The WSU Extension King County Master Gardener Program
Welcome to the WSU Extension King County Master Gardener Program
Are you interested in enrolling in the Washington State Green School?
Learn the science of sustainable gardening. Join Washington Green School to expand your gardening knowledge and explore growing your own food, soil science, pest management, climate resilience, pollinators, and find out about all the benefits that consumer horticulture has on individuals, families and communities.
Washington Gardener Certificate Registration is now open!
Registration is open from August 17 through September 30, 2026. Visit the Washington Gardener Certificate website to find information about the Washington Gardener Certificate program and class schedule. In order to learn about and complete the registration, there are several pages to visit. Depending on what you are looking for, here are the links to relevant pages:
- Washington Green School – general information
- Registration Main Page – with discounts for WSU staff and volunteers
- Registration Guide – how to fill out the registration form
- Registration Form – the actual registration form
WSU King County Master Gardener Intern applications are closed for this year. Check back next year when applications are scheduled to open again around June.
More Information
What we do:
Each year we train new volunteers, equipping them with foundational knowledge to become horticultural educators in their communities. Trained volunteers must continue their volunteer and educational development in subsequent years to give back to the community and stay abreast of current research and our ever-changing environment. Volunteer hours and learning requirements ensure that our Master Gardeners’ skills and knowledge are always up to date.
Our Volunteer Hour Requirements
WSU Extension Master Gardener Interns – 40 service hours must include:
- 15 Answer/Plant Clinics hours, minimum, and
- 10 Demonstration Gardens hours, minimum, and
- additional service* hours, as needed, to complete a total of at least 40 service hours
Certified WSU Extension Master Gardeners:
- 25 service* hours, and
- 10 Continuing Education hours
Emeritus WSU Extension Master Gardeners:
- 5 service* hours, and
- 5 Continuing Education hours
*Note: Service hours may include any combination of Answer/Plant Clinics, Demonstration Gardens, Other Educational Delivery, Program Support, and Youth Outreach hours.
For questions about volunteer requirements and policies, please contact the Program Office at king.mg@wsu.edu.
Extension Master Gardener Educational Outreach
Pest Alert
Japanese beetle
European chafer beetle
