Welsh onion
Allium fistulosum
Bunching allium grown for its hollow green leaves and stalks, used fresh or cooked.
Family
Amaryllidaceae
Temperature
12-25°C (absolute 6-30°C)
Rainfall
850-1600mm (absolute 700-2500mm)
Altitude
2000m
Soil pH
6.6-7.4 (absolute 5.5-8.5)
Soil types
Fertile, well-drained loam