(Dioscorea batatas) Cinnamon scented flowers and heart shaped leaves adorn this vigorous deciduous vine. In the mountains of northern China it produces very large, highly prized, white fleshed tubers with a nutty potato flavor. While the top dies back each November, the tubers can be left in the ground for several years to keep growing. One gallon pot. This plant is self fertile and grows in USDA Zones 4-8.