Rivulare means ‘growing by a stream’, though this highly sought after Cirsium will tolerate drier conditions. Blooms almost all year round. During winter cold it has a rest then starts afresh in the spring. Crimson thistles, resembling miniature doorknobs, are held high over a rosette of spiny foliage. A real bee magnet. Prefers sun in moist soil. Height 100cm (40”). Spread 60cm (24”). Hardy perennial. Delivery May onwards.