Snow Alert: Due to the forecasted storm Saturday 1/29/22, all scheduled Saturday routes will be adjusted. An email will be sent with your new pick up day.

Covid-19: with the level of cases circulating right now you may experience a last minute schedule change. If your pick-up is affected we will reach out via email.

Photo: Sarah Wolfskehl

Black Earth Compost

Made in small batches with integrity and commitment to community and nutrient balance.

100% Black Earth Compost

Our mission is to nourish the soil to grow healthy plants in Massachusetts, with an emphasis on food; in your backyard, community garden or farm, to encourage full circle sustainability.  Through our FarmWorks program, more than 10 cents of every bag of compost sold puts our compost to work on small MA vegetable farms. Your flowers and lawn will love us too!

Our compost is made without herbicides, pesticides, and fertilizers so you will feel comfortable growing food for your family. 



Our compost is rich in humus, nurtures beneficial micro-organisms, is free of any viable weed seeds, and contains an abundance of immediate and slow release nutrients.

  • A Broad Range of Ingredients to support a bio-diverse compost
  • No Grass Clippings that contain herbicides, pesticides, and insecticides
  • Free of Weed Seeds
  • Lab tested for optimal composition (scroll down for details)
  • Screened to 5/8ths inch so the compost works in household and commercial compost spreaders
  • Some plastic such as fruit stickers and wrap are in the compost because we are sourcing the food scraps from the community 
  • Made in MA! Our compost sites serve as local sources of nutrients, making our state more resilient


Lab Analysis - We have our compost tested at University of Maine each year for nutrients, pH, salts and C:N ratio. Additionally we test it for heavy metals (lead, nickel, cadmium, chromium, zinc, copper, and arsenic).

Plant Trials - We believe that plants don’t lie, and we know that analytical reports from laboratories won’t tell the whole story. That’s why we grow vegetables, clover and fava beans in our compost. Clover and fava beans for the presence of persistent herbicides, using published bioassay protocols, and vegetables to show general vigor as they are heavy feeders.

BiologyWe test the compost for communities of bacteria, fungus, protoctist and nematodes. We tend to be a bacterial dominated compost, but our long curing times allow fungal populations to establish.  Our compost is great for making compost tea. 

Email or call 978-290-4610 ext. 3 if you have questions.

A note on pH: Compost normally shows pH 7 to 8 if it is rich in nutrients (especially for food scrap composts). This does not mean that it is going to dramatically send your soil’s pH sky high. The high pH of compost is attributed to the initial pool of 'ready to go' soluble nutrients. After that, the pH comes down to between pH 6 to 7. The compost will continue to release nutrients as the organic matter decomposes over the season.

Nutrient Lab Test Herbicide Trials Food Web Test Food Safety
Modernization Act
2021 Compost
2021 Soil
2021 Soil - 1
2021 Compost - 1
2021 Compost - 2
2021 Compost - 3
2021 Compost 2021 FMSA Report for Farms
2020 Compost
2020 Soil
Not documented 2020 Compost
2020 FSMA Report for Farms
2019 Compost
2019 Soil
Not documented 2019 Compost -Last year of no FSMA law
for small veg growers-

Heavy Metals: This graph shows metal content found in our compost and soil blend compared to state thresholds.  

PFAS: This chart shows the content of fluorinated compounds found in our compost compared to state thresholds.



Building Community Food Projects

In 2020/2021 we proudly supported the following community food initiatives with raised beds or finished compost.


Supporting Local Farms With FarmWorks

With the support of our customers, we were able to offer compost at a reduced rate to the local farms listed below in 2020/2021. 10 cents of each bag of compost sold goes to our FarmWorks program. Join a Community Supported Agriculture (CSA) program at one of these farms or buy their produce to complete the full circle sustainability loop.  

'The Great Suburban Drawdown Challenge'

Join the global effort happening right now to drawdown carbon from the atmosphere to fight climate change by adding compost to your yard.  Compost helps sequester C02 from the atmosphere by nourishing your soil and plants, which fix CO2 into stable forms stored in the soil long term. Adding compost to your soil has been proven to increase carbon sequestration in soil. (Kerline, 2019) 

In the Fall we offer a Special, "Compost for Carbon Drawdown," which is a fine compost, screened to 1/2 inch that is easy to spread for topdressing your lawn, trees or garden beds. 

Yard benefits
- Nourish your trees (healthy trees live longer)
- Nourish your lawn (great time to seed also!) 
- Less watering needed

If 7 home owners were to spread just 1/2 inch of compost over their lawn, it would be enough to drawdown nearly one metric ton of CO2 emissions over a span of 3 years. (Ryles, 2013)

Order 1 or more cubic yards for free delivery the 1st and 2nd week of October. By consolidating deliveries to this period we are able to offer this product at a lower price. Available in select locations. Delivery fee applies in some towns.

There are more ways to drawdown carbon within your yard. Check out our Great Suburban Drawdown challenge for more tips and strategies for going carbon neutral. 

Order 'Compost for Carbon Drawdown'The Great Suburban Drawdown Challenge