A large perennial herb naturalised in marshes, by streams and on roadsides, and found as a casual in drier habitats. It arises as a garden escape. Lowland.
C. oleraceum was being grown in Britain by 1570, but is only rarely grown in gardens now. It was recorded from the wild in 1894 (Fife), and has been known by the River Tay (E. Perth) since 1912.
C. oleraceum has a Eurosiberian Temperate distribution; it is rare as a native in oceanic W. Europe.
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.