Frederick Andrews Walpole Garden

Get Involved & Lend Your Hands

This garden grows because of people who care. Learn how to volunteer — and meet the remarkable soul behind it all.

The Heart of the Garden

Meet Bob Bonner

Bob Bonner at the Walpole Garden
Robert Bonner
Robert Bonner
Garden Champion & Volunteer Lead

If the Walpole Garden has a soul, it is Bob Bonner. A board member of Friends of Terwilliger and the driving force behind this garden from its earliest days, Bob has transformed what was once a blackberry, invasive locust tree, and ivy-infested acre of utility right-of-way into one of Southwest Portland’s most beloved outdoor destinations.

“Bob created and championed the Walpole Garden… He is celebrated for his tenacity and collaborative spirit, partnering with NW Natural Gas, the City, and student volunteer crews who have all worked together to manifest a green respite which is beautiful and hiker-friendly.”

Over the course of six-plus years, Bob has organized and guided the garden’s transformation: clearing invasives, designing walking trails, overseeing construction of the labyrinth with its spectacular valley views, establishing native plant collections, and recruiting countless volunteers — from Lewis & Clark College students to Scout troops to neighborhood neighbors — to bring the vision to life.

Bob is the person who uncovers a buried 1908 sidewalk and sees an opportunity. Who installs locust log seating and calls it furniture. Who organizes sunset labyrinth walks by candlelight with Native American flute music. The garden reflects his belief that public land should be beautiful, purposeful, and welcoming to everyone.

The Friends of Terwilliger put it simply: “He’s an inspiration to all of us. If you want to volunteer, the best place to start is right here with Bob.”

Volunteer Opportunities

Ways to Help the Garden Grow

No experience necessary — just enthusiasm for native plants, open skies, and a good pair of gloves. There’s meaningful work here for everyone. Please send an email with your contact information and interest to Walpole Garden — pdx@gmail.com.

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Native Plant Care
Help plant, weed, water, and tend the native species that make this garden a living illustration of Walpole’s 19th-century botanical work. Seasonal plantings happen throughout the year.
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Invasive Removal
Join monthly work parties to clear English Ivy, Himalayan blackberry, and other invasives from the parkway. This hands-on, high-impact work is the backbone of everything the garden has become.
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Trail & Path Work
Help maintain and extend the garden’s network of gravel paths, log steps, and other areas — keeping the labyrinth, viewpoints, and woodland paths accessible and welcoming for all visitors.
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Plant Identification & Education
Help create interpretive signage, guide garden walks, or document plantings. If you have knowledge of Oregon native plants or botanical history, this garden could use your expertise.
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Photography & Documentation
Capture seasonal change, plant growth, and community events. Documenting the garden’s evolution is vital to storytelling, grant applications, and celebrating the volunteers who make it happen.
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Fundraising & Outreach
Help Friends of Terwilliger raise the funds that make new projects possible — from new plant acquisitions to interpretive features. Every dollar raised by the community goes right back into the parkway.
Also from Friends of Terwilliger

More Ways to Support the Parkway

The Walpole Garden is just one part of the larger, century-old Terwilliger Parkway. Friends of Terwilliger stewards the whole corridor — and there’s always more to do.

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