onion
Allium cepa
Amaryllidaceae · bulb · introduced
Last updated
Data Coverage 3 of 6 dimensions
Quick Facts
Height
1-2 ft (foliage); 3-4 ft (flower scape)
Spread
0.5-1 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Well Drained
Water
Moderate
Hardiness
Zone Zones 3–10
Bloom Time
June-July (second year if bolting)
Origin
Central Asia (likely Iran/Afghanistan region)
Diseases (3)
Pests (2)
Cultivars (2)
''Walla Walla''
Long-day sweet onion. Very mild flavor; large bulbs. Poor storage life (1-2 months). The iconic PNW onion.
Transplant in early spring for summer harvest
''Copra''
Long-day storage onion. Firm, pungent, excellent keeper (6+ months).