1976 - Mildred E. Mathias, John E. Voight, Pennsylvania Horticultural Society
1977 - Hugh Steavenson
1978 - Robert James Hilton, Leslie Laking, Joseph W. Oppe, Henry Teuscher
1979 - George Kelly, Ruth Ashton Nelson, Catherine Sweeney
1980 - Rosalynn Carter, Eugene E. Cline, Richard A. Howard, The Morton Arboretum
1982 - Carlton B. Lees, Russell J. Seibert
1983 - Ernest B. Chew
1984 - Geoffrey L. Rausch
1985 - F. Raymond Brush
1987 - Roy L. Taylor
1988 - Myron Kimnach
1990 - Carl A. Totemeier
1991 - Ann Lyon Crammond
1992 - Brian O. Mulligan, Elizabeth Scholtz
1993 - Robert Ornduff, Freek Vrugtman
1994 - Gurdon L. Tarbox, Jr.
1995 - J. C. Raulston
1996 - Peter H. Raven
1997 - Elizabeth McClintock
1998 - Charles A. Lewis, C. W. Eliot Paine
2000 - John Creech, George Ware
2001 - Charles Lamoureux
2002 - Harrison Flint
2003 - Edward R. Hasselkus
2005 - Gregory Long
2006 - Steven Timbrook
2007 - Barbara Whitney Carr
2008 - Peter J. Olin
2009 - James P. Folsom
2010 - Janet Marinelli
2010 - Patricia Collins
2011 - Brian Holley, Melissa Marshall, Shane Smith
2012 - Carol Line, Eric Tschanz
2013 - Ed Schneider, Paul Meyer
2014 - Bob Lyons, Panayoti Kelaidis
2015 - Don Rakow
2016 - Paul Redman, Chipper Wichman
2017 - Kris Bachtell, Dr. Christopher Dunn
2018 - Clara Curtis, North Carolina Arboretum; Harold Sweetman, Jenkins Arboretum
2019 - Mark Runciman, Royal Botanical Gardens; Mary Pat Matheson, Atlanta Botanical Garden
2020 - Sadafumi Uchiyama, Portland Japanese Garden; Susan Hamilton, UT Gardens
