Glaucum Allium
Glaucum Allium
Curly Blue-Gray Foliage and Pink Summer Flowers
Glaucum Allium (Allium 'Glaucum'), the corkscrew or curly chives, is a charming low ornamental onion grown as much for its foliage as its flowers. Slender, blue-gray leaves twist and spiral into a swirling low mound, then soft pink flower clusters appear in summer to feed bees and butterflies. Its small size and unique texture make it ideal for rock gardens, edging, and containers. Tough, drought-tolerant, and deer-resistant, it's a fun, easy accent for sunny Edina, Maple Grove, and Woodbury gardens.
| Attribute | Detail |
|---|---|
| Botanical Name | Allium 'Glaucum' (corkscrew allium) |
| Mature Size | 6–10 in tall, 8–12 in wide (dwarf) |
| Hardiness Zone | Zone 4–8 (hardy across most of Minnesota) |
| Light | Full sun |
| Bloom Time | Summer |
| Flower Color | Soft pink clusters over blue-gray foliage |
| Soil | Average to lean, well-drained; tolerates dry soil |
Landscape Uses
Use Glaucum in rock gardens, troughs, edging, and containers, and at the very front of sunny borders where its swirling foliage can be appreciated up close. It pairs beautifully with sedum, hens-and-chicks, and other small sun lovers.
Best Time to Plant
Plant in spring or early fall, when cooler weather and steady moisture help roots establish.
How to Plant
Dig a hole twice as wide as the root ball and just as deep. Set the crown level with the soil, backfill, water in well, and mulch lightly. Choose a sunny, well-drained spot.
Watering
First Year: Water deeply once a week to establish the roots.
After Year One: Water during dry spells. It's very drought tolerant once established.
Drip Irrigation: A drip line provides efficient, low-water moisture.
Frequently Asked Questions
Why is it called corkscrew allium?
Its slender blue-gray leaves twist and spiral, giving a distinctive curly, swirling texture.
Is it good for pollinators?
Yes, the pink summer flowers attract bees and butterflies.
Is it hardy in Minnesota?
Yes, hardy to Zone 4 and reliable across most of the state.
Is it deer resistant?
Yes, the onion scent makes alliums highly deer- and rabbit-resistant.
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Pair Glaucum with sedum, hens-and-chicks, and our other alliums for a sunny, low-care rock or edging garden.
How Many Glaucum Allium Do I Need?
This dwarf, 6–10 inch allium shines when planted in tight clusters at the very front of a bed or in a rock garden. Space plants about 10 inches apart:
| Edging Length | Plants Needed (at ~10 in) |
|---|---|
| 10 ft | 12 |
| 20 ft | 24 |
| 30 ft | 36 |
| 40 ft | 48 |
For the best swirling-foliage effect, plant in clusters of 5–7 rather than singly.
Glaucum Allium Season-by-Season in Minnesota
- Spring: Curly blue-gray leaves emerge and twist into a low, swirling mound.
- Summer: Soft pink flower clusters rise above the foliage and feed bees and butterflies.
- Fall: Foliage stays tidy and blue-gray; dried seed heads add small-scale texture.
- Winter: Dies back to the bulb and returns reliably each spring, hardy to zone 4.
At a Glance
✔ Pollinator-Friendly ✔ Deer-Resistant ✔ Drought-Tolerant
Plant It With
- Blue Eddy Allium — another curly, dwarf ornamental onion for a rock-garden grouping
- Autumn Fire Sedum — fleshy drought-tough foliage that loves the same lean, sunny spot
- Boulder Blue Fescue — a tidy blue grass tuft that echoes the foliage color
- Firewitch Dianthus — low magenta-pink, clove-scented mats for a sunny front edge
Is Glaucum Allium Right for Your Yard?
Glaucum Allium is perfect for a hot, sunny, well-drained spot — rock gardens, troughs, containers, and the front of lean borders. Its onion scent keeps deer and rabbits away. Not a fit for shady, rich, or soggy ground, where the bulb is prone to rot and the foliage flops.