Master Gardener Program in King County

Thank you for your interest in the Master Gardener Program in King County. Read here about the WSU Extension Master Gardener Program Vision and Mission and goals for the program volunteers.

The applications for the 2021 Master Gardener training class will be available online August 1, 2020.  Download this brochure for more details.

In King County, Master Gardener in-class training is held one day a week on Saturday for 12 consecutive weeks from mid-January through March. Course work is done both online and in class. High-speed access to the internet and an email address are required. Trainees are expected to attend all training sessions. There is a cost for training  and financial assistance is available. You do not need extensive horticulture knowledge to be accepted into the class. We do, however, look for applicants who have a history of volunteerism.

Master Gardener trainees must complete 40 hours of volunteer service in their first year. Every year the Master Gardener must submit a recertification request and complete 25 hours of volunteer service and 10 hours of continuing education in that year to maintain veteran status. Most volunteer activities take place on weekends from spring to early fall.

Become a King County Master Gardener. For more information and details contact the Master Gardener Program Coordinator in King County, by phone, 206-543-0943, or via email,

Find out more about the King County Extension Master Gardener Program.

Washington State University Extension Master Gardeners
The WSU Master Gardener Program is dedicated to facilitating excellence in volunteers through education, life-long learning, and professionalism of coordinators and volunteers.


WSU Master Gardeners make a difference:

•  Supporting local food banks

•  Learning horticulture science

•  Teaching sustainable gardening

•  Sharing a gardening passion with the community

•  Empowering extension clients to address landscaping and gardening challenges

•  Practicing environmental responsibility

•  Protecting water quality

•  Reduce fertilizer and pesticide pollutants

Master Gardener Foundation of King County

Join 700 King County residents who serve as Master Gardener volunteers and make a difference, Become a Master Gardener.

Last updated April 2020

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