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Virtual Master Composter Course - City of San Diego (Tuesdays)

This event is currently full.
The five-week Master Composter course provides training in the art and science of composting. Course includes weekly webinar meetings with Q&A, an online course manual, take-home lectures, a curated Facebook group, and more!


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 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.
  • Discover a wealth of composting options for all needs. Course will cover backyard (traditional) composting, composting with worms (vermicomposting), bokashi fermenetation, 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 of the Miramar Greenery 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 - Nov. 10
  • Week 2 - Nov. 17
  • NO CLASS Nov. 24 (Thanksgiving week)
  • Week 3 - Dec. 1
  • Week 4 - Dec. 8
  • Week 5 - Dec. 15

If you are unable to make any of the classes, you are welcome to catch the presentation offered in the concurrent Saturday course.

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

Course Fee: $25*

City of San Diego residents will receive preferential registration. Non-City of San Diego residents will be placed on a wait list and apprised of space available status 1 week before the start of the course.

*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:

Event Classification
Funding Source Contract-funded
Category Master Composter Class
Contract San Diego City
Special Note
Stream to Volunteer Opportunities
November 10th, 2020 6:30 PM   through   December 15th, 2020 8:00 PM
Virtual - Your Home Computer
Phone: (760) 436-7986  ext. 700
City of San Diego Resident $ 25.00
Non-Resident of City of San Diego (waitlist) $ 0.00