Keyword: Plant and garden societies--Pacific Northwest
American Society of Landscape Architects – Washington Chapter
American Rose Society Pacific Northwest District
American Bamboo Society – Pacific Northwest Chapter
Seattle Rhododendron Society
Seattle Audubon Society
“Seattle Audubon cultivates and leads a community that values and protects birds and the natural environment.”
Puget Sound Dahlia Association
Puget Sound Bonsai Association
Pacific Northwest Palm & Exotic Plant Society
“The Pacific Northwest Palm & Exotic Plant Society (PNWPEPS) is a non-profit chapter of the International Palm Society. They are dedicated to the successful cultivation of palms and other exotic plants outdoors in British Columbia, Washington and Oregon.”