Plant · P-364
Prairie Onion
Allium stellatum
Prairie onion, also called autumn onion, blooms from late summer into autumn, well after most other flowering plants nearby have finished - a valuable late-season nectar source for butterflies. Its bulb, leaves and flowers are all edible raw or cooked, though the bulbs stay small, so the leaves and flowers are the real harvest and the bulb is a bonus. It grows naturally on rocky, limestone-derived prairie ground and tolerates dry, alkaline soil without any coaxing.
Record at a glance
Growing profile
- Sun
- Full Sun · Partial Sun
- USDA zone
- USDA 3–8
- Soil
- Sand · Loam
- Moisture
- Dry · Well-Drained
Vertical layer
Rhizosphere- Soil pH
- 6.6–7.5
- Plant type
- Perennial
- Mature height
- 12–18 in
- Mature spread
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The deeper layer