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

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
	Warning: Check Tree-care Credentials Several autumn fatalities linked to dangerous tree care practices are prompting a coalition of arborists and urban foresters to urge contractors (and others) to hire only certified tree-care professionals. MORE >> Best Trees For The Street Scientist John Hammond of the Agricultural Research Service (ARS), the U.S. Department of Agriculture’s chief scientific research agency, has announced the findings of a four-year project to determine the best trees to use in urban spaces. MORE >> Selling Houses By the Yard Worried home owners hope landscaping adds value- from the Wall Street Journal MORE >> NADF Hardiness Zone Map Find out the right tree to plant where you live MORE >>

"The mighty oak was once a little nut that firmly stood it's ground."

	Resources
	Arboriculture: History and Development in North America This hard cover book discusses how arboriculture has become an important force in modern ecology. This video (VHS) features hundreds of historic photos and clips that reflect the history of arboriculture. Book, $59.95; Video, $24.95. Both for $74.95 Available through the ISA Web Store