Hoyt Arboretum Friends (HAF) is a membership-based, nonprofit organization working in partnership with Portland Parks and Recreation to support Hoyt Arboretum.

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2013 Arborists in the Arboretum Day Volunteers

On Saturday, September 7, Hoyt Arboretum Friends hosted the 28th annual Arborists in the Arboretum Day, when professional arborists from the Portland metro area and beyond volunteer their time and expertise to care for Hoyt Arboretum's trees.

This year, nearly 60 arborists representing more than 25 companies volunteered for Arborists in the Arboretum Day. We want to express our sincere thanks to the generous arborists who support Hoyt Arboretum!


Arborscape Ltd. Inc.

Ascending the Giants


Autumn Arbor Care

Bob Stewart Services

Buds Expert Tree Care

City of Portland Urban Forestry

Collier Arbor Care, A Division of Bartlett Tree Services

Emerald Tree

General Tree Service

Heartwood Tree Care

Hedgehog Tree Care

Integrity Tree Care

Kanshoh Tree Preservation

Katy Bigelow LLC

Madrone Modern

Oregon Tree Care

Overlook Tree Preservation

Peacock Tree Preservation

Roots and Shoots Trees

Teragan & Associates

Tree People


Treestyle Arbor Care LLC

TruGreen LandCare

Urban Forest Professionals

Ward Tree Care

How to become an Arborist Partner

If you are interested in becoming an Arborist Partner with Hoyt Arboretum please click here to visit our Arborist Partner Program Page.

Thank you for your interest!

What is Arborists in the Arboretum Day?

Once a year our arborists friends from the Portland metro area gather up their tools and swing up to Hoyt for our annual Arborists in the Arboretum Day. Each arborist spends their precious Saturday lending their experience and expertise in the careful care of our collections. We are thrilled to host this boisterous group of colleagues and are amazed at the skill and accuracy with which they do their work.

While this event is closed to only our arborist volunteers, feel free to stop by and watch them work - from a safe distance - in the collections. They will be visiting us again on Saturday, September 6, 2014 from 8am until 12pm.