We're offering you a Organic Onion (Spring) Stuttgarter Giant for £3.99, saving you up to 60% off Thompson and Morgan's's price of £9.99 (correct as of 03.02.2026).

Onion 'Stuttgarter Giant': A Champion for Your Garden

Grow Crunchy, Flavourful Onions with 'Stuttgarter Giant'

Bring homegrown taste to your kitchen with the Organic Spring Onion 'Stuttgarter Giant'. This time-tested Allium cepa variety is prized by gardeners for its robust growth and semi-flat bulbs that deliver reliable crunch and rich, earthy flavour. Perfect for both new and seasoned growers, 'Stuttgarter Giant' sets the standard for spring-planted onions.

• Botanical Name: Allium cepa 'Stuttgarter Giant'
• Plant Type: Hardy annual vegetable
• Mature Size: Up to 45cm (18") tall, 15cm (6") wide
• Planting Time: Early spring, as soon as the soil is workable
• Harvest Period: Late summer to early autumn

Why Choose 'Stuttgarter Giant'?

• Bountiful Yields: Enjoy consistent crops of medium-large bulbs, ideal for salads, cooking, or storage.
• Aesthetic Appeal: Adds neat structure and subtle colour to vegetable beds or borders.
• Disease Resistance: Known for resilience and strong performance compared to other varieties like 'Red Baron'.

Growing Guide & Care Tips

• Sunlight: Prefers full sun for best bulb development.
• Soil: Well-drained, fertile soil with a neutral pH (6.0–7.0) is ideal.
• Sowing: Plant sets 10cm apart in rows spaced 30cm apart; water well after planting.
• Irrigation: Keep soil moist but not waterlogged during active growth.
• Fertilising: Apply a balanced fertiliser at planting and again mid-season if needed.
• Pests/Diseases: Watch for onion fly and practice crop rotation to prevent disease build-up.
• Harvesting: Lift bulbs when foliage yellows and falls over; cure in a dry, airy place before storage.

Garden Design Ideas

• Companion Planting: Grows well alongside carrots, beets, and lettuce.
• Pots & Raised Beds: Compact habit makes it perfect for container gardening or small spaces.
• Culinary Use: Enjoy fresh or store for winter use—ideal for soups, stews, and salads!

FAQs

• When is the best time to plant 'Stuttgarter Giant' onions?
  The best time is early spring as soon as the soil can be worked—typically February to April in the UK.
• How long until harvest?
  You can expect mature bulbs ready for harvest about 16–20 weeks after planting, usually late summer to early autumn.
• What soil conditions do these onions prefer?
  'Stuttgarter Giant' thrives in well-drained, fertile soil with a neutral pH between 6.0 and 7.0. Avoid heavy clay soils or waterlogged sites for best results.