← Plants

Allegheny Onion

Allium cernuum

Amaryllidaceae · perennial · native

Last updated

Data Coverage 1 of 6 dimensions
Site Data
Threats
Cultivars
Phenology
GDD Thresholds
Puget Sound

Nodding onion is a native perennial bulb found across much of North America, recognized by its distinctive nodding flower clusters of pink, lavender, or white bell-shaped blooms from June to August. The slender, grass-like foliage is aromatic when crushed. It reaches eight to eighteen inches tall and naturalizes readily in well-drained soils.

Grow in partial to full sun in well-drained soil. Tolerates a range of conditions from rocky slopes to meadow edges. Drought-tolerant once established. Useful in rock gardens, native plant borders, and pollinator plantings. The nodding flower heads distinguish it from other ornamental alliums.

Quick Facts

Height
0-2 ft
Spread
0-1 ft
Growth Rate
Medium
Light
Sun to Part Shade
Soil
Moist, Well Drained
Water
Low to moderate
Hardiness
Zone Zones 4a–8b
Bloom Time
summer
Origin
North America