P. Stately perennials with handsome ornamental foliage for deep, well-drained soils. (In architecture acanthus is the sculpturedwhich characterises the pillars of Corinthian architecture.) They are slow growers and do not usually succeed on heavy land unless this is lightened by working in plenty of , peat etc. Acanthus mollis is the best known species. On favourable soils it reaches 4 ft. The large, heart-shaped may be as much as 1 ft. wide, the tubular being white or rose. A. m. latijolius is a more robust form with extra large . Propagation is by division in March.