Groundnut

This valuable, native American, hardy perennial vine is prized for it nutty flavored, potato-like tubers. Once widely grown in North America, it is now a commercial crop in Japan. This vigorous vine can grow up to 15 feet in one season and produces attractive, reddish-brown flowers. Like potatoes, the tasty, walnut size tubers should be cooked before eating and are used similarly in many dishes. Cold Hardy to USDA Zone 5.