Jerusalem artichoke
Helianthus tuberosus L.
Jerusalem artichoke (Helianthus tuberosus) is a perennial aster-family herb 1.5-3 m tall; it has rough ovate leaves and yellow flower heads, and knobby underground tubers rich in inulin, grown as food, a functional vegetable and an ornamental.
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Jerusalem artichoke — stem and leafJerusalem artichoke — flower head
Jerusalem artichoke — leaf
Jerusalem artichoke — stem
Jerusalem artichoke — fruit
Jerusalem artichoke — tuberJerusalem artichoke — stem and leafJerusalem artichoke — flower headOverview
**Jerusalem artichoke** (Helianthus tuberosus), also called **sunchoke**, is a **perennial** herb of the aster family (Asteraceae), genus Helianthus, 1.5-3 m tall with slender, branching, roughly hairy stems. Its **leaves are alternate** (the lower ones opposite), ovate to lance-shaped with **toothed margins**, the surface as rough as sandpaper. The yellow **flower heads**, 5-10 cm across with many ray florets, grow in loose clusters at the top and open from late summer to autumn. The **fruit** is a small **cypsela**. Underground the plant forms **knobby, elongated tubers (tuberous rhizomes)** with white flesh that resemble ginger — this is the edible part. The species is native to **eastern North America** and is now grown worldwide.
Updated by lebachungtdh@gmail.com · 10/13/2026
The tubers are eaten as a **vegetable**: raw, boiled, stir-fried or pickled, with a mild, sweet and crisp flavour. Unlike the potato, the tuber stores carbohydrate as **inulin (a fructan)** — a soluble fibre that helps **stabilise blood sugar**, making it suitable for diabetics; the plant is also used as **fodder**, for **ethanol** production and as an ornamental. In many places it escapes cultivation and is regarded as an **invasive species**. It has not been assessed by the IUCN and is listed as Not Evaluated (NE).
Updated by lebachungtdh@gmail.com · 10/13/2026
Life cycle
From seed to productTuber sprouting
In early spring, the underground **tubers** sprout shoots that emerge from the soil.
Growth
Stems grow up to 1.5-3 m tall with **rough ovate leaves**, forming a dense clump.
Flowering
From late summer to autumn, **yellow flower heads** with many ray florets open in clusters at the top, attracting bees and butterflies.
Fruiting & new tubers
After flowering, the plant forms small **cypselae**; meanwhile the rhizomes swell into **new tubers** to survive the winter.
Distribution & origin
Share of recorded occurrences by region- Eastern North America (native)35%
- Europe (cultivated)20%
- Asia (cultivated)20%
- Other North America (introduced)15%
- Elsewhere (cultivated/escaped)10%
Chemical composition
Relative content in agarwood resin- Inulin (fructan)Soluble fibre, stabilises blood sugar40%
- Simple sugars (fructose)Gives the tuber its mild sweetness15%
- ProteinNotable content in the tuber15%
- Dietary fibreSupports digestion15%
- Minerals (potassium, iron)Potassium, iron, magnesium10%
- Vitamins (C, B1)Present in modest amounts5%
Uses
- Food: the **tubers** are eaten raw, boiled, stir-fried, roasted or pickled, with a mild sweet, crisp flavour.
- Functional food: thanks to **inulin**, the tubers suit **diabetics** and gut health and are processed into flour and fructo-oligosaccharide syrup.
- Fodder: the stems, leaves and tubers are used as **livestock feed**, especially for pigs and poultry.
- Biofuel: the sugar-rich tubers are fermented to produce **bioethanol**.
- Landscaping: the tall plant with late-summer **yellow flowers** is used as a living screen and garden ornamental.
Properties
- Morphology
- Tall rough stems; **ovate toothed leaves**; **yellow flower heads**; **underground tubers**
- Tubers & inulin
- The tuber stores carbohydrate as inulin instead of starch
- Ecology
- Vigorous, spreads by tubers, can become invasive
- Food & health
- Inulin stabilises blood sugar and supports digestion
Habitat & conservation
Jerusalem artichoke prefers **full sun**, a cool climate and loose, well-drained soil; it is cold-hardy and grows vigorously. Native to eastern North America, it now occurs along roadsides, on waste ground and riverbanks and is cultivated throughout temperate regions, sometimes spreading into invasive colonies.
Conservation
Jerusalem artichoke is not threatened but a common crop and wild plant, regarded as an **invasive species** in some areas. It has not been assessed by the IUCN and is therefore listed as Not Evaluated (NE).
References
- 1POWO — Helianthus tuberosus L. — Plants of the World Online (Kew), 2026
- 2GBIF Backbone Taxonomy - Helianthus tuberosus L. (key 3119175) — GBIF, 2026
- 3Wikipedia EN — Jerusalem artichoke — Wikipedia EN, 2026
- 4Wikipedia VI — Cúc vu — Wikipedia VI, 2026
- 5Wikipedia ZH — 菊芋 — Wikipedia ZH, 2026
- 6Ảnh: Helianthus tuberosus (flowers, leaves, stems) — Wikimedia Commons — Wikimedia Commons, 2026
- 7Ảnh: Helianthus tuberosus (fruit, tubers) — Wikimedia Commons — Wikimedia Commons, 2026