We're offering you a Onion (Spring) Red Baron 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 (Spring) 'Red Baron' – Bold Colour & Flavour for Your Garden

Allium cepa 'Red Baron' is a celebrated spring-planted onion variety known for its deep red skin and crisp, red-rimmed flesh. This mid- to late-maturing cultivar stands out both in the garden and on the plate, bringing visual appeal and a punchy flavour to your homegrown produce.

• Bountiful Harvests: 'Red Baron' forms firm, flattish-round bulbs that are easy to lift and prepare. Each bulb matures with an attractive dark red colour—ideal for fresh salads, sandwiches, or cooked dishes.
• Culinary Versatility: Enjoy its stronger-than-average onion flavour in everything from salsas to roasts. The vibrant colour holds up well when sliced raw or cooked lightly.
• Aesthetic Appeal: This variety brings ornamental value to your veg patch or borders with its rich hues and neat growth habit.

Growing Guide

• Sowing & Planting: Plant onion sets outdoors from February to April in well-drained, fertile soil. Space bulbs 10cm apart in rows 25cm apart. Choose a sunny site for best results.
• Cultivation: Keep the soil moist but not waterlogged. Remove weeds regularly and avoid disturbing the bulbs once they start swelling. Onions prefer neutral to slightly alkaline soil (pH 6–7).
• Mature Size: Bulbs typically reach 6–8cm across at maturity.
• Harvesting: Lift onions from July onwards when leaves yellow and fall over. Cure in a dry, airy place before storing.
• Hardiness: Suitable for UK climates; plant after risk of hard frost has passed.

Planting & Care Tips

• Avoid planting onions where alliums grew last year to prevent disease build-up.
• No pruning required; simply remove flower stalks if they appear early.
• A balanced fertiliser at planting time supports healthy bulb development.

Companion Planting & Usage Ideas

• Great Companions: Grow alongside carrots, beetroot, or lettuce to maximise space and deter pests naturally.
• Kitchens & Borders: Use 'Red Baron' for colourful kitchen gardens or ornamental vegetable beds.

FAQs

• When is the best time to plant Onion 'Red Baron'?
  The best time is from February to April when the soil is workable and frost risk is low.
• How long does it take to mature?
  'Red Baron' matures in about 20–24 weeks after planting; harvest from July onwards.
• What soil does Onion 'Red Baron' prefer?
  This variety thrives in well-drained, fertile soils with a neutral to slightly alkaline pH (6–7).