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  Sonoma Compost Co. is proud to present one of the most diverse product lines in the industry. Each product is designed to meet the needs of agrarians, landscapers and the backyard gardener. Please, browse this page to select the product that works best for your soil, your plants and you. Of course, our knowledgeable staff is happy to assist you in deciding which product best suits your needs (707 664 9113).

Click on products below to see more detail

Sonoma Compost

Organic Hi-Test Compost

Mallard Plus

Biodynamic Composts

Vineyard Mulch

Path Mulch

Feather-Lite Amended Soil

Compost/Mined Lime Blends

Deck Mix

Sonoma Compost (Organic)
Sonoma CompostDark, rich, premium quality compost made from recycled yard trimmings and vegetal food waste. Sonoma Compost is recommended for applications that do not require high nitrogen content such as trees, shrubs, grape vines and natives.
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Provides valuable organic matter to soil, making it easier to work and more productive. In sandy soil it increases moisture-holding capacity, making soil nutrients more available to plants. In heavy clay soils, porosity is increased which improves aeration in the root zone and overall drainage.

Sonoma Compost provides a wealth of slow release nutrients and beneficial microbes to your soil and plants. It's screened to approximately <1/2".

Sonoma Compost is lab tested, and listed by the Organic Materials Review Institute (OMRI) for use in organic production.

Quantity Price
1-12 Cubic Yards $16.00/Cubic Yard
13-24 Cubic Yards $15.50/Cubic Yard
25-100 Cubic Yards $15.00/Cubic Yard
101-250 Cubic Yards $14.00/Cubic Yard
251-500 Cubic Yards $13.00/Cubic Yard
501+ Cubic Yards $12.00/Cubic Yard

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Organic Hi-Test Compost
Organic Hi-Test CompostAll the benefits of Sonoma Compost but with higher nitrogen content from the inclusion of chicken feathers.
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Sonoma Organic HI-TEST is great for new gardens and landscapes, especially where soils have been neglected or overworked. In addition to improving soil structure, our HI-TEST Compost will give new plants the nitrogen needed for a vibrant start.

It's an excellent long-term soil conditioner for the heavy clay soils in Santa Rosa, Rohnert Park and Petaluma and will add moisture-holding capacity to sandy West County soils. It’s screened to approximately <½”.

Sonoma Organic HI-TEST is listed by the Organic Materials Review Institute (OMRI) for use in organic production.

Quantity Price
1-12 Cubic Yards $19.00/Cubic Yard
13-24 Cubic Yards $18.00/Cubic Yard
25-100 Cubic Yards $17.00/Cubic Yard
101-250 Cubic Yards $16.00/Cubic Yard
251-500 Cubic Yards $15.00/Cubic Yard
501+ Cubic Yards $14.00/Cubic Yard

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Mallard Plus
Mallard PlusAlthough our Mallard Mulch (a blend of Sonoma Compost & Brown Rice) has been getting rave reviews for years, we’ve improved it and changed its name to Mallard Plus.
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We’re blending our Brown Rice with our Sonoma HI-TEST Compost. The nitrogen rich chicken feathers in the HI-TEST will make a noticeable difference in your garden’s performance.

This premium quality amendment provides all the soil conditioning benefits of good compost, a higher nutrient content, and has a neat, uniform appearance. It's the perfect material for making heavy clay soils easier to work and more productive. Better yet, it’s light and easy to move around your garden or landscape.

Mallard Plus is listed by the Organic Materials Review Institute (OMRI) for use in organic production.

Quantity (Screened) Price
1-12 Cubic Yards $22.00/Cubic Yard
13-24 Cubic Yards $21.00/Cubic Yard
25-100 Cubic Yards $20.00/Cubic Yard
101-250 Cubic Yards $19.00/Cubic Yard
251-500 Cubic Yards $18.50/Cubic Yard
501+ Cubic Yards $18.00/Cubic Yard

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Biodynamic Composts
Sonoma Compost has developed two Biodynamic Composts analogous to Sonoma Compost and Organic Hi-Test Compost, but they have been prepared using biodynamic preparations. Initially a biodynamic Starter Compound is sprayed on the compost, which is then composted in windrows for about 6 weeks. Our finished Biodynamic Compost is then placed in a static pile where the preparations 502-507 are applied in designated locations. The compost is cured for at least 4 months. The preparations are intended to help moderate and regulate biological processes as well as enhance and strengthen the life (etheric) forces on the farm. The preparations are used in homeopathic quantities. This dark, well decomposed compost is ideal for grape growing, fruit trees, shrubs, natives and other plants that require low nitrogen.

Sonoma Biodynamic Compost
Quantity (Screened) Price
1-12 Cubic Yards $36.00/Cubic Yard
13-24 Cubic Yards $35.50/Cubic Yard

Biodynamic Hi-Test Compost
Quantity (Screened) Price
1-12 Cubic Yards $39.00/Cubic Yard
13-24 Cubic Yards $38.50/Cubic Yard

Traditionally Biodynamic compost is made on the farm.. We do provide small amounts of Biodynamic Composts on a retail basis, however for any larger quatities the compost is cured in location at the end-user. Our pricing reflects two options of curing. You can purchase and apply the Biodynamic Preparations yourself or we can manage this for you. Please click here to view the full pricing chart for Biodynamic Compost.

