William Francis Ganong — Director, 1894–1932

Dorothy May Anderson — Landscape Architect, 1935–1943

William I.P. Campbell — College Horticulturist, 1937–1971

Gregory D. Armstrong — Director, 1971–1983

John I. Bak & Ellen M. Shukis — Interim co-Directors,
August 1983–May 1984

Richard H. Munson — Director, May 29, 1984–summer 1995

Susan P. McGlew — Interim Director, summer 1995–August 1996

Kim Tripp — Director, August 7, 1996–January 25, 1999

Robert G. Nicholson — Interim Director, January 1999–July 2000

Michael Marcotrigiano — Director, August 2000–June 2016

Donald Baumer — Interim Director, July 1, 2016–June 30, 2017

Tim Johnson — Director, June 26, 2017 to present