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

March 7-9, 2019

2019 Mexican Tree Climbing Championship

Oaxaca, Oaxaca Mexico Museo Infantil de Oaxaca

March 7-9, 2019

Basic Tree Climbing Course

Cambrils, Tarragona Spain Parc Samà

March 7, 2019

Basic Tree Appraisal

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

March 8, 2019

Outdoor Tree School

Orlando, FL United States UF-IFAS Orange County Extension

March 8, 2019

Advanced Tree Appraisal: Anchoring Appraisals with Multiple Methods

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