Jerusalem Artichokes are perennials closely related to sunflowers which prefer a temperate climate to the heat of the South. They are grown for their roots which are similar to potatoes. The plants were first described in 1805 when Lewis and Clark were served them by Indians living in the Dakotas. Depending on the variety, plants can grow to be 5-9 ft. tall. To plant, cut tubers into pieces each with several growing buds. Plant 5 inches deep, 2 ft. apart in rows 3 ft. apart. Leave in ground until ready to harvest. Freezing improves the flavor.