Garden in suburban Seattle designed by the Olmsted brothers, offering woodland plantings and panoramic views. History, and illustrated pages for many featured plants and trees. Open for guided tours only.

Multiply themed garden in Bellingham, including a begonia and fuchsia garden and a gigantic stump garden. Visitor information and photo gallery.

Formerly private gardens and collections in Shoreline now open to the public. History, information about visiting and the botanical collections, and volunteer opportunities.

Estate whose garden areas include rose and knot gardens, alpine scree and rock garden, waterfall, and fern and woodland gardens.

Garden near Seattle, home to one of the largest rhododendron collections in the world. Information about species, photos gallery, and list of plants and seeds for sale.

Urban green space on the shores of Lake Washington in Seattle includes collections of Acers and New Zealand natives, and a functional winter garden landscape. Information about visiting and collections, news and events, and seasonal highlights.

Seven acres of gardens at the foot of the Olympic mountains known for rare hybrid and species rhododendrons, azaleas, magnolias, trees and shrubs.