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Blue globe onion

Allium caeruleum

AL-ee-um sir-EW-lee-um

This plant produces dense clusters of bright blue flowerheads up to 1 inch wide. Its leaves clasp its stem and die back before flowering.

CareProvide full sun and well-drained, average to dry soil.

PropagationSow seed in spring in containers or in situ. Divide clump-forming plants in spring.

ProblemsBulb rot in damp conditions. Onion fly and thrips.

  • Genus : Allium
  • Plant Height : 1 to 3 feet
  • Zones : 10, 4, 5, 6, 7, 8, 9
  • Plant Width : 6 to 12 inches
  • Plant Type : Bulbs
  • Moisture : Dry to Medium
  • Bloom Time : Early Summer, Summer
  • Growth Rate : Fast
  • Light : Full Sun
  • Maintenance : Low
  • Characteristics : Showy Seed Heads
  • Plant Seasonal Interest : Summer Interest

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