The garden peaks in June, when the dainty bells of the lavender-colored Betty Cornings are rampant, and varieties of astilbe bloom from pinkish white to deep red throughout. The museum hosts events in the garden, as well as opening it to museum visitors. There’s a Father’s Day Tea on June 15 and occasional “Garden Amusement” events, including one on July 24 featuring 19th-century fortune telling. ...