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

April 9, 2020

Trees and the Law

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

April 14, 2020

Soil Remediation and Building Healthy Soils

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

April 15-17, 2020

ACTE - Tree Insect and Disease Management

Red Deer, Alberta Canada

April 16, 2020

What Do Trees Know? – How Trees Sense, Respond, and Communicate with the World Around Them

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

April 17-19, 2020

ArborFEst EXPO 2020

Fletcher/Asheville, NC United States WNC Agricultural Center