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

icon of trees


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

icon of a child


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

hands and heart icon


The amount we gave our partners in 2021-22 to support the Arboretum.

volunteer hours icon


The number of hours our volunteers contributed in 2021.

News Articles

See all news articles

Restoring the Hydrology of Arboretum Creek

Restoring the Hydrology of Arboretum Creek

Local non-profit the Friends of Arboretum Creek is working with King County and the Arboretum partners to improve the ecology of the creek and watershed in and around the park. A key initiative is the Headwaters Project, which will help restore year-round waterflow to...

Opening Night Returns to Kick Off the Garden Festival in Style

Opening Night Returns to Kick Off the Garden Festival in Style

Guests enjoying the preview of the show gardens at Opening Night. More than 400 guests attended our Valentine’s-themed Opening Night Party on February 14 and showed their love for the Arboretum. Our first in-person gala in three years, LOVE IN BLOOM raised over...

Robin in Tree


Support This Special Place of Solace! 

Read about our 2021–22 fiscal year accomplishments.

UW Botanic Gardens
Seattle Parks and Recreation.

There are many ways to support our work. Choose one that’s right for you.