Ahoy! Schedules on holiday weeks are unchanged unless we emailed you otherwise. Please set out your bin on the same day. Thanks!
Photo: Sarah Wolfskehl
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About Black Earth Compost


Our mission is to nourish the soil to grow healthy plants in Massachusetts, with an emphasis on food production by any and all!  Made in small batches, our compost is without grass clippings but instead utilizes the riches of a bounty of food scraps.

Welcome to Spring 2022! 

Hello Composters, 
           We're now making compost at 3 locations in Massachusetts! Groton, Framingham and our home base in Manchester-by-the-Sea.  The Groton material is coming out great this year and will be serving most of the farms. In Manchester, we are officially building a new, state-of-the-art, indoor compost facility.  Thank you to everyone who provided support after the state grant money expired.  You will be proud of the facility.
           We have a new idea this year.  It is called 'June Compost for Yard Health'.  Concept is that you pre-order 1 yard of compost in April and May that will be delivered in June.  This allows us to plot a resource/energy efficient course through every one's neighborhood once, dropping off compost as we go. 

           In June use your 1 yard to...

  • Feed your perennials and trees
  • Feed areas of your lawn where you want lush green and/or wildflowers
  • Topdress your vegetables
  • Drawdown carbon
  • Improve property value

-Andrew Brousseau
Head Composter

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QUALITY COMMITMENT

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 
  • 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. Manchester, MA; Groton, MA; Framingham, MA

Tulips
strawberries
lettuce
beds
bags
seedlings
chives
pumpkin
eggplant
asparagus
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Winner! Best Vegetable Garden

Charlie Perlo is a five year Black Earth Customer and two time winner of the Friendly Garden Club of Beverly's Best of Beverly Contest for Medium Size Vegetable Garden.

QUALITY ASSURANCE

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, fava beans and clover in our compost in a controlled plant. 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 over the long term fungal populations establish.  Our compost is great for making compost tea. 

Email BulkSales@BlackEarthCompost.com 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
2022 Compost
2022 Compost
2022 Compost 2022 FSMA Report for Farmers
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 2021 chart shows the content of fluorinated compounds found in our compost compared to state thresholds. 

HOW WE MAKE COMPOST

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Building Community Food Projects

In 2020-2022 we proudly supported the following community food initiatives with raised beds or finished compost.

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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 2020-2022. 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