Attracts butterflies in their droves. Position: full sun or partial shade Soil: fertile, well-drained soil Rate of growth: fast-growing Flowering period: July to September Hardiness: fully hardy The bicoloured flowers of this new buddleja really caught our buyer's eye. They appear in tapering cone-shaped clusters up to 20cm in length, and they are packed with flowers - some solid purple, some solid white, but the majority being a mix of the two. A magnet to butterflies, it will add colour from midsummer to early autumn. Garden care: Prune back hard in March, removing all of the previous year's growth to three or four buds.