Onion Red Rocks F1
Onion Red Rocks F1 is a market standard producing outstanding red onions and has become the major selling variety on the Australian market. It has a medium-sized bulb with excellent colour and uniformity. Also stores well for a red onion (up to 6 months if dried and stored well).
Water fortnightly with liquid fertiliser (like Powerfeed or Charlie Carp) to assist quick growth as this will enhance bulb size.
Sow – July to early September in a tray in a warm spot (cool climate). Plant out in September if sown July/Aug.
Spacing – 10cm plants, 30cm 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 22 to 24 C (around 10-14 days to germination)