In the large tents on the lawn near the Visitor Center, shop for more than 200 species of native grasses, woodland, prairie, and savanna plants to purchase, while supplies last. Organized by Friends of the Arboretum, open to the general public. University of WI Arboretum 1207 Seminole Hwy. Madison, WI 53711 608/263-7888 or uwarboretum.org/events