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Earthshare of Washington
Chapters are the very heart beat of the Washington Native Plant Society and it is through the chapters that most members learn about native plants. Chapters hold regular meetings with programs, organize over 100 field trips each year and are involved in various volunteer projects related to native plant restoration, conservation, and education.
There are 11 active chapters: Central Puget Sound in Seattle; South Sound in Olympia; Koma Kulshan in Bellingham; Olympic Peninsula in Port Townsend and Port Angeles; Salal in Mt.Vernon; San Juan Islands on Orcas Island; Northeast in Spokane; Okanogan in Okanogan; Central Washington in Yakima and Ellensburg; Columbia Basin in Tri Cities and Walla Walla; and Wenatchee Valley in Wenatchee. The Palouse Chapter in Pullman and the Suksdorfia Chapter in Vancouver have been inactive for many years.
Members of the Society are encouraged to form local chapters. Ten or more persons, may organize a chapter of the Washington Native Plant Society with permission from the State Board of Directors.
| Date of Formation | Chapter |
| 1977 | Central Puget Sound Chapter |
| 1977 | Central Washington Chapter |
| 1977 | South Sound Chapter |
| 1977 | Palouse Chapter (currently inactive) |
| 1978 | Koma Kulshan Chapter |
| 1982 | Northeast Washington Chapter |
| 1983 | Olympic Peninsula Chapter |
| 1984 | Suksdorfia Chapter (currently inactive) |
| 1984 | Okanogan Chapter |
| 1991 | Salal Chapter |
| 1995 | Wenatchee Valley Chapter |
| 1997 | Columbia Basin Chapter |
| 1997 | San Juan Islands Chapter |