Thompson & Morgan

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Onion & Leek Seeds


Growing onions from seed is easier than you think and can be cheaper than buying onion sets. You'll find all different types of onion in our range - spring, white, red, brown and shallots. Our range of leeks offers outstanding garden and exhibition varieties.

We have found 13 products.
 
Onion : Ailsa Craig : Giant/Show Vegetable

Onion 'Ailsa Craig' (Giant/Show Vegetable)

Allium cepa

 This enduringly popular and well known variety makes a splendid choice for the show bench and is equally good in the kitchen. The quality, large, globe shaped bulbs have a rich, golden, straw coloured skin and an excellent mild flavour. For the largest bulbs, Onion ‘Ailsa Craig’ can also be sown in modules in autumn for transplanting outdoors in spring. Height: 45cm (18"). Spread: 10cm (4"). More info
    • 1 packet (350 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.99
Onion : Marco F1 Hybrid

Onion 'Marco' F1 Hybrid

Allium cepa
This maincrop onion produces round, thin necked, straw coloured bulbs with good disease tolerance. Onion ‘Marco’ is superb for storing, remaining in good condition right through to March. This RHS AGM variety reliably produces heavy yields with bulbs achieving a good size in most soils. Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (250 seeds)

    • Despatch: Within 2 Days
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    • £2.19
Onion : Bunton's Showstopper

Onion 'Bunton's Showstopper'

Allium cepa

 A well named variety that makes a big impression on the show bench! This award-winning exhibitor onion, weighing up to 2.27kg (5lb), was bred by T&M customer Ken Bunton for good shape, a larger base and fabulous skin quality. The giant bulbs of Onion ‘Bunton’s Showstopper’ also store well and have an excellent mild flavour for the kitchen. Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (75 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.49
Onion : Red Baron

Onion 'Red Baron'

Allium cepa
A mid-late maturing variety, Onion ‘Red Baron’ produces firm, flattish-round bulbs of a beautiful dark red colour. With eye-catching red rimmed flesh and a stronger flavour than most varieties, this RHS AGM variety makes an attractive addition to salads. An excellent cropping red onion with good storage potential. Height: 45cm (18”). Spread: 15cm (6”). More info
    • 1 packet (175 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.49
Onion : Hi Keeper F1 Hybrid

Onion 'Hi Keeper' F1 Hybrid

Allium cepa

 With excellent winter hardiness, this is by far the best variety for overwintering from an autumn sowing outdoors. Onion ‘Hi Keeper’ produces quality globe shaped bulbs weighing 120g (4oz), with golden yellow skins that will store well. This versatile variety is equally good from a spring sowing and makes a fine choice for the kitchen or the show bench. Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (80 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.99
Onion : Bedfordshire Champion

Onion 'Bedfordshire Champion'

Allium cepa

 Onion ‘Bedfordshire Champion’ has retained its popularity for over a hundred years. This heavy cropping variety produces large globe shaped, golden brown skinned bulbs with crisp white flesh and a mild flavour. This reliable onion is well suited to the UK climate with late summer maturity and excellent storing capabilities. Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (250 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.99
Onion : Rosanna

Onion 'Rosanna'

Allium cepa

  Customer Rating

A distinctive and appealing reddish brown skinned, semi-globe shaped bulb with stunning pink rings when sliced. Onion ‘Rosanna’ is ideal for all culinary uses with a real old fashioned flavour, similar to those purchased from the French onion seller of yesteryear. Height: 45cm (18"). Spread: 15cm (6").

 More info
    • 1 packet (350 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.99
Onion : Supasweet™ (Dulcinea) F1 Hybrid

Onion 'Supasweet'™ (Dulcinea) F1 Hybrid

Allium cepa

The first commercial variety of sweet and mild bulb onions available to UK gardeners! The large semi-globe, copper-skinned bulbs of Onion Supasweet™ are so sweet and juicy they can be eaten raw without being overpowering - ideal for adding to summer salads. Bulbs are best used as required, as they are not renowned for their storage capabilities.

Please note: Onion flavour (its sweetness and mildness) is significantly affected by weather conditions, soil type and its sulphur content. Light, sandy soils produce the highest levels of sweetness, whereas clay and dark humus rich soils can result in bulbs with a stronger flavour. Height: 45cm (18"). Spread: 10cm (4").

 More info
    • 1 packet (200 seeds)

    • Despatch: Within 2 Days
    •  
    • £2.29
Onion Cipolla Rossa di Toscana - Vita Sementi Italian Seeds

Onion 'Rossa di Toscana' - Vita Sementi® Italian Seeds

Allium cepa

 A red onion with a powerful flavour. Onion ‘Rossa di Toscana’ produces glossy, red skinned bulbs with attractive dark red tinged flesh. This colourful Italian onion is ideal for storing for autumn and winter use. Height: 45cm (18"). Spread: 10cm (4"). More info
    • 1 packet (840 seeds)

    • Despatch: Within 2 Days
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    • £2.69
Onion : Sturon

Onion 'Sturon' - Duchy Originals Organic Seeds

Allium cepa
An RHS Award of Garden Merit variety producing well sized semi-round bulbs with good keeping qualities. Onion ‘Sturon’ is a traditional variety that has become a favourite for its reliability. Height: 45cm (18”). Spread: 15cm (6”). Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (300 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.99
Onion Cipolla Ramata di Milano - Vita Sementi Italian Seeds

Onion 'Ramata di Milano' - Vita Sementi® Italian Seeds

Allium cepa

 This versatile Italian onion is ideal for all culinary uses. Onion ‘Ramata di Milano’ produces beautifully rounded, golden-brown skinned bulbs with crisp white flesh. This general purpose variety stores well throughout autumn and winter for use later on. Height: 45cm (18"). Spread: 10cm (4"). More info
    • 1 packet (1400 seeds)

    • Despatch: Within 2 Days
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    • £1.99
Onion : Bulbing Cipolla Tonda Musona

Onion 'Tonda Musona' - Vita Sementi® Italian Seeds

Allium cepa

 Onion 'Tonda Musona' produces stunning, large, rounded, white-skinned bulbs with crisp white flesh. This versatile variety is ideal for all purposes including slicing raw into salads. Well suited to storing, this onion will keep well into autumn and winter. Height: 45cm (18”). Spread: 10cm (4”). More info
    • 1 packet (840 seeds)

    • Despatch: Within 2 Days
    •  
    • £1.99