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Allium 'Gladiator' AGM

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© RHS 1999

Characteristics

Plant type

Bulb

Fragrance

Leaf

Toxicity

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Red and Pale Purple in Summer

Foliage

Green in Spring and Summer

Size

Ultimate height

1-1.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

allium 'Gladiator'

Family

Alliaceae


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

'Gladiator' is a bulbous perennial to 1.2m in height, with erect, strap-shaped leaves and rounded clusters of starry light reddish-purple flowers in early summer

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing, North-facing, West-facing or East-facing
  • Sheltered

Cultivation

Easy to grow in fertile well-drained soil. Add grit when grown in clay soils to improve drainage

Soil

  • Well-drained or Moist but well-drained
  • Acid, Alkaline or Neutral
  • Chalk, Clay, Sand or Loam

Propagation

Propagate by seed, sowing in containers in a cold frame when just ripe or in the spring. Alternatively, remove offsets in autumn

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Cut Flowers


How to care

Pruning

No pruning required

Pests

Generally pest free

Diseases

Generally trouble-free: Onion white rot and a downy mildew may occur