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 2020. 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

March 31, 2020

Pruning Shrubs for Maximum Health and Beauty: A Hands-on Class

Philadelphia, PA United States The Morris Arboretum of the University of Pennsylvania

April 2-3, 2020

Tree School: An Entry-Level Arboricultural Short Course

Wimauma, Florida United States UF-IFAS Gulf Coast Research and Education Center

April 2, 2020

Basic Chainsaw Safety

New Brunswick, New Jersey United States Holly House

April 6, 2020

How to Manage and Prune Trees for Wildlife

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

April 8, 2020

How to Manage and Prune Trees for Wildlife

Seattle, Washington United States Washington Park Arboretum - Graham Visitor's Center