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

Onion 'Sturon' Variety

Grow a classic in your garden with Organic Onion 'Sturon' – a traditional spring onion variety celebrated for its reliability and exceptional storage qualities. Recognised with the RHS Award of Garden Merit, 'Sturon' delivers consistent harvests and brings both beauty and bounty to your vegetable patch.

• Botanical Name: Allium cepa 'Sturon'
• Mature Height & Spread: Reaches up to 45cm (18") tall with a compact spread of just 15cm (6")
• Bolt Resistance: Renowned for resisting premature flowering, ensuring full bulb development
• Aesthetic Appeal: Upright green foliage adds structure and freshness to borders or containers

Why Choose Onion 'Sturon'?

• Consistent Yields: Dependable crops year after year, even in unpredictable weather.
• Long Storage Life: Semi-round bulbs keep well after harvesting, letting you enjoy homegrown onions for months.
• Award-Winning Quality: RHS Award of Garden Merit means this variety is tried, tested, and trusted by gardeners.

Growing Guide

• Sowing Time: Plant sets outdoors from February to April for best results.
• Sunlight: Prefers a sunny, open site with good air circulation.
• Soil Requirements: Thrives in fertile, well-drained soil (neutral to slightly alkaline pH).
• Cultivation: Space sets about 10-15cm apart in rows; keep weed-free and water during dry spells.
• Harvesting: Lift bulbs from July onwards once foliage yellows and topples over naturally.

Caring For Your Crop

• Avoid planting onions where alliums have grown in the past two years to prevent disease build-up.
• Add organic matter before planting for strong growth.
• No pruning required; simply remove any flower stalks that appear to encourage bulb formation.

Perfect For...

• Kitchens gardens and allotments
• Pots and raised beds where space is at a premium
• Mediterranean-style companion planting schemes (try with carrots or lettuce)

FAQs

• When is the best time to plant Onion 'Sturon'?
  You should plant sets outdoors from February to April for a summer harvest.
• How much space do I need between plants?
  Leave about 10-15cm between each set for optimal bulb development.
• What type of soil is best?
  'Sturon' prefers fertile, well-drained soil with a neutral to slightly alkaline pH. Avoid heavy clay or waterlogged ground.