2003 - Ganna Walska Lotusland
2004 - Missouri Botanical Garden
2005 - Olbrich Botanical Gardens
2006 - Chicago Botanic Garden
2007 - Chanticleer Foundation
2008 - Bloedel Reserve
2009 - Betty Ford Alpine Gardens
2010 - Smithsonian Gardens
2011 - Bok Tower Gardens
2012 - Springs Preserve
2013 - Sarah P. Duke Gardens
2014 - Longwood Gardens
2015 - Ladybird Johnson Wildflower Center, Luci and Ian Family Garden
2016 - Crosby Arboretum
2017 - Naples Botanical Garden
2018 - Denver Botanic Garden
2019 - Brookgreen Gardens
2020 - Portland Japanese Garden
2021 - Atlanta Botanical Garden
