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 Seeks Qualified Nominees for ISA Board of Directors

Deadline to submit nominations is 30 September, 2018.

Attend the 2018 NATCC

Enjoy the North American Tree Climbing Championship in Providence, RI in September 29-30, 2018.

See You In Knoxville!

We're looking ahead to the 2019 ISA International Conference & Trade Show and ITCC in Knoxville, TN!

Upcoming Events

September 21, 2018

Pesticide Application for Ornamental Plants

Philadelphia, PA United States Morris Arboretum

September 21-23, 2018

Women's Tree Climbing Workshop

Petersham, MA United States Harvard Forest

September 21-23, 2018

Women's Tree Climbing Workshop

Petersham, MA United States Harvard Forest

September 22, 2018

Illinois Arborist Association Tree Climbing Championship

Morton Grove, IL United States Forest Preserve of Cook County

September 26, 2018

Palm Fundamentals

Coral Gables, FL United States Fairchild Tropical Botanic Gardens