Dr. Bert Cregg is an Extension Specialist and Professor of Horticulture and Forestry at Michigan State University. He conducts research and extension programming on physiology and management of trees in landscapes, nurseries and Christmas tree production. A major focus of his program is the interface between nurseries and the landscape to improve tree establishment and long-term survival.

Prior to joining the faculty at Michigan State University, he was a research tree physiologist for International Paper and the USDA Forest Service.