Dark Knight Bluebeard Caryopteris x clandonensis 'Dark Knight' Description Blooms blue-purple flowers. Compacted stems with gray-green fragrant foliage.Bloom Period: Summer Growth Habit: Compact and mounded Mature Height: 2' to 3' (61 cm to 91 cm)Mature Spread: 2' to 3' (61 cm to 91 cm)Growth Rate: Fast More Details Sun Exposure: Full SunCold Hardiness Zone: 5Attracts butterflies, hummingbirds and bees Deer resistantDrought TolerantCut flowerLandscape Uses: Hedge or garden accent