Description This is a different variety of Codonopsis from the medicinally used, Dang Shen … but it is a beautiful and dramatic vine. And I feel like it has potential as a medicinal… A super cold hardy vining herb (zone 2). Leaves are soft green and stems are delicate. Vines grow to about 10 feet in length. Flowers are more waxy – greenish-yellow bells – these are streaked in dramatic dark pink. Has a magical feel… Can be grown in large containers. Likes well drained soil and moderate fertility. Likes cool roots – a part shade position is best. Roots should be dug in fall once plants have gone dormant after three years of growth.