Frequently Asked Questions
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How to contact the International Society of Arboriculture?

A: Please contact ISA to obtain additional information on arboriculture (tree care) related topics. We will be happy to assist you!

International Society of Arboriculture
P.O. Box 3129
Champaign, IL 61826-3129, USA
Phone: (217) 355-9411
Toll Free: (888) 472-8733
Fax: (217) 355-9516


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 never saw a discontented tree. They grip the ground as though they liked it, and though fast rooted they travel about as far as we do. They go wandering forth in all directions with every wind, going and coming like ourselves, traveling with us around the sun two million miles a day, and through space heaven knows how fast and far!" - John Muir


ISA Members

ISA Members should carry a current identication card. Please look for this logo to verify if the individual or company is a member in good standing. Membership can also be verified by contacting ISA at 1-888-ISA-TREE.

Professional Affiliation
....Ask about membership in professional organizations such as the International Society of Arboriculture (ISA). Affiliation with industry organizations demonstrates a willingness to stay up-to-date on the latest techniques and information. MORE >>

© International Society of Arboriculture 2009
P.O. Box 3129, Champaign, IL 61826
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