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Master Composter Course - City of San Diego (Five Week Course)

The five-week Master Composter course provides training in the art and science of composting.

Learn the art and science of composting!

  • Minimize your carbon footprint by keeping food and yard waste out of the landfill, helping reduce harmful methane gas emissions.
  • Use this "waste" to create a nutrient rich amendment for your garden. Compost use reduces the need for synthetic fertilizers and pesticides. 
  • Reduce water use and increase water retention. Compost increases your soil's water holding capacity by up to 7 times and retains water for up to 7 days.
  • Work with a team to build, maintain and troubleshoot a traditional compost pile. Course will also cover composting with worms (vermicomposting) and compost fermentation (Bokashi).

Course includes lectures, demonstrations, and a field trip. Teams will work together to build, maintain, and troubleshoot their own traditional compost bins. 

Master Composter certification requires attendance at 4 out of 5 classes, as well as 30 volunteer hours of related community service.

This 5-week course will meet at the Ridgehaven "Green Building" every TUESDAY evening.

Tuesday March 12, 2019 from 5:00-8:00 PM.
Tuesday March 19, 2019 from 5:00-8:00 PM
Tuesday March 26, 2019 from 5:00-8:00 PM
Tuesday April 2, 2019 from 5:00-8:00 PM
Tuesday April 9, 2019 from 5:00-8:00 PM


Course Fee: $25*. City of San Diego residents receive preferential registration. 
Non-residents will be placed on a waitlist; registration will open 1 to 2 weeks before the start of the course, and is contingent on space available.

​*If the fee presents a financial hardship, please contact Diane Hazard at to apply for a scholarship.  


This course has been made possible through generous funding by:

Thanks to our site provider, the City of San Diego.

Event Classification
Funding Source Contract-funded
Category Master Composter Class
Contract San Diego City
Special Note
Stream to Volunteer Opportunities
March 12th, 2019 5:00 PM   through   April 9th, 2019 8:00 PM
Ridgehaven Green Building
9601 Ridgehaven Court
San Diego, CA 92123
United States

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Main Phone: (760) 436-7986  ext. 700
City of San Diego Resident $ 25.00
Non-Resident of City of San Diego (waitlist) $ 0.00