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Life Cycle Perennial
Planting Season Fall
Color Purple
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 Giganteum - Allium Bulbs (Giant)


Seed Type Bulb
Plant Type Giant
Also known as Giant Onion, Ornamental Onion, Flowering Onion

The Giganteum allium is true to its name. Towering at up to 5 feet tall, these lollipop lookalikes will really make your late spring and early summer garden stand out! Their gorgeous globes are made up of clusters of tiny, star-shaped purple flowers. Bees and butterflies love them, and their onion-y aroma keeps the pests away! Giganteums look great as a garden backdrop. They are perfect in flower arrangements, too—fresh or dried.

Planting Information

Planting Giganteum - Allium Bulbs (Giant)

Planting Season Fall
Light Requirement Full Sun, Partial Shade
Planting Depth 6 inches deep
Plant Height 48 to 60 inches
Plant Spacing 5 to 6 inches
Water Needs Average
Hardiness Zones 4, 5, 6, 7, 8, 9
Bulb Size 20-22+ cm circumference - Largest Size Commercially Available
View our Allium Planting Guide to learn more.


Recommended Coverage
10 Bulbs / Fall-Planted | Ships in Fall Up to 5 Sq. Ft
2 Bulbs / Fall-Planted | Ships in Fall Up to 1 Sq. Ft
4 Bulbs / Fall-Planted | Ships in Fall Up to 2 Sq. Ft

Companions Plants

Companion Plants for Giganteum - Allium Bulbs (Giant)

Aesthetic or Culinary