Spring onion
Allium cepa · Scallion in the US
In a typical UK garden, sow indoors early February to late March, sow outside early March to mid-July, plant out late March to mid-April, and harvest early March to mid-November.
When to sow, plant and harvest
Last frost around 20 April, first frost around 31 October.
- Sow indoors
- early February to late March
- Sow outdoors
- early March to mid-Julylate August to mid-September
- Plant out
- late March to mid-April
- Harvest
- early March to mid-November
Growing facts
- Spacing
- 2.5 cm apart, rows 20 cm apart
- Square foot
- 16 per square (30 cm squares)
- Sowing depth
- 1 cm
- Ready in
- 50 to 70 days from sowing
- Grows to
- 30 cm
- Hardiness
- Hardy to about -10 °C
- Sun
- Full sun
- Crops for
- About 4 weeks
Growing tip
Sow a short row every three weeks for a steady supply, and pull them while still slim.
Neighbours
Alliums are one crop rotation group. Try not to grow them where any of the family grew in the last two or three years. How crop rotation works
More alliums
Where these figures come from
Every crop in VegLog was checked against published growing advice. Dates are worked out from average frost dates, so they shift with your garden. For spring onion, we used:
Grow spring onion with VegLog
Add spring onion to a bed and VegLog reminds you when to sow, plant out and pick, timed to your own town's frost dates.
