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Allium carinatum subsp. pulchellum f. album
  • RHS AGM
  • RHS Plants for pollinators

white-flowered keeled garlic

Clump-forming, bulbous perennial to 60cm in height, almost evergreen, with narrow leaves on the lower part of the stem, the new leaves produced with the white, bell-shaped flowers that are borne in dense, elongated umbels, during midsummer

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer White Green
Autumn Green
Winter Green
Position
  • Full sun
Aspect

West–facing or East–facing or South–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Amaryllidaceae
Native to GB / Ireland
No
Foliage
Semi evergreen
Habit
Clump forming
Genus

Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem

Name status

Unresolved

How to grow

Cultivation

Grow in full sun and fertile well-drained soil. It is best to grow in containers where garden soil is heavy clay and prone to saturation over winter. Rapidly forms clumps but is not a nuisance. See allium cultivation

Propagation

Propagate by offsets which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Wildflower meadow
  • Wildlife gardens
  • Flower borders and beds
Pruning

No pruning required, other than to remove old flowered stems and foliage

Pests

May be susceptible to allium leaf miner and onion fly

Diseases

May be susceptible to onion white rot, and onion downy mildew

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