1 Buddleia Davidii 'Empire Blue' in 9cm Pot Buddleja Butterfly Bush 'Empire Blue' is a large deciduous shrub with arching branches and lance-shaped leaves, white beneath. Flowers scented, violet-blue in elongated panicles at ends of current year's growth Growing Details Genus: Buddleia Species: Davidii Cultivar: 'Empire Blue' Skill Level: Beginner Exposure: Partial shade, Shade Hardiness: Hardy Soil type: Well-drained/light, Dry, Moist Height: 300cm Spread: 300cm