A robust herbaceous perennial with upright stems to 1.2m tall, clad in narrow, willowy leaves, and small vivid purplish-pink flowers 2cm wide in dense terminal spikes over a long period in summer ...
Vigorous herbaceous perennial forming an extensive colony of erect stems to 1m in height, with narrow, greyish leaves. Small greyish-white flowers are borne in slender terminal spikes ...