Vigorous shade lovers fill in the nooks around full-size trees.Tree branches provide a casual edging between garden plants and path.Nearly hidden from view, a rustic wood bench offers a restful slice under the tree canopy.Bright pink and red impatiens -- which love shady environs -- pop against the mostly green and white plants.Intermittent plantings of caladium picks up on the bright visual blooms of the impatiens.