ornamental onion
Allium caesium
RHS AGM 2002
USDA zones4 to 7
SunNeeds full sun (6+ hours)
WaterHandles moderate to moist soil
Size12 to 24 inches tall
- Bloom season
- Spring, summer
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
Ornamental onion (Allium caesium) is a bulb for borders and low maintenance gardens. It is hardy to USDA zone 4, or down to -30°F (-34°C). This plant likes full sun and average to moist soil of most types. It blooms in spring and again in summer, and the fragrant flowers attract butterflies and bees. Deer and rabbits rarely make it their first choice. It also tolerates drought.
Pairs well with May Night salvia, Perennial candytuft, and Black Parrot tulip.
Native range
Europe, Corse, Krym, Sardegna, and 2 more places. See all 6
Europe, Corse, Krym, Sardegna, Sicilia, and Türkiye.