« All Events This event has passed. Lahr Native Plant Symposium March 24, 2018 @ 9:00 am - 4:00 pm « Northern VA Nursery and Landscape Association Re-imagining an Urban Woodland Garden: A Lens on Dumbarton Oaks Park » Registration opens in February. CBLP CEUs will be available. Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: March 24, 2018 Time: 9:00 am - 4:00 pm Website: https://www.fona.org/lahr-symposium/ Venue US National Arboretum 3501 New York Ave. NE Washington, DC 20001 + Google Map