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Millenium Ornamental Onion - Bare Root Plant

$12.70
$12.70 $23.36
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Size : Bare Root Plant
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Bare root arrives dormant

Expect new growth in about 6 weeks after planting. Until then it can look lifeless, so you won’t be able to tell within 24 hours of arrival whether it will grow.

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About the Product

Millenium is one of the most dependable summer-blooming ornamental onions, named Perennial Plant of the Year in 2018. In late July and August it produces a profusion of 2-inch, bright rosy purple globes on strong stems just above the foliage.

The glossy green, strappy leaves form a compact, upright clump that stays attractive all season. At 15 to 20 inches tall, it is perfect for the front of a border, rock gardens and containers. Butterflies and bees love it, deer and rabbits do not, and it shrugs off drought once established.

What it looks like

Tightly rounded flower heads about 2 inches across packed with many small starry florets in bright rosy purple, held on strong, straight green stems just above the leaves. Leaves are glossy, medium green, thick and strap-like, forming a neat, upright tuft. The plant is 15 to 20 inches tall and 10 to 15 inches wide. At peak bloom it is crowded with rosy purple balls, often busy with bees and butterflies.

Growing it with lavender

Millenium thrives in the same full sun and lean, well-drained soil as lavender, and its rosy purple globes carry purple color through late summer at the front of a lavender bed.

Care

Grow in full sun to part shade in lean to average, well-drained soil; it handles drought once established. Hardy in USDA zones 4-8. Trim off any tired foliage in fall or early spring; clumps can be divided in spring every few years.

At a glance

  • Botanical name: Allium
  • Flower color: Bright rosy purple
  • Foliage: Glossy medium green
  • Growth habit: Compact, upright clump
  • Mature size: 15–20 in tall × 10–15 in wide
  • USDA hardiness zones: 4–8
  • Light: full sun, part sun to part shade
  • Bloom start: Late-July
  • Peak bloom: Early-August
  • Bloom pattern: Single Flush
  • Deer resistance: Resistant
  • Pollinator value: Excellent

Sizes and shipping

Dormant bare-root plant, sold in boxes of 25 per variety (order in multiples of 25). Bare-root plants ship or are picked up March 1–May 31 only. They are soil-free, so they may ship to every state in that window. Dormant plants often show little or no top growth on arrival; plant or heel them in promptly.

View Product Details
Mature height
20.0 in
Mature spread
15.0 in
Bloom
Late-July – peak Early-August
Fragrance
Mild
Deer
Resistant

Lavender companion · grow guide

How to grow Millenium

Ornamental Onion · Allium

Give these clump-forming summer alliums full sun and well-drained soil. Once settled they shrug off drought, heat, deer and rabbits and bloom in mid to late summer.

Check my zone & planting dates
Millenium
  • Full sunLight
  • Low waterFast drainage
  • pH 6.0–7.5Soil
  • Zones 4a–8bHardiness
  • 20″ tall15″ wide
  • ResistantDeer · rabbits resistant
  • Toxic to petsPets
Huckleberry, the farm dog

Huckleberry saysTell me where you grow and I’ll check if Millenium will thrive there.

Hardy in zones 4a–8b

Spring or early fall, at least 6 weeks before the ground freezes.

Dormant bare-root clumping ornamental onion (allium) as it arrives, laid on burlap

When it arrives

Your bare-root plant

You'll get a cluster of small, slender bulbs joined at the base, with stringy roots and maybe cut-back leaves. Soak roots 30 minutes, then plant right away, bulbs just below the surface. Keep cool and slightly moist if you must wait a few days.

Expect new growth in about 6 weeks after planting. Bare root ships March–May while dormant, with little or no top growth, and it can look lifeless until then. That’s normal. Grassy green tufts come up in mid-spring (April in Michigan). Flower stems follow in early summer and bloom July to September depending on variety. Foliage that yellows a bit in late fall is normal.

You won’t be able to tell within 24 hours of arrival whether a dormant plant will grow.

When to plant

Spring or early fall, at least 6 weeks before the ground freezes.

How deep

Set the clump so the tops of the small bulbs sit just below the soil surface and the leaf bases are at soil level. Spread the roots downward; don't bury the foliage.

Spacing

12–18 inches apart for most; larger types up to 24 inches.

Soil

Sandy, loam or gravelly; clay if amended · pH 6.0–7.5

Fix-it tip: Wet soil rots the bulbs. In clay, work in compost and plant on a slight mound or in a raised bed so water never sits around the clump.

Sun

Full sun (tolerates light part shade).

Less than 6 hours of sun gives floppier foliage and fewer, smaller flower globes.

Dormant
New growth

Don’t give up on it

Is it alive? What spring looks like

Grassy green tufts come up in mid-spring (April in Michigan). Flower stems follow in early summer and bloom July to September depending on variety. Foliage that yellows a bit in late fall is normal.

Care details are written for the whole ornamental onion group; a few are our best general guidance rather than cultivar-specific testing.

Sources

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