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

ISA Accepting Nominations for 2019 Awards of Distinction and True Professionals

Nominate the best professionals in the arboriculture industry by 4 March 2019. Submit your nomination!

2019 ISA Conference Call for Presentations

The International Society of Arboriculture is now accepting presentation submissions for the 2019 ISA Annual International Conference & Trade Show. Submit your presentation before the 1 March 2019 deadline.

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

July 22-23, 2019

ArborMaster L1 Precision Tree Felling, Chainsaw Safety and Handling

Ashford, CT United States

July 23, 2019

The Woody Plants of Summer: Native Plants

New Brunswick, NJ United States Holly House

July 25-27, 2019

Baltic States Tree Climbing Championship 2019

Palanga, Lithuania Palanga Botanical Park

July 25-27, 2019

Baltic States Tree Climbing Championship 2019

Palanga, Lithuania Palanga Botanical Park