RHS 1999 An upright perennial to 45cm in height, with white-woolly branched stems bearing oblong mid-green leaves, white-hairy beneath; deep indigo-black flowers 2.5cm in length with contrasting white-downy calyces, are produced in late summer and early autumn
Position
Soil Types
Max Height
0.1-0.5 metres
Max Spread
0.1-0.5 metres