We're offering you a Onion (Spring) Setton for £3.99, saving you up to 56% off Thompson and Morgan's's price of £8.99 (correct as of 03.02.2026).

Discover Onion 'Setton' – The Gardener's Choice for Spring Planting

Onion 'Setton' is an outstanding spring onion set variety, bred from the popular 'Sturon'. It stands out with its uniform, round bulbs and reliable performance in UK gardens. This variety is a favourite among gardeners for its robust yields and extended storage life, making it a practical addition to any vegetable patch.

Why Choose Onion 'Setton'?

• Consistent Crops: Uniform shape ensures easy slicing and attractive presentation.
• Bountiful Harvests: Outperforms many standard varieties with higher yields.
• Award-Winning: Holder of the RHS Award of Garden Merit, recognised for quality and reliability.
• Long-Lasting Storage: Enjoy your harvest well into the off-season thanks to its excellent keeping qualities.
• Pleasant Flavour: Superior skin quality delivers both texture and taste that enhance any dish.

How to Grow & Care for Onion 'Setton'

• Planting Time: Sow onion sets outdoors between February and April when soil is workable.
• Site & Soil: Choose a sunny spot with fertile, well-drained soil. Onions prefer a neutral to slightly alkaline pH (6.5–7.5).
• Cultivation: Space sets 10cm apart in rows 25cm apart. Keep weed-free and water regularly during dry spells.
• Pest & Disease Resistance: Good resistance to bolting; monitor for onion fly or mildew as needed.
• Harvesting: Lift bulbs when foliage yellows and bends over (usually July–August). Dry thoroughly before storing in a cool, dry place.

Perfect For...

• Kitchens gardens: Reliable choice for home growers wanting a steady supply of onions.
• Culinary use: Excellent in salads, stir-fries, roasts, or as a base for soups and stews.
• Companion planting: Grows well alongside carrots, beets, and lettuce—helps deter some pests naturally.

FAQs

• When is the best time to plant Onion 'Setton' sets?
  The ideal time is from February to April, once the soil is workable but before heavy spring growth begins.
• How long does it take to harvest?
  You can expect mature onions about 18–20 weeks after planting; typically ready in July or August.
• What care do they require?
  Keeps soil moist but not waterlogged, weed regularly, and avoid overhead watering to reduce disease risk.