A perennial herb of basic and neutral soils, occurring in hedge banks, on woodland margins and rides, in field-borders and open grassland, on roadsides and railway banks, and sometimes in waste places. It reproduces and spreads by seed. 0-365 m (N.W. Yorks.).
An erect perennial herb found in similar habitats to A. eupatoria, including hedgerows, woodland margins and roadside verges, generally on soils which are neither strongly calcareous nor strongly acidic. 0-335 m (Fortingall, Mid Perth).