Allium Round and Purple (Ornamental Onion)

Giant Allium ‘Round and Purple’ is a spectacular addition to the garden with its star-shaped lavender flowers forming a 6-inch wide (15 cm) globe-shaped cluster. These are probably the biggest flower heads of all Alliums. Blooming in late spring to early summer, this striking bulbous perennial enjoys long-lasting blooms and remains ornamental in the garden well into summer.

Giant Allium 'Round and Purple' is a spectacular addition to the garden with its star-shaped lavender flowers forming a 6-inch wide (15 cm) globe-shaped cluster. These are probably the biggest flower heads of all Alliums. Blooming in late spring to early summer, this striking bulbous perennial enjoys long-lasting blooms and remains ornamental in the garden well into summer.

  • Growing up to 36 inches tall (90 cm), this beauty naturalizes easily and will come back year after year!
  • Easily grown in rich, sandy to gritty, dry to medium moisture, well-drained soils in full sun. This Allium is drought tolerant.
  • Known for attracting bees, butterflies, ​moths, and other pollinators, but deer ignore it.
  • Stunning in beds, borders, and cottage gardens. Spectacular in large sweeping drifts. Plant in groups (at least 10 to 15 bulbs) for the best visual impact. Excellent as cut flowers for both fresh and dried arrangements!
  • Mixes beautifully with other late spring flowering bulbs and creates stunning combinations with pink or white delphiniums, peonies, or irises.
  • To be planted in fall.

Requirements

Hardiness 4
– 8

Plant Type Bulbs
Plant Family Allium
Exposure Full Sun
Season of Interest Spring (Late)Summer (Early)
Height 2'
– 3'
(60cm
– 90cm)
Spread 1'
– 2'
(30cm
– 60cm)
Spacing 8″ (20cm)
Depth 8"
(20cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Fragrant, Showy
Tolerance Deer, Drought, Rabbit
Attracts Bees, Butterflies
Garden Uses Beds and Borders
Garden Styles Formal Garden, Informal and Cottage