University of Washington Botanic Gardens
The Arboretum is a hidden gem on the shores of Lake Washington. Its 230 acres hold a dynamic assortment of plants with plenty of walking trails and programs.
Washington Park Arboretum
2300 Arboretum Drive E
Seattle WA 98112
Seattle’s nexus for the scientific and horticultural communities to gather, learn and be inspired. Home to the Union Bay Natural Area, an ecological restoration laboratory.
Center for Urban Horticulture
3501 NE 41st Street
Seattle WA 98105
Plants occasionally available for sale.
Visit their website: botanicgardens.uw.edu.