The private garden Pixie Perennials will be open for visitors on Sunday, Sept. 16, from 10 to 4, as part of the Garden Conservancy’s Open Days program. Visitors can also shop for plants and garden-related items at the site, which is at 200 Nod Hill Road. The event is rain or shine, and no reservations are required. Admission is $7, children 12 and under are free. Call 1-888-842-2442, or visit opendaysprogram.org for more information.