PlantSowGrow
How to grow Spring Onion (White Lisbon)
Allium cepa
🥕 Vegetable
🌱 Grown each year
Fast, mild salad onions — sow little and often from spring to late summer. Easy in pots and window boxes.
At a glance: Sow mid March to mid August, harvest from mid May.
When to sow, plant and harvest
JanFebMarAprMayJunJulAugSepOctNovDec
Sow outdoors
Harvest
Timed for a typical UK garden (last frost mid-April). The app uses your own town's frost dates.
Growing Spring Onion (White Lisbon): what it needs
- Light
- Full sun · 6+ hours a day
- Watering
- Water regularly in dry weather
- Soil
- Fertile, well-drained soil
- Spacing
- 1 cm
- In pots
- Grows well in containers
- Feeding
- A general feed before sowing or planting
- Harvest
- About 60 days from sowing
- Hardiness
- USDA zones 3–9
- Difficulty
- Easy
Step by step
- Mid March – mid August · 4 weeks before the last spring frost
Sow Seeds Outdoors
Sow thinly in drills where they are to grow.
- 10–14 days after “Sow Seeds Outdoors” · Late March – early April
Check Germination
Seedlings should appear in 10–14 days. If sown outdoors, thin to 1 cm apart when big enough to handle.
- 46–67 days after “Check Germination” · Mid May – early June
Start Harvesting
Pull when pencil-thick.
- 14–28 days after “Start Harvesting” · Late May – early June
Sow Another Batch (optional)
Sow a pinch every 3 weeks for a continuous supply.
- 30–60 days after “Sow Another Batch” · Late June – late July
Finish and Clear
Clear the remains to the compost heap once cropping ends.
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