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

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


 If you are having trouble registering for this Master Composter course, please contact us at or at (760)436-7986x700

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 5:00 PM
Ridgehaven Green Building
9601 Ridgehaven Court
San Diego, CA 92123
United States
Main Phone: (760) 436-7986  ext. 700
Email: Email:
City of San Diego Resident $ 25.00
Non-Resident of City of San Diego (waitlist) $ 0.00