Tree Doctors, Inc. and Tree Doctors North, Inc. are two highly skilled tree care companies who serve different areas of the Phoenix metropolitan area. Their highly skilled teams of I.S.A. Certified Arborists and Tree Workers are headed by Ralph Spilsbury, Ph.D. with 30 years experience in plant science. Our work is guided by the standards of the International Society of Arboriculture and based on over 75 years of ongoing research and education. Property Owners and Managers love our tree management plans, and all our clients love what we do for their trees and their property value. Contact us today for a FREE educational presentation and the best value in Tree Care!