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 Arborist Partners!

Larch Partners

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Kevin Carr

(503) 381-1781

Serving: Tree service and shrub care in the Portland, Oregon area 


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Clint Landon

(503) 656-2656

Serving: Portland & SW Washington

Specialization: Tree and Shrub Care Services, Plant Health Care Programs, Fertilization Programs, Pruning and Removal, Stump Grinding, Cabling and Bracing, Lawn Care Services, Landscaping, Holiday & Event Decorations & Lighting


Oregon Tree Care

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(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



Teragan & Associates, Inc. Arboricultural ConsultantsTeragan_logo_cmyk correct.png

Terry Flanagan

(503) 697-1975

Serving: the greater Portland metropolitan area 

Specialization: Consulting, Diagnostics, Expert Witness and Testimony, Training and Education, Tree Protection, Tree Risk Assessment, Tree Appraisal Evaluation


Treecology, Inc.

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


Urban Forest Pro

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(503) 226-7143

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

Serving: Portland/Vancouver area


Magnolia Partners



Ginkgo Partners

Emerald Tree LLC The Art and Science of Tree Care 

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(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.


Tree Solutions, Inc.

Casey ClappTree Solution.png

(503) 816-9345


Tree Solutions, Inc. specializes in urban forest management for residences, campuses, and municipalities as well as tree preservation and restoration during construction projects.

Serving: A tree consulting company in the Pacific Northwest, with offices in Seattle, Portland and Bend




 While Hoyt Arboretum Friends appreciates the 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 9, 2017 from 8am until 12pm.