root development. When tilled into heavy clay soil, it can help loosen the soil and when tilled in sandy soil, it can aid in moisture retention. Applying it as a mulch (2-3 inches thick) keeps new plantings cool, conserves water, and improves soil biology, as well as limiting weed growth.

How to Use Organic Mushroom Compost

Our compost is available in both bagged and bulk form. One bag of compost covers approximately 10 square feet, 2-3 inches deep. For bulk purchases, one cubic yard covers 100-120 feet, 3 inches deep. When using our compost as a mulch, we recommend applying it 2-3 inches thick for best results.

If you're looking to boost your garden's health and promote plant growth, River Valley Ranch's mushroom compost is an excellent choice. Come visit us at our farm store in Wisconsin or give us a call to learn more about how our compost can benefit your garden!

Our compost(aka spent mushroom substrate) is comprised of 80%
composted stable bedding and 20% Canadian sphagnum peat moss. pH level
is about 6.3, and also contains Nitrogen ( about 2.5% ) and calcium. It is the
end  of the mushroom crop and is pasteurized and weed free and high
in organic matter. By adding organic matter to the soil; soil structure, tilth,
water holding capacity and plant health are improved. Its biggest
contribution is to improve and to increase soils microbial activity for
healthier root development. When it is tilled into heavy clay soil it helps
loosen the soil, when tilled into sandy soil it aids in moisture retention.
Applying it 2-3 inches thick will give best results as a mulch.
Keeps new plantings cool, conserve water, improves soil biology.
One bag=1 ¼ bushels and cover approx.10 square feet, 2-3 inches deep.

Price per bag $7.00

Also available in bulk. One cubic yard covers 100-120 feet, 3 inches deep.
Price per cubic yard $50.00. We load with loader bulk compost into your
truck or trailer, Saturdays only 9am –2 p.m weather permitting. Call

Saturday’s for availability.

Self loading only of bagged or bulk compost.

At River Valley Ranch, we are committed to providing our customers with the freshest, locally-produced mushrooms and handcrafted foods. While our retail store in the Ravenswood neighborhood of Chicago is closing its doors, we are excited to announce that there are still plenty of ways for you to find our products.

As some of you may know, our retail store in the Ravenswood neighborhood of Chicago, River Valley Market, will be closing its doors. This decision was not made lightly and we are deeply grateful for the support and loyalty you all have shown us over the years. December 31, 2022 is the store's final day of operations.