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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ISA Annual Physical Inventory

Due to ISA’s annual physical inventory, orders placed after 9:00 a.m. EDT (UTC-4) on Friday, 25 June 2021, through Friday, 2 July 2021, will not ship until the week of 12 July 2021, at which time ISA will resume regular turnaround times. We apologize for the inconvenience and ask that you plan your ordering accordingly. If you have any questions, please contact the customer service team at +1.678.367.0981 or Thank you for your patience.

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Keep up with ISA

2020 Awards of Distinction and True Professionals

The nomination period is closedThe 2020 award winners will be annouced at the ISA Annual International Conference and Trade Show.


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June 24, 2021

Tree Planting: 20 minutes in the life or death of a tree

Amherst Junction, Wisconsin United States Central Wisconsin Environmental Station

June 25-26, 2021

Women's Chainsaw Safety and Cutting Techniques

Olympia, WA United States

July 7, 2021

WCISA - CSI for Invasive Insects: Honing Your Diagnostic Skills- Presented on Zoom

Porterville, CA United States Presented on Zoom

July 13, 2021

ISA 2021 Virtual Tree Climber Summit

, United States Virtual