Allium 'Haarlem Superglobe'

Plants for pollinators
Bulbs

Hybrid group of perennial, bulbous plants, producing densely-packed spherical heads of star-shaped flowers, in shades of pink, purple or white, on straight stems to 70cm tall in May and June, above short-lived, mid-green leaves. The foliage is often wilting and turning brown when the flowers appear, and for best visual effect, the bulbs should be sited so that adjacent plants can grow to conceal the leaves as they die back. The flowers are extremely attractive to bees and other pollinating insects, making the plant a wonderful addition to a wildlife garden.

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
H5

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
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

Easy to grow in full sun and a fertile well-drained soil. It is best to grow in containers where garden soil is heavy clay and prone to saturation over winter. See allium cultivation

Propagation

Propagate by offsets to obtain plants the same as the mother bulb, which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation. Propagation by seed may not produce plants that are true, as this is a hybrid plant

Suggested planting locations and garden types

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

Pruning

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

Pests

May be susceptible to slugs, snails and allium leaf miner

Diseases

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