There are but a few true blues to be found among the Ornamental Onions, and they are prized for the cooling effect they have on the exuberance of late spring. A. caeruleum is a deep, clear blue, and its tiny flowers are arranged in clusters 1″ across.
- Type: Perennial
- Zone: 4 to 8
- Height: 1.00 to 2.00 feet
- Spread: 0.50 to 1.00 feet
- Bloom Time: May to June
- Bloom Description: Sky blue
- Sun: Full sun
- Water: Dry to medium
- Maintenance: Low
- Suggested Use: Naturalize
- Flower: Showy
- Leaf: Fragrant
- Attracts: Butterflies
- Tolerate: Deer, Black Walnut