How to Grow Allium caeruleum Plants in your Garden
Gardener's HQ Guide to Growing Azure-flowered Garlic / Blue Globe Onion
Allium caeruleum photograph by Col Ford and Natasha de Vere.
Allium caeruleum Growing and Care Guide
- Scientific Name: Allium caeruleum
- Common Name: Azure-flowered garlic, Blue globe onion, Blue ornamental onion, Blue-of-the-heavens, Blue-flowered garlic
- Growing Zone: USA: 2 to 7
- Life Cycle / Plant Type: Herbaceous, Perennial
- Plant Height (Inches): 12 to 24
- Plant Spread (Inches): 12 to 18
- Time of Bloom: Late spring to Early summer
- Flower Details: Blue
- Leaf Foliage: Green
- Growth Form: Upright / erect
Ideal Growing Conditions
- Best Light Conditions: Full sunlight
- Rate of Growth: Average pace
- Suitable Soil Types: Loamy, Neutral, Sandy, Well drained
- Soil Moisture: Dry
- Level of Maintenance: Low
- Propagation: Seed or clumps, sowing in containers in a cold frame when just ripe or in the spring. Alternatively, remove offsets in autumn
- How to Prune: Not usually required
- Pests: Usually pest free, onion fly, thrips
- Diseases: Mainly trouble free, Onion white rot and downy mildew
- Can Attract:
- Tolerant of:
- Best Garden Use: Container, Rock garden, Specimen
- Family: Amaryllidaceae.
- Closely Related Species: Agapanthus, Amarylis, Narcissus, Galanthus, Zephyranthes.
- Miscellaneous: Non-native to North America, Suitable for cut flowers
- Genus Detail: Allium
- Further Reading and References: Here and Here
I hope that you enjoyed this guide on how to grow Allium caeruleum. You may also enjoy the following Gardener's HQ growing guides: How to grow Leeks and Zephyranthes plants.