A very large perennial herb occurring in derelict gardens, neglected urban places and waste ground, on rubbish tips, roadsides and by streams and rivers, forming large colonies if allowed to prosper. It spreads by seed, which is prolifically produced. Lowland.
A robust perennial herb of dry or moist, neutral to calcareous soils. It has a wide habitat range, including rough and disturbed grassland, especially on roadsides and trackways, woodland rides, scrub, river banks, stabilised dunes, coastal cliffs, montane tall-herb vegetation and waste ground. 0-1005 m (Breadalbanes, Mid Perth).