Allium stipitatum 'White Giant'

RHS Plant Profile
allium 'White Giant'

Synonyms

Allium 'White Giant'

Plants for pollinators
Bulbs

A bulbous herbaceous perennial, 1.1-1.5m high, with green stems, green basal leaves which die back in summer, and dense umbels, 10-15cm across, of hundreds of starry white flowers in early summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Sheltered
Hardiness
H5
Drought Resistance
Yes

Colour & Scent

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Amaryllidaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
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
Accepted

How to Grow

Cultivation

Plant bulbs in early autumn, 20cm apart and at a depth of about four times the diameter of the bulb, in well-drained soil in full sun; for more advice, see Allium cultivation

Propagation

Propagate by division, removing offsets, in autumn

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Gravel garden
  • Wildlife gardens
  • Low Maintenance
  • Cut flowers
  • Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free, but may be susceptible to slugs, snails, allium leaf miner, and onion pests such as onion fly

Diseases

Generally disease-free, but may be susceptible to onion diseases such as onion white rot and onion downy mildew