Chanticleer, a forty-eight-acre garden on Philadelphia's historic Main Line, is many things simultaneously: a lush display of verdant intensity and variety, an irreverent and informal setting for inventive plant combinations, a homage to the native trees and horticultural heritage of the mid-Atlantic, a testament to one man's devotion to his family's estate and legacy, and a good spot for a stroll and picnic amid the blooms. In Chanticleer:...