Frequently Asked Questions

ISA strives to foster a greater public awareness of the benefits of trees by assisting homeowners in obtaining the knowledge needed to help sustain trees in an urban environment. Below you will find a list of some common questions. Here, and throughout this site, homeowners will find answers and valuable resources to assist with tree care needs.

		About ISA What is the International Society of Arboriculture (ISA)? What is the difference between an arborist and a certified arborist? Why should I hire an arborist? How do I find a certified arborist near by me? How do I contact the International Society of Arboriculture?
		About Trees Why are trees beneficial? How do I find information about tree care? What type of tree should I buy? How should I plant my tree? How often does my tree need care? What is pruning a tree? What is topping a tree? What is mulching? What should I do if I think my tree has insect and/or disease problems? Can trees be hazardous?

Developed by the International Society of Arboriculture (ISA), a non-profit organization supporting tree care research around the world and is dedicated to the care and preservation of shade and ornamental trees. For further information, contact:
ISA, P.O. Box 3129, Champaign, IL 61826-3129, USA.
E-mail inquires: isa@isa-arbor.com

© 2007 International Society of Arboriculture.