Garden Events in the DMV Here are some websites that regularly offer listing of garden events in the area. American Horticultural Society Events & Programs DUG DC Urban Gardeners Network Events Pegplant – Local Monthly Events United States National Arboretum Calendar of Events & Programs What’s Happening at Smithsonian Gardens Exhibits and Events Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)