California’s Premium Compost and Mulch Supplier

Our commitment to sustainability and extensive infrastructure ensures customers get the quality products they need for healthy, optimal growth.

Growing Better Communities

Jason Mraz joined Connor McClelland, WM's full-time agronomist, to see how WM transforms recycled yard and food waste into nutrient‑rich compost that strengthens local soils and supports our communities. Watch how our science‑driven composting helps growers, neighborhoods, and the environment thrive.

Compost and Mulch Products

WM is the leading provider of composted soil amendment and mulch products in California, managing over 1.4 million tons of organics each year. With 13 facilities located statewide, California’s landscape and agricultural communities can confidently rely on WM organics for high-quality, nutrient-rich products that are available for delivery or pickup.

In addition, our vertical integration within the industry allows WM to reliably provide jurisdictions with premium, sustainable products needed to meet the regulatory procurement targets outlined by SB 1383.

Compost Locations

Our facilities provide premium compost, mulch, and custom blends, in addition to chip and grind and organics processing. Products vary by location.
Northern California

1. Anderson Compost Facility,* Anderson

2. Redwood Compost Facility,* Novato

3. Davis Street Compost Facility,* San Leandro

4. Altamont Compost Facility,* Livermore

5. Central Valley Compost Facility,* Lathrop

Southern California

6. South Valley Compost Facility,* Tulare

7. North SLO County Compost Facility,* Paso Robles

8. Simi Valley LF & Recycling Center (Mulch), Simi Valley

9. Sun Valley Recycle Park (Mulch), Sun Valley

10. Azusa Transfer & Recycling Facility, Azusa

11. El Corazon Compost Facility,* Oceanside

12. Pala Compost Facility,* Pala

13. Otay Mesa Compost Facility,* San Diego

* Locations that provide compost and soil amendment products for sale.

Certified Compost

Many of our products offer the following certifications and registrations. Please contact us to find the right product for you.

CDFA Organic

OMRI Listed

STA Certified

Quality and Reliability

Whether you are a landscape architect, landscaper, farmer, grower, jurisdiction or homeowner we have the right product for you.

Our expert team provides our customers with premium compost, compost blends, bulk quantities of mulch, composted mulch, as well as landscaping and bioswale products.

Community

WM is committed to giving back to the communities we serve through the support and sponsorship of many local organizations.

We are involved with a number of community projects and provide compost donations to various locations throughout California.

Contact WM today.

Get pricing, place an order or request more information.