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Cynara cardunculus (Scolymus Group) 'Romanesco' (Cardoon 'Romanesco')

Other names: Globe artichoke 'Romanesco', Cynara scolymus 'Romanesco'

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Variety or Cultivar
'Romanesco' is an upright, clump-forming, herbaceous perennial, often grown as an annual, with pinnatifid, nearly spineless, silvery-grey leaves and globe-shaped, edible, purple to purple-flushed, grey-green flower buds opening to purple, thistle-like flowers in summer and autumn.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
2 m 1.5 m 2-5 years
6 ft 4 ft 2-5 years

Where to grow

Soil type
  • Chalky
  • Loamy
  • Sandy
Soil drainage
  • Well-drained
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Full Sun
Aspect
  • East
  • West
  • South
Exposure
  • Sheltered

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Additional plant details

Cultivation

Plant in a fertile, well-drained soil in full sun with protection from strong winds. Water regularly in dry periods. Mulch in autumn once cut back. Harvest of buds depends upon when seed was sown.

Suggested uses

Architectural, Flower Arranging, Beds and borders, Cottage/Informal, Wildlife, Bees (attract & feed bees)

UK hardiness

H5

USDA zones

Zone 7, Zone 8, Zone 9

Sunset zone

8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Upright, Clump-forming

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

To grow for foliage only, remove flower stems as they emerge in summer. After first harvest, cut to the ground to encourage a second crop. Cut back in autumn.

Propagation methods

Seed, Division, Root cuttings

Propagation

Sow indoors from late winter to early summer. Direct sow in midsummer. Garden-collected seed may not come true to type.

Pests

Slugs

Snails

Black-fly

Diseases

Plant container grown plants in deep fertile, well-drained soil

Take root cuttings

Water regularly through dry periods

Divide and replant in spring

Plant container grown plants in a sunny sheltered spot

Protect in winter with dry mulch (in cold areas)

Cut back in autumn (optional)

Other plants

Plants in this Genus (9)

Cynara

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Cynara cardunculus 'Imperial Star'
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Cynara cardunculus 'Imperial Star' Cardoon 'Imperial Star'
Cynara cardunculus
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Cynara cardunculus Cardoon
Cynara cardunculus (Scolymus Group) 'Vert Globe'
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Cynara cardunculus (Scolymus Group) 'Vert Globe' Artichoke 'Vert Globe'
Cynara cardunculus (Scolymus Group) 'Romanesco'
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Cynara cardunculus (Scolymus Group) 'Romanesco' Cardoon 'Romanesco'
Cynara cardunculus (Scolymus Group) 'Violet de Provence'
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Cynara cardunculus (Scolymus Group) 'Violet de Provence' Cardoon 'Violet de Provence'
Cynara cardunculus (Scolymus Group) 'Violetto di Chioggia'
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Cynara cardunculus (Scolymus Group) 'Violetto di Chioggia' Cardoon 'Violetto di Chioggia'
Cynara cardunculus (Scolymus Group) 'Gros Vert de Laon'
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Cynara cardunculus (Scolymus Group) 'Gros Vert de Laon' Cardoon 'Gros Vert de Laon'
Cynara cardunculus dwarf
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Cynara cardunculus dwarf Dwarf globe artichoke
Cynara cardunculus (Scolymus Group) 'Violetto di Romagna'
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Cynara cardunculus (Scolymus Group) 'Violetto di Romagna' Cardoon 'Violetto di Romagna'
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Companion plants (1)

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Papaver orientale var. bracteatum
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Papaver orientale var. bracteatum Great scarlet poppy
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Related content

Discuss Cynara cardunculus (Scolymus Group) 'Romanesco' with other Shoot members
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