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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Hoyt Arboretum Friends Arborist Partners

The arborist companies listed below are partners with Hoyt Arboretum Friends (HAF).  In order to become a partner, they have donated their time, expertise and made a financial commitment to Hoyt Arboretum.  In partnering with HAF, they help provide an environment of learning, research and conservation to the 350,000 visitors of Hoyt Arboretum annually.  

Join HAF in supporting our business partners!

Larch Partners

Oregon Tree Care

Damien Carre’Oregon_Tree_Carel_Logo-reduced.jpg

(503) 929-9437

Serving: the greater Portland metropolitan area

Specialization: Certified Arborists, tree pruning, tree removal, soil testing, tree planting, ornamental/shrub pruning, cabling/bracing, stump grinding, 24-hour emergancy services

Treecology, Inc. 
It’s all about trees

Damon Schrosk
(503) 804-7868

Serving: Portland Metropolitan, Clackamas County 

Specialization: Pruning, removal, preservation, hazardous tree assessment and removal, pre-construction consulting, tree inventories and management plans


Magnolia Partners

Ginkgo Partners

Emerald Tree LLC The Art and Science of Tree Care 

Jim Wentworth-PlatoET_small_logo_09reduced.jpg
(503) 310-5045

Serving: Emerald Tree LLC serves the greater Portland metropolitan area.

Specialization: Board certified master arborist; specialties include the pruning of shrubs and trees and tree education.


Teragan & Associates Inc. teragan-logo.jpg

Terrence P. Flanagan

(503) 803-0017

Serving: Teragan & Associates Inc. serves the greater Portland metropolitan area.

Specialization: Board certified master aborist; services include Tree Risk Evaluation, Tree Protection Plans for Development, Tree and Plant Appraisal and Expert Witness services.


Urban Forest Pro

Jeff Moore

(503) 226-7143

A full-service company offering services to meet all the arborcultural needs
of customers.

Serving: Portland/Vancouver area

Ward Tree Care

Chris Ward

(503) 730-3906


A full service tree care company offering tree pruning, removal and other tree care services.

Serving: Ward Tree Care serves the greater Portland metropolitan area, including West Linn, Lake Oswego, Tualatin, Wilsonville, Tigard, Sherwood, Durham, Beaverton and SW Portland.


 While Hoyt Arboretum Friends appreciates support from our Arborist Partners we do not recommend or endorse the work of individual arborists.

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.

Hoyt Arboretum is happy to welcome 90 arborists representing more than 30 different companies. 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 on Saturday, September 12, 2015 from 8am until 1pm.