Agastache ‘Black Adder’

Agastache ‘Black Adder’ originates from North American species like Agastache rugosa, although ‘Black Adder’ itself is a horticulturally developed cultivar, selected specifically to produce darker, more vibrant flower spikes. The genus Agastache comes from the Greek words ‘agan’ meaning ‘very much’ and ‘stachys’ meaning ‘ear of grain’, reflecting the flower spike’s shape. Historically, native species have been used for culinary and medicinal purposes by indigenous peoples due to their aromatic foliage and soothing properties.

Despite their North American roots, cultivars such as ‘Black Adder’ are now widely grown across Britain and Europe as decorative garden perennials, prized for ornamental appeal and attractiveness to pollinators.