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Basic Tree Identification

September 2 @ 9:00 am - 3:00 pm
Instructor: Bess Bronstein CEUs: 5.5 ALMTU / 5.5 B-S Registration Fees: $100.00 - $200.00

This workshop was originally scheduled for May 12 and has been postponed to September 2.

Proper tree management starts with knowing the tree you’re managing. When trying to recommend an appropriate treatment, diagnosing an issue, or understanding how a tree will respond to a change in conditions, identifying the tree you’re dealing with is the first step.

This basic identification workshop serves as an introduction to common terms, concepts, and techniques in tree identification. The objective of the course is to get you familiar with how to identify a tree, covering leaves, fruit, bark, twigs, and form.

As there are well more species that can grow in our region than can be covered in a single basic workshop, focus will be on larger concepts that will lay the ground work for future identification. We will cover the use of dichotomous keys and get familiar with descriptive terminology to help narrow down unknown species.

The workshop will be inside for the first half and will go outside for the second half to get familiar with using the concepts and terminology in the real world. We’ll be in the University of Washington Arboretum, so we will have no shortage of species to find! The workshop will be hands on, and questions and interaction is encouraged. Please bring proper attire for standing and taking notes in inclement weather.


Location: Washington Park Arboretum, Graham Visitor's Center, 2300 Arboretum Drive E
Seattle, WA 98112

  • 8:30am: Arrival, coffee, and networking
  • 9:00am – 11:30am: Review Basics of Tree ID (terminology, concepts, techniques) and focus on some specific trees
  • 11:30am—12:00pm: Lunch
  • 12:00pm – 3:00pm: Walk through the trees, hands-on ID focused on concepts and common species

What to Bring:

  • Notebook for sketches and notes
  • Favorite ID books
  • Clothing for all weather situations


Bess Bronstein is a horticultural consultant, educator, ISA Certified Arborist® and Qualified Tree Risk Assessor based on the Kitsap Peninsula in Kingston, Washington. She has over 30 years experience in arboriculture, landscape management and garden design. Bess holds an A.T.A. degree in Ornamental Horticulture, and a Master of Education (M.Ed.) degree from the University of Washington. She was an instructor for the Edmonds Community College horticulture program for 28 years, with a focus on courses in pruning and tree care, plant identification, plant pests/diseases and diagnosis, and soils. Bess frequently teaches public and professional arboriculture and horticulture courses throughout the Pacific Northwest.

Refund Policy

  • Cancellations made at least 10 days prior to the event will be refunded minus the PayPal processing fee (2.9% + .30 cents)
  • Cancellations made within 5-9 days of the event will be refunded at 75%.
  • Refunds will not be made available for no-shows.

Late Registration

  • Participants are expected to enroll prior to the registration deadline.
  • Participants can register at the door of the event only if space is available. Individuals will need to pack their own lunch.
  • Late registration is possible on a space available basis. You can contact our office at (800) 335-4391. There may, or may not be, room available for those who show up without registering ahead of time for the workshop. We encourage you to register for the workshop in advance.

Allied Professionals are members of allied organizations. See our list of qualifying organizations.


Washington Park Arboretum – Graham Visitor’s Center
2300 Arboretum Drive E
Seattle, WA 98112 United States
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