30cm. Large,thick, rounded leaves, with ciliate margins, colour in autumn before disappearing. Sprays of white flowers are produced in Spring, ageing to pink. Humus-rich, well-drained soil, best in part shade.
Has been hardy with me for getting close to 20 years, and we’ve had some fairly cold weather in that time! The seed originally came from a Chris Chadwell expedition to the Himalayas.