Showing the world the benefits of trees

We promote the professional practice of arboriculture to foster a greater awareness of the benefits of trees.

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Keep up with ISA

2020 Awards of Distinction and True Professionals

Nominate the best professionals in the arboriculture industry by 8 March 2019. Submit your nomination.

ISA Expands Certification Eligibility Requirements

ISA has announced expanded eligibility criteria for the ISA Certified Arborist® certification recognizing assessment-based programs to fulfill the education requirements to take the exam.

Upcoming Events

February 3, 2020

Fruit Tree Pruning

Oregon City, Oregon United States Clackamas Community College, Environmental Learning Center

February 10, 2020

Fruit Tree Pruning

Seattle, WA United States Good Shepherd Center, Room 202

February 12-14, 2020

ISA Ontario Annual Conference & Trade Show

London, Ontario Canada RBC Place

February 13-14, 2020

Tree Appraisal Techniques

Oregon City, Oregon United States Clackamas Community College, Environmental Learning Center

February 13, 2020

Southeast Trees & the Law Symposium

Raleigh, NC United States McKimmon Center at NC State University