'Radar' Organic Onion Sets (Autumn/Winter Planting) 10-22mm
'Radar' autumn planting sets are an excellent overwintering/Japanese onion. 10-22mm sets. Can be planted from October to March. More details including bulbs per kg below.
Pre-order organic planting garlic, onion sets and flower bulbs from August 2026. Stock due from Mid-September 2026. If you need other goods sooner please order those separately.
Organic Radar Autumn Planting Onion Sets
The principal advantage of planting onion sets in the autumn is that your onions are ready to harvest around a month before spring-sown onion sets are. Also, because they are harvested around a month earlier, you can potentially immediately follow them with another crop that would be too late to plant a month later. Sweet corn and winter squash for example. For a good yield, onions need moist soil when they are bulking up in Spring.
Growing schedule: Onion sets of this overwintering Japanese variety for planting from September, can even be planted in January, February and March. Can be pulled throughout Winter and Spring as scallions, or left to grow into mature onions. Radar onions will be ready for harvesting in late May/June, at least 4-5 weeks before spring planted sets will be ready.
Planting Depth/Distance: Plant 3cm deep and 4-5cm apart in the row with 30-40cm apart between the rows.
Growing Conditions: Onions need a friable, free-draining soil and it needs to be a fertile, weed-free, compost-enriched spot in full sun (no fresh manure). Very Winter hardy.
How many sets are in a pack?
- 500g = 125 - 150 sets
- 1kg = 250 - 300 sets
- 10kg = 2,500- 3,000 sets
- 25kg bag = 6,000 - 7,000 sets
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