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).
A. procera has been much confused in the past with A. eupatoria var. sepium, which can also be glandular and aromatic. The overall range is little changed since the 1962 Atlas. The apparent increases in East Anglia, W. Scotland and elsewhere are probably attributable to recorders` increased familiarity with this species.
European Temperate element.