Helianthus tuberosus
Jerusalem artichoke
A tall, herbaceous perennial reaching 2.5m tall or more, with coarse hairy foliage and small, yellow sunflower-like flowers in summer. It is cultivated for its knobbly, elongated pale-cream or sometimes purple-tinted tubers
Size
Ultimate height
1.5–2.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Yellow | Green | ||
| Autumn | Yellow | Green | ||
| Winter |
Position
- Full sun
Aspect
West–facing or South–facing
Exposure
Exposed or Sheltered Hardiness
H5Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Bushy
- Genus
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
- Name status
Unresolved
- Plant range
- N America
How to grow
Cultivation
Plant tubers in spring in a moderately fertile, moist but well-drained soil in full sun. Plants may need support in exposed positions. May have the potential to become a nuisance if not managed well. For more advice follow jerusalem-artichoke cultivation
Propagation
Propagate by separating and replanting tubers
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- Hedging and screens
- Flower borders and beds
Pruning
Cut back old stems after flowering as they die down for the winter
Pests
Diseases
May be susceptible to powdery mildews and sclerotinia disease
Get involved
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