A hardy deciduous perennial. A relativly new introduction noted for it’s scent. Produces apple green growth in spring then spires of lilac-Blue flowers through summer into autumn. Faded flower stems can be left over winter and cut back in early spring to bring form to the border during winter months. Flowering period July – September. Height 70cm – 1m. Spread 40cm. Plant requires full sun in fertile well drained soil.