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Vineyard Mulch, Screened (Organic)
Vineyard MulchAn affordable, organic alternative to expensive bark products, Screened Vineyard Mulch provides great background color and texture in landscaping applications. It suppresses weeds, conserves moisture, moderates soil temperatures, and controls erosion.
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Vineyard Mulch undergoes a brief composting process at over 131°F that renders it virtually free of weed seeds and plant pathogens. As it slowly breaks down, it provides the organic matter, nutrients and microbes that help plants thrive.

Worms thrive in soils that have a generous layer of Vineyard Mulch. Their tunneling activities allow oxygen to get to plant roots and their castings provide a beneficial nutrient input.

Fungi are prolific in mulches since they are working hard to break this material down. This fungal activity plays a crucial role in improving soil structure by aggregating the soil. Occasionally, during the wet season, these fungi make their presence known by producing fruiting bodies: mushrooms. This a natural occurance, inherent to decomposition. For those who do not appreciate those 'guests' can simple rake the mushrooms and they will disappear rapidly.

Vineyard Mulch is ideal for the demanding needs of North Coast grape growers. It's particularly suited for use on steep, hillside vineyards and when properly applied will reduce soil loss from erosion by up to 95%. It's easily applied by hand or with a tractor pulled spreader.

Vineyard Mulch is listed by the Organic Materials Review Institute (OMRI) for use in organic production.

Quantity (Screened) Price
1-12 Cubic Yards $14.00/Cubic Yard
13-24 Cubic Yards $13.00/Cubic Yard
25-100 Cubic Yards $12.00/Cubic Yard
101-250 Cubic Yards $11.50/Cubic Yard
251-500 Cubic Yards $11.00/Cubic Yard
501+ Cubic Yards $10.00/Cubic Yard

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Path Mulch
Path MulchThe economic, environment friendly substitute for expensive landscape barks. Made from recycled wood that’s ground and screened, Path Mulch is long-lasting walk-on mulch that will suppress weeds, conserve moisture and keep dirt and mud out of your house. It has a texture and color that work well with vivid garden colors. Landscapers specify Path Mulch when a neat appearance or distinctive border is desired.
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Being made from recycled wood, even though we have an aggressive metal removal program, Path Mulch may contain an incidental number of nails. Recycled wood includes OSB and plywood. No pressure treated and painted wood is allowed. Please use in appropriate applications.

Quantity (Screened) Price
1-12 Cubic Yards $8.50/Cubic Yard
13-24 Cubic Yards $8.25/Cubic Yard
25-100 Cubic Yards $8.00/Cubic Yard
101-250 Cubic Yards $7.75/Cubic Yard
251-500 Cubic Yards $7.50/Cubic Yard
501+ Cubic Yards $7.25/Cubic Yard

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Feather_Lite Amended Soil (Organic)
Feather-Lite Amended SoilPlant directly into Sonoma Feather-Lite Amended Soil. It's great for filling raised beds, replacing poor quality soil, adding elevation or leveling a project site, or filling in behind a retaining wall.
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Sonoma Feather-Lite is a good looking blend of 50 % clean soil and 50% Mallard Plus. You’ll find the high mineral content of the soil, and the rice hulls in the Mallard Plus, make for a growing medium that will last longer and decompose less than materials comprised of all organic matter. The feather component in the Mallard Plus provides the nitrogen boost to get plants and turf growing to your expectations.

Sonoma Feather-Lite Amended Soil is listed by the Organic Materials Review Institute (OMRI) for use in organic production.

Quantity (Screened) Price
1-12 Cubic Yards $28.00/Cubic Yard
13-24 Cubic Yards $27.50/Cubic Yard
25-100 Cubic Yards $27.00/Cubic Yard
101-250 Cubic Yards $26.50/Cubic Yard
251-500 Cubic Yards $26.00/Cubic Yard
501+ Cubic Yards $25.50/Cubic Yard

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Compost/Mined Lime Blends
All the advantages of our OMRI listed organic compost combined with the additional benefits of an OMRI listed mined limestone. The lime contains calcium, essential to making nutrients such as nitrogen, phosphorous and potassium available to plants. In addition, lime will correct acid soil conditions, which are common in high rainfall regions such as Sonoma County.

Compost and lime have been used for years by grape growers, organic farmers and backyard gardeners. By blending them, we make these two essential growing tools more convenient and easier to use.

Our compost/mined lime product is custom-blended in the specific ratios you require. Please order at least two weeks before needed. Truckload quantities only, please. Call for pricing.

Note: We can custom blend other minerals, such as oyster shell calcium, or gypsum with Sonoma Compost, our HI-TEST Compost or our Mallard Plus as well.
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Deck Mix
The ultimate affordable soil amendment, Deck Mix is a blend of all our products that occurs when we sweep our loading area. You'll find Sonoma Compost, Organic Hi-Test Compost, Mallard Plus, Feather-Lite Amended Soil, Vineyard Mulch and Path Mulch in this blend. Use Deck Mix as a mulch or amendment for flowers, shrubs and other ornamentals. Great as a tree mulch too!

Not recommended for veggies. Available from our retail site only as available, no reservations accepted. Supply is limited.

Price: $5.00/Cubic Yard


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Sonoma Compost - 550 Mecham Road, Petaluma, CA 94952
Phone: 707.664.9113; Fax: 707.664.1943; office@sonomacompost.com
Hours: Monday - Saturday 7 a.m. to 3 p.m. Sundays - Closed