Root vegetable
Can you grow Spring Onion on a balcony?
Allium fistulosum
Yes — great in containers
Spring Onion (Allium fistulosum) grows well on a balcony in a suitable container. It needs full sun — around 6+ hours of direct sun a day. Ready ~8-12 weeks from sowing; lift when about 15cm tall with a slim bulb, harvesting largest first. All figures below are sourced from RHS and the Old Farmer's Almanac.
Sun
☀️ Full sun (6+ h)
Water
Medium
Difficulty
Easy
Hardiness
Annual
Container fit
Excellent
Sow
Sow direct thinly, ~2cm apart, in short rows every 3-4 weeks from late winter under cover through spring for a steady supply
Harvest
Ready ~8-12 weeks from sowing; lift when about 15cm tall with a slim bulb, harvesting largest first
Good companions: Carrots, beets, cabbage, lettuce, strawberries
Balcony tip: Any pot, trough or windowbox over 20cm deep works; scatter-sow and water regularly as containers dry out fast.
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Häufige Fragen
What size pot does Spring Onion need?
Container size for Spring Onion isn't specified by our sources for a single value — as a rule, give roots room and don't let a small pot dry out. Check the linked RHS/Almanac page.
How much sun does Spring Onion need on a balcony?
Spring Onion wants full sun — about 6+ hours of direct sun daily. Match it to your balcony's aspect before buying seed.
When do you sow Spring Onion?
Sow direct thinly, ~2cm apart, in short rows every 3-4 weeks from late winter under cover through spring for a steady supply. Timing shifts with your climate/USDA zone — the linked sources give the detail.
Sources & date
- RHS: Spring Onion
- Old Farmer's Almanac: Spring Onion
- Data as of: 2026-07-10
- Container sizes and timings are guidance — adjust to your climate/USDA zone and balcony aspect.