American Groundnut winds its way through the wet margins of eastern North America, threading up through streamside thickets and bottomland forests from zones 4 to 9. A perennial vine of the bean family, it can reach 8 to 16 feet in a season, and beneath the soil it produces a chain of starchy, walnut-sized tubers that were a critical food source for Indigenous peoples long before European settlement. The small, clustered flowers that appear in summer carry a faint sweet fragrance and are deeply colored in brown and copper tones — nothing showy, but rewarding to anyone who stops to look.

Grown from tubers planted two to three inches deep in early spring, it asks for moist, sandy or gravelly soil and something willing to be climbed. Mulching keeps weed pressure down while the vine establishes. It spreads by rhizome and will form colonies over time, which makes it a genuine commitment — best suited to a naturalized bank, a rain garden margin, or a wild hedgerow rather than a tidy border. Butterflies visit the flowers, and the plant's relationship with the landscape runs deep in ways that make it worth growing even if you never harvest a single tuber.