International Society of Arboriculture

Recognized as a global source for arboricultural information and knowledge, the International Society of Arboriculture (ISA) is a cohesive, inclusive network of practitioners, scientists, and students committed to promoting the professional practice of arboriculture and fostering a greater worldwide awareness of the benefits of trees. Through research, technology and education ISA supports the development of qualified, competent, and safe tree care professionals who contribute to a world with healthier trees, sustainable communities, and a green economy.