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Allium Bulbs (Small) - Blue Caeruleum

Allium Bulbs (Small) - Blue Caeruleum

Plant in Fall Pre-Order; Ships Fall 2023
When will these bulbs ship to me?
Size Price Savings Quantity
20 Bulbs Fall-Planted | Ships in Fall $18.99
40 Bulbs Fall-Planted | Ships in Fall $32.99 13% Savings
100 Bulbs Fall-Planted | Ships in Fall $72.99 ($0.73/each) 23% Savings
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  • The rarest flowering onion, these blue blooms are a hit among pollinators
  • Easy to Grow Pollinator Attractor, Perfect for Beds, Borders and Cottage Gardens
  • Numerous Small Star-Shaped Blooms that Form Globe-Shaped Clusters
  • Wild Ornamental Flowering Onion, Deer-Resistant Perennial
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Life Cycle Perennial
Planting Season Fall
Color Blue
Growth Habit Clumping
Bloom Season Early Summer

Plant Characteristics Attracts Bees, Attracts Butterflies, Attracts Pollinators, Easy to Grow & Maintain, Fragrant
Use Container Garden, Cut Flower Garden, Dried Flowers
Growing Conditions Drought Tolerant, Outdoor
Plant Resistance Deer, Rabbit

About Allium Bulbs (Small) - Blue Caeruleum

Allium azureum or Allium caeruleum

Seed Type Bulb
Plant Type Small
Also known as Blue Globe Onion, Blue Ornamental Onion, Blue-Of-The-Heavens, Blue-Flowered Garlic

Allium blooms are unique and eye catching enough in the garden, but Allium Caeruleum brings a little something extra--a vivid, true blue flower! Also known as Persian Onion, or Blue Onion, this lovely perennial is one you won't want to pass up!

Planting Information

Planting Allium Bulbs (Small) - Blue Caeruleum

Planting Season Fall
Light Requirement Full Sun, Partial Shade
Planting Depth 2-3 inches deep
Plant Height 14 to 16 inches
Plant Spacing 5 to 6 inches
Water Needs Average
Hardiness Zones 4, 5, 6, 7, 8, 9
Bulb Size 4-5 cm circumference
View our Allium Planting Guide to learn more.


Recommended Coverage
20 Bulbs / Fall-Planted | Ships in Fall Up to 2 Sq. Ft
40 Bulbs / Fall-Planted | Ships in Fall Up to 4 Sq. Ft
100 Bulbs / Fall-Planted | Ships in Fall Up to 10 Sq. Ft

Companions Plants

Companion Plants for Allium Bulbs (Small) - Blue Caeruleum