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 Blue Caeruleum - Allium Bulbs (Small)

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 caeruleum, aka Blue or Persian allium, is absolutely lovely with its sky-blue blooms made up of dozens of tiny, star-shaped flowers. Blue alliums grow from 14 to 16 inches tall, and their globes are about an inch across. These long-lasting bulbs grow and spread slowly, so plant them in clusters for a really eye-catching effect! Like all alliums, Blue alliums are in the onion family and their scent works great at deterring deer and other critters. And they're pollinators, so bees and other insects love them! Plant them in the fall, and keep an eye out in late spring as they slowly wash your garden in blue!

Planting Information

Planting Blue Caeruleum - Allium Bulbs (Small)

Planting Season Fall
Light Requirement Full Sun, Partial Shade
Planting Depth 2-3 inches deep
Plant Height 14 to 16 inches
Plant Spacing 3 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
100 Bulbs / Fall-Planted | Ships in Fall Up to 10 Sq. Ft
20 Bulbs / Fall-Planted | Ships in Fall Up to 2 Sq. Ft
40 Bulbs / Fall-Planted | Ships in Fall Up to 4 Sq. Ft

Companions Plants

Companion Plants for Blue Caeruleum - Allium Bulbs (Small)

Aesthetic or Culinary