A magnet for bees and butterflies. Position: full sun Soil: well-drained, fertile soil Rate of growth: average Flowering period: July to October Hardiness: frost hardy (may need winter protection) Chunky spikes of deep violet-blue flowers appear over a long period from midsummer attracting a host of beneficial insects, so it's perfect for a wildlife-friendly garden, while the rich green insects, so it's perfect for a foliage, which releases its liquorice-like aroma when gently bruised, makes it valuable for sensory gardens. Garden care: Don't cut back the faded flower-stems until early spring, as they provide interest in the winter months. Lift and divide congested colonies in spring.
