National Arboretum NATIVE PLANT SALE (and LAHR Symposium) at the 2400 R Street NE entrance  Washington, DC 20002 Saturday, March 25, 2023, 8:15 a.m. –2 p.m. Where: Meadow Road, adjacent to the National Herb Garden Vendors from across the mid-Atlantic selling spring ephemerals and many other choice perennials and woody plants. Registration is helpful but not […]