Frequently Asked Questions
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What is the International Society of Arboriculture (ISA)?

A: The International Society of Arboriculture (ISA) was founded in 1924 and has served the tree care industry for over seventy years as a scientific and educational non-profit organization. ISA supports tree care around the world and is dedicated to the care and preservation of shade and ornamental trees. This organization continues to be a dynamic medium through which arborists around the world share their experiences and knowledge for the benefit of society. Aligned on many fronts with other green organizations, ISA is working hard to foster a better understanding of trees and tree care through research and the education of professionals as well as global efforts to inform tree care consumers.

News

National Register of Big Trees
Big trees are symbols of all the good work trees do for the quality of the environment-and our quality of life. MORE >>

NADF Hardiness Zone Map
Find out the right tree to plant where you live MORE >>

Don't Move Firewood!

Camping Season is fast approaching. Please remember to not transport firewood. Tree-killing insects and diseases can lurk in firewood. These insects and diseases can't move far on their own, but when people move firewood they can jump hundreds of miles. New infestations destroy our forests, property values, and cost huge sums of money to control. MORE >>

National Tree Benefits Calculator
Make a simple estimation of the benefits individual street-side trees provide. With inputs of location, species and tree size, users will get an understanding of the environmental and economic value trees provide on an annual basis. For more detailed information on urban and community forest assessments, visit the i-Tree website. MORE >>

What is an Arborist and How Can You Find One?
From Planet Green a Discovery Company MORE >>


"I think that I shall never see / A poem lovely as a tree." - Joyce Kilmer, "Trees," 1914

Resources

Legends of Arboriculture

This video features hundreds of historic photos and clips that reflect the history of arboriculture.

Video (VHS or DVD), $24.95.

Available through the ISA Web Store

© International Society of Arboriculture 2009
P.O. Box 3129, Champaign, IL 61826
Email comments & questions to isa@isa-arbor.com