The International Society of Arboriculture (ISA) was founded in 1924 and has served the tree care industry for over ninety years as a scientific and educational non-profit organization. The 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.
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