Blue globe onion

Allium caeruleum

Photo/Illustration: 
Steve Aitken
Photo/Illustration: 
Steve Aitken
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
Blue globe onion (Allium caeruleum)
AL-ee-um sir-EW-lee-um
Genus:  Allium
This plant produces dense clusters of bright blue flowerheads up to 1 inch wide. Its leaves clasp its stem and die back before flowering.
Care:  Provide full sun and well-drained, average to dry soil.
Propagation:  Sow seed in spring in containers or in situ. Divide clump-forming plants in spring.
Problems:  Bulb rot in damp conditions. Onion fly and thrips.

Overview

Height
1 ft. to 3 ft.
Spread
6 in. to 12 in.
Growth Habit
Clumps
Growth Pace
Fast Grower
Light
Full Sun Only
Moisture
Dry to Medium
Maintenance
Low
Characteristics
Showy Flowers,
Showy Seed Heads
Bloom Time
Early Summer,
Summer
Flower Color
Blue Flower
Uses
Beds and Borders
Style
Cottage Garden,
Meadow Garden,
Rock Garden
Seasonal Interest
Summer Interest
Type
Bulbs

Related Plants to Allium caeruleum

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
Drumstick allium
Allium sphaerocephalon
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
Ornamental onion
Allium senescens
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
Circle onion
Allium senescens var. glaucum
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
Camassia leichtlinii ssp. suksdorfii 'Blue Danube'