Cedar Grove Products

Aged Organic Compost

- Helps plants to more effectively utilize nutrients
- Made from locally recycled yard and garden debris, food products, vegetable trimmings and approved compostable packaging
- Tested at third party laboratories to ensure compliance with US Composting council to ensure compliance with regulations

Registered Organic Compost

- Registered for use in Organic Agriculture by the Washington State Department of Agriculture
- Made from locally recycled yard and garden debris, food products and vegetable trimmings
- Tested at third party laboratories to ensure compliance with US Composting council to ensure compliance with regulations

- Multiple financing options available
- Spreader available - holds approximately 20 cubic yards per load

All tests performed by Soil Control Laboratories, Watsonville, CA; using TMECC/STA specified methods.

Washington State University: Compost in Agriculture

The Compost Outreach Project provides Snohomish and King County farmers with an opportunity to see first-hand the benefits of incorporating compost into their cropping systems. Our on-farm research is helping document the value of using compost in local cropping systems, and create a sustainable system for returning urban landscape and food waste energy to local farms.

Learn more about the WSU Extension compost studies here

Soils for Salmon: The Urban Environment - Why Build Healthy Soil?

Soil performs valuable functions: nourishing plants, absorbing and cleaning stormwater. These functions are often degraded during development when soil is removed or compacted. Restoring healthy soil is essential to protecting our waterways and salmon, and our way of life in the Puget Sound region.

Compost amendment restarts the soil ecosystem – restoring functions in soils disturbed during development. Tilling in compost immediately reduces soil compaction and increases stormwater infiltration rates. The compost feeds and creates habitat for beneficial soil organisms – restoring the ecosystem in degraded soils, so they begin to function again more like native soils.

Click here to learn more about the numerous benefits of healthy soil

Waste and Resources Action Programme

WRAP's mission is to accelerate the move to a sustainable, resource-efficient economy by:

re-inventing how we design, produce and sell products,
re-thinking how we use and consume products, and
re-defining what is possible through re-use and recycling

Learn more about the ways to reduce food waste and "close the loop" by contributing to composting here.

The Soil Story

"Scientist have recently discovered that applying a thin layer of compost sets up an ongoing positive feedback loop that brings more and more carbon into the soil each year."

Kiss the Ground, an organization commited to battling climate change, tells us how compost plays a major role in environmental responsibility. Watch The Soil Story here and learn more.

Seeing is Believing: Product Testimonials

“We had earlier emergence of pumpkin plants. They were healthier, they grew faster and with the rapid (leaf) canopy that was established, it really helped with weed control. And we got better pumpkins and more of them.”
- Reid Carleton of Carleton Farms

“Everything grew taller and greener. Broccoli heads and side shoots were twice as big as those on plants without the compost added.”
- Dana Young of Lucky Dove Farm

Compost Trials: 59 Farm Case Studies

Cedar Grove partnered with Washington State University Snohomish County Extension to conduct compost trails with local farms. The trails conducted showed significant improvements in crop yields after the application of Cedar Grove Compost.

"With the potential to increase production of some specialty crops by 20 percent, this could have a significant economic impact on Washington's specialty crop industry," said Andrew Corbin, Extension agriculture and natural resources educator.

Crops participating in the trials included blueberries, raspberries, blackberries, hazelnuts, potatoes, hay, haylage, pasture grass, broccoli, lettuce, flowers (multiple species), pumpkins, turf grass, field corn, sweet corn, nursery and orchard trees, and more.

- 57% saw Greatly Improved or Improved effects on crop production

- 69% saw Improved effects on soil quality

- 100% increase in Triticale yield

- 20% increase in Pumpkin yield

- 24% increase in weight of Sweet Corn


Scientifically Verified Benefits of Cedar Grove Compost

Compost supplies quick and slow release nutrients, beneficial soil life, and organic matter that stores nutrients and moisture—in a single economical application!

Cedar Grove Compost is hot composted to destroy weed seeds and pathogens, aged and screened to produce a uniform easy-to-handle amendment.

- Improves soil structure for better root growth, reduced erosion and runoff

- Increases moisture infiltration

- Improves water retention

- Supplies and supports beneficial microorganisms in soils

- Improves nutrient retention

- Helps plants to more effectively utilize nutrients

- Buffers soil pH

- Binds and degrades pollutants


Working With Farmers on Sustainable Communities

Cedar Grove started the compost market in the Pacific Northwest in the 1980s. Since then, we have been continually evolving our operations to produce a high quality, consistent compost. We utilize a highly controlled scientific process including controlled aeration, temperature monitoring, curing and screening.

Our finished compost is sent to third party laboratories to guarantee that our product meets all standards. Cedar Grove, in compliance with the US Composting Council Seal of Testing, tests our compost prior to sale to ensure compliance with regulations.

Committed to the Puget Sound

Cedar Grove is committed to preserving the Puget Sound and surrounding waterways by working with local municipalities, cities, residents, gardeners, watershed groups, associations and farming communities to improve our environment with compost. Cedar Grove continues to provide leadership and outreach to pioneer programs that allow the local region to evolve toward healthy, sustainable practices.

Contact us at (206) 491-5427 or by email at for more information.

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