A rosette-forming perennial with narrow, evergreen basal leaves. Loose spires of outward-facing, cup-shaped, lilac-blue flowers appear in early and mid-summer.
Cut back after flowering to encourage a second flush of flowers.
May require staking in exposed sites.
Likes any moist but well drained soil in full sun or partial shade.
Height 50cm-1m x Spread 10cm-50cm