Striking dark purple-blue panicles bloom in the heat of summer when most plants are done flowering, filling your garden with captivating color. This carefree plant is also excellent for cut-flower arrangements! This hardy bush stands 8-10 ft. tall when mature, has a wonderful honey-sweet aroma and attracts lots of hummingbirds and butterflies. Hardy and deer resistant, Black Knight Butterfly Bush performs best in full sun to partial shade, and dryer soils. Zones 5-9.