Wholesale Organic Spent Mushroom Compost
Certified Organic Spent Mushroom Compost for California Businesses
Revitalize Your Soil
Certified Organic Spent Mushroom Compost (COSMC) is a premium, nutrient-rich soil amendment designed to improve soil health, fertility, and structure across a wide range of crops and landscapes.
This organic compost is a finely balanced mixture of straw, peat moss, cottonseed meal, mined gypsum, mined lime, and other natural ingredients.
Key benefits include:
- Improves Soil Composition: Loosens heavy soils and enhances aeration while helping sandy soils retain moisture.
- Boosts Fertility Naturally: Provides humus, organic matter, and light fertilization to support vigorous plant growth.
- Enhances Water Efficiency: Increases water-holding capacity, reducing the need for frequent irrigation.
- pH Balancing: With a natural pH in the range of around 8.0–8.3, Mushroom Compost can help neutralize acidic soils and serve as a sustainable alternative to lime.
- Versatile Use: Ideal for amending planting beds, vegetable gardens, topdressing lawns, and as a sustainable alternative to synthetic fertilizers.
If You're a Business, Contact Us Today
Certified Organic Spent Mushroom Compost is available wholesale to businesses by the cubic yard.
What Our Users Have To Say
About Our Products
At Keith Day Gabilan Ag Services, we’ve been helping Salinas Valley farmers care for their soil since 2002. We proudly incorporate certified organic spent mushroom compost from Monterey Mushrooms into our custom compost blends because it naturally improves soil health, boosts moisture retention, and supports strong plant growth. Whether you’re managing orchards or vineyards, or maintaining landscapes, our compost recipes provide consistent quality and sustainable results for every grower.
Keith Day
Owner
Keith Day Gabilan Ag Services
