AllotMe
GROWING GUIDES
Spring Onions
Vegetables
Easy
Planting Schedule
Month by month
Sow Indoors
Sow Outdoors
Plant Out
Harvest
Sow Seeds Indoors
Can be sown in modules indoors from February for an early crop.
Outdoors
Sow direct outdoors from March to September for a nearly year-round harvest. Successional sowing every 3-4 weeks works best.
Harvest
Pull when they reach pencil thickness, usually 8-12 weeks after sowing. Use before the bulb starts to swell significantly.
Month by month
Sow Indoors
Sow Outdoors
Plant Out
Harvest
How to Sow
- Sow seeds thinly, 1cm deep in rows 10cm apart
- No need to thin — spring onions grow well close together
- Choose any reasonably fertile, well-drained spot
- Sow every 3-4 weeks from March to September for continuous supply
- Can also be grown thickly in pots and containers
Plant Care
- Keep soil moist but not waterlogged
- Weed regularly as spring onions don't compete well with weeds
- No feeding necessary if soil has been previously well composted
- Cover autumn sowings with cloches or fleece for winter harvesting
- Watch for onion fly — cover with fine mesh as a preventative
AllotMe’s Tips
- Spring onions are one of the easiest and quickest crops — perfect for filling gaps between slower-growing veg
- 'White Lisbon' is the classic reliable variety; 'Ishikura' gives longer, straight stems without bulbing
- Sow a batch under cover in September/October for fresh spring onions through winter
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