Master Gardener Program in King County

Thank you for your interest in the Master Gardener Program in King County. The WSU Master Gardener Program is dedicated to engaging university-trained volunteers to empower and sustain diverse communities with relevant, unbiased, research-based horticulture and environmental stewardship education. Read here about the WSU Extension Master Gardener Program Vision and Mission and goals for the program volunteers.

King County Master Gardener Intern Basic Training 2021.  Due to the impact of COVID-19, the Master Gardener Program of King County will not be conducting our usual annual training in 2021 for persons interested in becoming a Master Gardener.

Under usual circumstances the King County Master Gardener in-class training is held 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 are expected complete 40 hours of volunteer service in their first year. Every year thereafter Master Gardeners 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.

Find out more about what is involved in becoming a King County Master Gardener. For information and details about the program or training, contact the WSU Extension Master Gardener Program Office in King County, by phone, 206-543-0943, or via email,

Find out more about the WSU Extension Master Gardener Program.

Washington State University Extension Master Gardeners

WSU Master Gardeners make a difference:

•  Supporting local food banks by participating in our demonstration gardens.

•  Learning horticulture science that makes us the go-to resource to meet residents’ needs.

•  Teaching sustainable gardening in person in clinics and gardens and in classes face-to-face and online.

•  Sharing a gardening passion with the community.

•  Empowering extension clients to address landscaping and gardening challenges.

•  Practicing environmental responsibility.

•  Protecting water quality through the use of sustainable gardening practices.

•  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 July 2020

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