Slow growing clump forming herbaceous perennial related to the bellflowers. The purple flower buds form a puffy balloon and then open to a bell shape in late summer. The whole plant is used as a vegetable in Korea, and in China, Japan and Korea it has a long history of medicinal use. It lowers blood sugar and cholesterol levels in the liver and inhibits the release of histamine. It is used internally in the treatment of coughs with profuse phlegm, colds, bronchitis, pleurisy, pulmonary abscesses and throat infections. It is also used to treat hypertension and diabetes in Korea. The root of plants 2 - 3 years old are harvested in the spring or autumn, peeled and used fresh or dried .Suitable for full sun or part shade. Some moisture preferred. Ht 40cm. 9cm pot.