Windy City Allium
Windy City Allium
Rosy-Purple Summer Globes on a Tidy Clump
Windy City Allium (Allium 'Windy City') is a well-behaved, clumping ornamental onion that crowns grassy green foliage with rounded rosy-purple flower globes in mid to late summer. Unlike spring bulb alliums, it forms a neat perennial clump that doesn't flop or spread aggressively, and its blooms are a magnet for bees and butterflies. Tough, drought-tolerant, and deer-resistant, it's an easy, long-blooming choice for sunny Edina, Maple Grove, and Woodbury borders.
| Attribute | Detail |
|---|---|
| Botanical Name | Allium 'Windy City' |
| Mature Size | 18–24 in tall, 12–18 in wide |
| Hardiness Zone | Zone 4–8 (hardy across most of Minnesota) |
| Light | Full sun |
| Bloom Time | Mid to late summer |
| Flower Color | Rosy-purple globes |
| Soil | Average, well-drained; tolerates dry soil |
Landscape Uses
Use Windy City in pollinator and sunny borders, mass plantings, and containers. Its neat clumping habit and long bloom pair beautifully with coneflowers, ornamental grasses, and sedum, and the flowers are great for cutting.
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 2–3 inches deep.
Watering
First Year: Water deeply 1–2 times per week to establish the roots.
After Year One: Water during dry spells. Allium is quite drought tolerant once established.
Drip Irrigation: A drip line provides efficient, low-water moisture.
Frequently Asked Questions
Does it spread or flop like bulb alliums?
No, it forms a tidy clump that stays put and holds its shape without flopping.
Is it good for pollinators?
Yes, the summer globes are a favorite of 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.
You May Also Like
Pair Windy City with Millenium and Summer Beauty allium, coneflowers, and grasses for a pollinator-friendly summer border.
How Many Windy City Allium Do I Need?
Windy City stays a tidy clump 12–18 in wide, so space plants about 15 inches apart for a connected edge or sweep. For accents, plant in groups of 3–5.
| Bed / Run Length | Plants Needed (at ~15 in apart) |
|---|---|
| 5 ft | 4 plants |
| 10 ft | 8 plants |
| 15 ft | 12 plants |
| 20 ft | 16 plants |
Windy City Allium Season-by-Season in Minnesota
- Spring: Grassy blue-green foliage emerges in a neat mound.
- Summer: Rounded rosy-purple globes crown the clump mid to late summer and swarm with bees and butterflies.
- Fall: Spent globes dry to tan seed heads that hold their shape for cutting or fall interest.
- Winter: Foliage dies back; the clump rests dormant and returns without spreading.
At a Glance
✔ Pollinator-Friendly ✔ Deer-Resistant ✔ Drought-Tolerant
Plant It With
- Millenium Allium — the popular sister allium for a longer, fuller summer globe display.
- Summer Beauty Allium — another tidy clumping allium that extends the bloom window.
- Magnus Coneflower — purple-pink daisies that echo the allium globes.
- Autumn Fire Sedum — rosy late-season heads and a similar low-water, full-sun nature.
Is Windy City Allium Right for Your Yard?
Windy City is an easy, well-behaved pick for sunny, well-drained Minnesota borders — it forms a neat clump that won't flop or spread, takes drought in stride, and the onion scent keeps deer and rabbits away. It's not a fit for wet shade or heavy, soggy soil.