1989 - Victor Gass
1990 - Bernard Jackson
1991 - Lucy Tolmach
1992 - Pierre Bourque
1994 - David Murbach
1995 - Robert Brackman
1996 - Robert Hays
1997 - Rick Darke
1998 - Richard V. Piacentini
1999 - James Folsom
2000 - Jennifer Ceska
2001 - Paul Meyer
2002 - David A. Galbraith
2003 - Christopher Woods
2004 - Scot Medbury
2005 - Cynthia Klemmer
2006 - Sarah Reichard
2007 - Kathleen Socolofsky
2008 - Christine Flanagan
2009 - Maureen Heffernan
2010 - Garry Clarke
2011 - Casey Sclar
2012 - Andrew Bunting, Andrea Kramer
2013 - Patrick Griffith, Sharon Loving
2014 - Chris Carmichael, David Michener
2015 - Michael Dosmann, Sandy Tanck
2016 - Cynthia Druckenbrod
2017 - Scott Stewart, PhD
2018 - Richie Steffen, Elisabeth C. Miller Botanical Garden
2019 - Sarah Hedean, Smithsonian Gardens
