Ussurian Asiabell - Codonopsis ussuriensis - rare tuber vegetable - 25 seeds (NOT tubers)

This is a perennial climber to about 1,5m (=5ft) tall, Frost hardy to at least zone 6. It is native to East Asia (Japan, Korea and Russian Far East). The globose or oblong tubers (1-3cm = about 1 inch diameter) of this species are edible raw or cooked (it is used as vegetable). Very ornamental climber due to beauty flowers which appear in August. The seeds need GA3 treatment (2000ppm by 24 hours) or probably cold stratification to germinating. They should be sown shallowly or surface. Package 25 fresh seeds harvested in Autumn 2020 from my garden.