Skip to main content Skip to navigation
Washington State University

Master Gardeners of King County

Program Contact: Sarah Moore, King County Master Gardener Program Coordinator
(425)-738-0109 •

The WSU Extension King County Master Gardener program provides a multitude of resources for home gardeners. This gardening information is available to the public and is

  • research-based and
  • focused on environmentally friendly and sustainable gardening practices

Explore this page and our website for more resources and FREE information available to the home gardener from the Master Gardeners of King County.


Become A Master Gardener

Asian woman clipping a pink rose
How to Become A Master Gardener
The application window for the 2024 class is open until October 31, 2023. Visit the Become a Master Gardener page for information about joining the WSU Extension Master Gardener Program in King County.

Gardening Questions?

Ask A Master Gardener graphic
Email Us
Send your gardening questions along with photos to and an Extension Master Gardener will respond to your questions. See our page for more information about how to share your plant questions and photos.

Soil Testing

The King Conservation District provides a soil testing service to residents of King County. For complete information about submitting a sample, go to the KCD website at or phone 425-282-1900.


Educational Resources

Variety of vegetables
Growing Groceries Gardening Classes
The Growing Groceries class topics range from favorites like tomatoes and small fruit to seed starting, weeds, water and pest management. Classes will be held on select Wednesday evenings 7:00 – 9:00 p.m., January through June via Zoom. Registration is open for these classes.

Annual border at the Bellevue Demo Garden
Bellevue Demo Garden Saturday Workshops
Topic include new plants and methods as well as current science-based research and techniques for the Pacific Northwest gardener. Saturdays at 9:30 to 10:30 a.m. starting in January via Zoom. Registration is open for these workshops.

Gardener with a box of assorted colorful vegetables
King County Master Gardeners Speakers Bureau
Would you like to schedule a Washington State University Extension Master Gardener to speak to your gardening club or other group? WSU Master Gardeners do presentations on a variety of gardening topics as part of their mission to empower and sustain diverse communities with relevant, unbiased, research-based horticulture and environmental stewardship education.

Children & Youth Gardening

More Complex Gardening and Nature Activities for Children and Youth
Find downloadable lessons on spiders, leaves, rain, pinecones, bees, seeds, flowers and other subjects about gardening and nature!

bird nest with three blue eggs
Simple Gardening and Nature Activities for Children and Youth
Bug Races, Scavenger Hunts, Tape Bracelets and more. Activity sheets to download.

Gardening Tip Sheets

Tulips in many colors
Gardening Tip Sheets
Our gardening tip sheets provide information on a wide range of topics specific to gardening in King County and are available for download, free. Check out all of our tip sheets

Master Gardener teaching girl to garden
Climate Friendly Gardening – Tip Sheet #14
Gardeners can help reverse the accumulation of heat-trapping gases by growing plants and building healthy soils. Find out how.

Demonstration Gardens

Soos Creek Botanical Garden and Heritage Center
Demonstration Gardens
In each of these demonstration gardens, the community can see firsthand the types of plants that grow well in our area and learn recommended planting practices and overall garden care.




Feature image by Jeswin Thomas. Small image of hellebore by Alicja.


Back to top


Spring tulips

Gardening Classes

Many of our education classes are now available online. Check for information at Bellevue Demo Garden workshops, the Growing Groceries classes and other KCMG Education activities on the Foundation website.

Clinics and Gardens

Here is the schedule for our Ask a Master Gardener Clinics with hours when you may connect with our Master Gardeners.

Find the locations for all the King County Clinics and Gardens where you may connect with our Master Gardeners.

Master Gardeners are available to respond to your questions year-round through our Ask a Master Gardener Email Clinic.

Master Gardener Foundation of King County

The Foundation is a 501(c)(3) nonprofit founded in 1984 to raise funds support the activities of the WSU Extension Master Gardener program in King County. Donated funds are used to help the program volunteers meet the program’s mission to provide research-based education about urban horticulture and sustainable gardening to the residents of King County.

Visit the Foundation website,, to learn more about their fundraising activities and educational opportunities for the public to extend their gardening knowledge and how to donate to support our Master Gardeners.