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Highlights

Consistent High Yields – Renowned for its reliable and abundant harvests every season.
Excellent Storage Qualities – Semi-round bulbs keep well, reducing waste and extending use.
Compact Growth – Grows to 45cm tall with a 15cm spread, ideal for small gardens or raised beds.
RHS Award of Garden Merit – Recognised for outstanding performance in UK gardens.
Easy to Grow – Thrives in well-drained soil and full sun; suitable for beginners and experts alike.

We're offering you a Onion (Spring) Sturon for £4.49, saving you up to 44% off Thompson and Morgan's's price of £7.99 (correct as of 03.02.2026).

Onion 'Sturon' Variety

Grow award-winning onions with Onion (Spring) 'Sturon'! This time-honoured Allium cepa variety is a favourite among UK gardeners for its consistent yields and exceptional keeping qualities. Recognised with the RHS Award of Garden Merit, 'Sturon' delivers semi-round, golden bulbs that store well—so you can enjoy your home-grown onions long after harvest.

Why Choose Onion 'Sturon'?

Reliable Crop: 'Sturon' is celebrated for its robust growth and uniform bulbs, making it a staple in both kitchen gardens and allotments.
Space-Saving: With a mature height of 45cm (18") and a spread of just 15cm (6"), this onion fits perfectly into borders or compact vegetable beds.
Long Storage: Harvested bulbs keep their quality in storage, letting you enjoy your onions well into winter.
Aesthetic Appeal: Upright green foliage adds structure and freshness to spring beds.

Growing Guide

Sowing Time: Plant sets between February and April for best results.
Sunlight: Prefers full sun; ensure at least 6 hours of direct light daily.
Soil Requirements: Grows best in fertile, well-drained soil with neutral pH (6.5–7.5).
Caring For Your Crop: Keep soil moist but not waterlogged. Remove flower heads to direct energy into bulb formation.
Harvesting: Lift bulbs from July when foliage begins to yellow and topple. Dry thoroughly before storing.

Design & Companion Planting Tips

'Sturon' pairs well with carrots, beets, and lettuce—companion planting helps deter pests naturally.
Add to mixed vegetable plots or edge sunny borders for an edible display.

FAQs

When is the best time to plant Onion 'Sturon'?
The ideal planting window is February to April when the soil is workable and frost risk is low.
How long does it take to mature?
'Sturon' typically matures in about 20–24 weeks after planting. Harvest from July onwards as foliage yellows.
What type of soil does it prefer?
This variety thrives in fertile, well-drained soil with a neutral pH between 6.5 and 7.5. Avoid heavy clay or waterlogged sites.