The alliance Geo-Alliarion includes thermophilous and nutrient-demanding vegetation types dominated by annual to short-lived perennial herbs. It occurs both in semi-natural and anthropogenic, partially shaded habitats, e.g. in fringes of forests and scrub, canopy openings of urban forests, parks, cemeteries, unmanaged gardens, disturbed stream banks, rubble of old buildings and along walls and fences. In the Czech Republic this vegetation type occurs mainly in colline areas.