Helianthus tuberosus 'Fuseau'

RHS Plant Profile
Jerusalem artichoke 'Fuseau'

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Herbaceous Perennial
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A tall, herbaceous perennial to 2m or more, with green leaves and small, yellow sunflowers in late summer-autumn. It is grown for its edible roots which are smoother and thin-skinned compared to the species type

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
1–2 years
Max Spread
0.5-1 metres
Max Height
1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming, Columnar upright
Genus
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
Name Status
Accepted

How to Grow

Cultivation

Grow in any water-retentive soil with good drainage. Flowering will be better in full sun, but for maximum harvest, flowering should be avoided so some shade is good. Choose a sheltered spot as the tall plants can blow over in the wind. May have the potential to become a nuisance if not managed well. For more advice see Jerusalem-artichoke cultivation

Propagation

Propagate from division of tubers

Suggested planting locations and garden types

  • Cottage and informal garden
  • Prairie planting
  • Wildlife gardens
  • Cut flowers

Pruning

No pruning required

Pests

May be susceptible to damage from slugs and snails

Diseases

Generally disease-free