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Virtual Master Composter Course - City of San Diego

 Registration is closed for this event
The five-week Master Composter course provides training in the art and science of composting. Course includes weekly webinar meetings with Q&A, take-home lectures, a curated Facebook group, and more! Priority registration for this course will be offered to residents of the City of San Diego.


Become a Master Composter!

  • Minimize your carbon footprint by keeping food and yard waste out of the landfill, helping reduce harmful methane gas emissions.
  • Use your "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.
  • Discover a wealth of composting options for all needs. Course will cover backyard (traditional) composting, composting with worms (vermicomposting), bokashi fermentation, and an array of associated sub-topics.

Virtual Course Format

  • Instruction will take place through a combination of live meetings with our instructors held through Zoom, and independent study.
  • Virtual, 1.5-hour weekly meetings will include dedicated Q&A time and live lectures from our instructors. 
  • Independent study will consist of assigned readings from our online course manual, pre-taped presentations from our instructors and guest speakers, and more!
  • We will offer a virtual field trip to observe a large-scale composting operation in action.
  • An optional curated Facebook group to share with and learn from others.

This class will meet Tuesdays from 6:30 - 8 PM

  • Week 1 - Sep. 28
  • Week 2 - Oct. 5
  • Week 3 - Oct. 12
  • Week 4 - Oct. 19
  • Week 5 - Oct. 26

Master Composter certification requires attendance at all 5 classes, as well as 30 volunteer hours of related community service. Community service opportunities, including virtual and in-person options, will be discussed during the course.

Course Fee: $25*‚Äč

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

Made possible through generous funding by


Event Classification
Funding Source
Category Master Composter Class
Contract San Diego City
Special Note
Stream to Volunteer Opportunities
September 28th, 2021 6:30 PM   through   October 26th, 2021 8:00 PM
Virtual - Anywhere In the World
Main Phone: (760)436-7986  ext. 700
City of San Diego Resident 25.000000000
Non-Resident of City of San Diego (waitlist) 0.000000000

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