Herbaceous Perennial
A clump-forming, woody-based perennial with wrinkled, oval leaves to 20cm in length, and erect stems bearing long spikes of violet-blue, rarely pink or white, flowers 2-3cm long, in early and midsummer
Position
Full sun
Soil Types
Chalk, Loam, Sand
Max Height
0.5-1 metres
Max Spread
0.1-0.5 metres