45-acre accredited living museum is the "eye-popping showcase for native plants" of New England Wild Flower Society, America's oldest plant conservation organization. Enjoy guided walking tours of gardens and habitats weekdays at 10 am, weekends at 2pm. Featuring over 1,000 native plant species plus unique New England Garden of Rare and Endangered Plants. Open April 15 through October, Tuesday through Sunday plus holiday Mondays 9 am-5pm. Learn, Grow, and Protect! Native Plants for sale at eco-friendly Garden Shop.