Growing guide · Bulbs

Allium spp.

How to grow Ornamental Onion.

Purple globes on sticks. Bees approve.

Light
Full sun
Water
Low
Zones
4–8
Size
24–36 in. tall
Spacing
8–10 in. apart, in groups of five or more.
Pets
Not pet-safe; keep out of reach
Ornamental Onion

Light

Full sun.

Water

Water after planting. They like it on the dry side, especially in summer.

Planting and soil

Plant in fall, six weeks or so before the ground freezes, pointed end up. 6–8 in. deep.

Feeding

Bulb food in fall.

Pruning

Leave the seed heads standing; they dry well and look good into summer. Let the leaves fade on their own.

Through the year

Plant in fall. Leaves in early spring, blooms late spring to early summer, dried heads through midsummer.

If something's off

Rot in wet soil. Otherwise few problems.

Exclamation points, minus the punctuation.

Tall alliums with round flower heads up to 5 in. across, in light purple, deep purple and cream. They bloom between the tulips and the summer perennials, when beds tend to stall. Deer and rodents skip them.

Why we stock it: Height and structure in late spring, and the dried heads keep going.

Giant Allium Mixfrom $49.95 · Arrives alive, or we replace it