Bunching Onion Winter Ishikura
Bunching Onion Winter Ishikura a traditional Japanese type bunching onion. At maturity, the stalk has white stems up to 50cm long with 6-7 deep green, thick leaves. These bunching onions do not form bulbs and do not multiply by division. This improved strain is tolerant to warm and cool temperatures and is suitable for winter harvesting as well in Tasmania. Do not put fresh manure on bed before planting (preferably a few months earlier) and lime if your soil is acidic. Sow from July through to March in a cool climate.
Sow – August to April (cool climate). Sow 10 seeds per hole, can thin to 5.
Spacing – 5cm between bunches, 20cm rows.
Because the wild onion is extinct and ancient records of using onions span western and eastern Asia, the geographic origin of the onion is uncertain, although domestication likely took place in Southwest or Central Asia. Onions have been variously described as having originated in Iran, western Pakistan and Central Asia.
Germination: Optimal Soil temperature is 16 to 24 C (around 10-14 days to germination)