Protecting & Enhancing a Northwest Treasure

Members, donors, visitors, and volunteers have helped make the Washington Park Arboretum a Northwest treasure since its founding in 1934. The Arboretum Foundation invites you to explore the Arboretum’s 230 acres and join in our mission to protect and enhance this spectacular urban green space and world-class plant collection.

Learn about our mission and vision

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40,000

The number of plants being cared for by Arboretum arborists and gardeners.

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7,000

Number of children who participate in  the environmental education program each year.

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$620K

The amount we gave our partners in 2020 to support the Arboretum.

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13,892

The number of hours our volunteers contributed in 2019.

News Articles

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Earth Day Volunteers Pull 50+ Cubic Yards of Weeds!

Earth Day Volunteers Pull 50+ Cubic Yards of Weeds!

A total of 116 volunteers participated in our annual Earth Day at the Arboretum work-service event on April 23. They removed more than 50 cubic yards of ivy, blackberry, and other invasive weeds from plant collection beds and natural areas—covering a combined area of...

Arboretum-Based Research Tackles the Azalea Lace Bug

Arboretum-Based Research Tackles the Azalea Lace Bug

Since 2015, the invasive azalea lace bug (Stephanitis pyrioides) has been causing serious damage to azaleas and rhododendrons in our state, including in the Arboretum. A tiny aphid relative, the lace bug removes chlorophyll from Rhododendron foliage, weakening the...

Wild and Wonderful Willows of the Arboretum

Wild and Wonderful Willows of the Arboretum

Beautiful willows, such as the Salix gracilistyla 'Melanostachys' pictured here, are blooming in the Arboretum's Witt Winter Garden and beyond. In the latest issue of the Arboretum Bulletin, writer and estate gardener Daniel Mount discusses the wild and weedy willows...

Arboretum Selected for 2022 Partnerships Lab!

Arboretum Selected for 2022 Partnerships Lab!

The Arboretum Foundation and its City and UW partners are thrilled to announce that we have been selected by the Central Park Conservancy's Institute for Urban Parks to participate in its 2022 Partnerships Lab. This initiative supports urban park organizations as they...

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Support This Special Place of Solace! 

Read about our 2020–21 fiscal year accomplishments.

UW Botanic Gardens
Seattle Parks and Recreation.

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