Jerusalem artichoke is a perennial sunflower native to North America that produces sweet, knobby tubers prized for their nutty flavor and crisp texture. Growing 6 to 10 feet tall in hardiness zones 3 through 9, this vigorous plant thrives in full sun to partial shade and tolerates drought, dry soil, and shallow rocky ground with minimal fuss. The tubers sweeten significantly after frost, making fall and winter harvest ideal, while showy golden flowers in late summer attract pollinators and birds to the garden.
24
Partial Sun
Moderate
3-9
120in H x 60in W
—
High
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The tubers grow sweeter after exposure to frost or two, which is why gardeners traditionally wait until October through December to harvest them. This cold-hardy perennial spreads eagerly, meaning tubers left in the ground will sprout into new plants the following spring, a trait that requires planning if you want to contain it. The tall plants produce cheerful flowers that support pollinators, and the tubers have thin, delicate skin that demands gentle handling to avoid bruising.
Jerusalem artichoke tubers are eaten raw, roasted, fried, or added to soups and stews. The crisp, slightly sweet flesh works well sliced thin into salads or braised as a side dish. They can be prepared much like potatoes but have a distinct nutty, earthy flavor. The tall plants with their golden flowers also serve ornamental purposes in the garden, and some gardeners use them to naturalize areas or create informal screens.
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Plant tubers directly into the garden after the last spring frost date or in fall after the first frost has occurred, spacing them 24 inches apart in well-drained soil.
Plant tubers directly into garden soil at a depth and spacing suitable for sunflower-type growth; tubers are the primary planting material rather than seeds.
Harvest tubers after frost has occurred, ideally between October and December, as the cold significantly increases their sweetness. Cut back the tops of the plants and use a garden fork to carefully lift tubers from the soil, working gently to avoid cutting the thin-skinned tubers or bruising them, which shortens their storage life. Brush away clinging soil before storing.
Remove browned and tattered seed heads, foliage, and plant stalks from the garden after the growing season to maintain appearance and reduce disease carryover. Staking may be necessary in exposed locations to prevent the tall plants from toppling in strong winds.
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“Jerusalem artichoke is native to the old fields, moist thickets, and forest margins across North America, with its original range likely extending from Newfoundland to Saskatchewan south through Georgia, Tennessee, and Arkansas. Over time, plants naturalized throughout the continent and are now found in all U.S. states. Despite its English common name, the plant has no connection to Jerusalem; the name likely derives from a corruption of the Italian word girasole, meaning sunflower. Indigenous peoples cultivated and valued these tubers long before European contact, and the plant eventually spread to Europe and around the world, becoming a reliable food source wherever it could be grown.”