Adkins Arboretum holds sales events in April and September. 410-634-2847.
Cullowhee (North Carolina)
Sale in July. 800-928-4968.
Delaware Native Plant Society
Sale in November.
Green Spring Gardens Park (VNPS)
May and September. 703-642-5173.
Historic Bartram's Garden (Philadelphia)
Sale in May. 215/729-5281.
Irvine Natural Science Center (Stevenson, MD)
Sale in August. 410-484-2413.
Sale in June. 717-872-3030.
Sale in May. 202-537-6200.
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