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 12 products.
 

Leek 'Oarsman' F1 Hybrid

Allium porrum

This superb midseason variety produces long, pure white, uniform stems with dark, erect foliage. Leek 'Oarsman' shows good early vigour, bulking up quickly, with no sign of bulbing. It stands well over a long period with good tolerance to rust and bolting. A terrific garden variety with an RHS AGM. Height: 45cm (18"). Spread: 30cm (12").
More info
    • 1 packet (40 leek seeds)

    • Despatch: by Monday
    •  
    • £2.99

Leek 'Pennine' F1 Hybrid

Allium porrum

From British breeding comes the first - and only - hybrid pot leek. The result of painstaking work in crossing sterile male lines with top prize-winning show leeks. Leek 'Pennine' is a much thicker, but shorter blanch with a true pot leek appearance. This autumn variety is ideally grown in individual 25cm (10") pots or in well-prepared soil in the garden, where it will withstand adverse conditions right up until New Year. Height: 45cm (18"). Spread: 30cm (12"). More info
    • 1 packet (40 leek seeds)

    • Despatch: by Monday
    •  
    • £3.19 £0.99

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").


Companion planting: Try growing onions with mint to confuse and deter onion fly.


Useful links:

Companion PlantingHow to grow Onions


More info
    • 1 packet (250 onion seeds)

    • Despatch: by Monday
    •  
    • £2.69 £0.99

Leek 'Blauwgroene Winter - Bandit'

Allium porrum, Leek 'Bandit'

An outstanding cultivar for harvesting from winter through to spring. The dark leaves of Leek 'Blauwgroene Winter - Bandit' contrast beautifully with delicious, thick, pure white stems. This variety has excellent garden performance and winter hardiness, showing good tolerance against rust and bolting. Height: 45cm (18"). Spread: 20cm (8").
More info
    • 1 packet (75 leek seeds)

    • Despatch: by Monday
    •  
    • £2.99

Shallot 'Camelot' F1 Hybrid

Allium cepa (Aggregatum Group)

Visually stunning, Shallot 'Camelot' is the darkest red-skinned variety available from seed. Each seed produces an individual, small, white fleshed bulb that will store extremely well for use throughout late autumn and winter. Shallots have become increasingly popular for their distinctive flavour, offering an interesting alternative to onions. Height: 35cm (14"). Spread: 15cm (6").

Useful links:

Companion PlantingHow to grow Onions

More info
    • 1 packet (60 shallot seeds)

    • Despatch: By end of October 2016
    •  
    • £3.19 £0.99

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").


Companion planting: Try growing onions with mint to confuse and deter onion fly.


Useful links:

Companion PlantingHow to grow Onions


More info
    • 1 packet (80 onion seeds)

    • Despatch: by Monday
    •  
    • £2.99

Spring Onion 'Feast' F1 Hybrid - RHS endorsed vegetable seeds

Allium cepa, Bunching Onion, Scallion

Onion Feast has long pure white slender stems contrast with the dark green, erect leaves of this outstanding spring onion. Excellent heat and downy mildew tolerance. Onion Feast stands very well, keeping in good condition. Ideal for successional sowing.

These vegetable seeds are endorsed by the RHS.
More info
    • 1 packet (500 spring onion seeds)

    • Despatch: by Monday
    •  
    • £2.99

Leek 'Below-Zero' F1 Hybrid

Allium porrum

This British bred leek combines the vigour of an F1 Hybrid with extreme cold tolerance to produce superb quality leeks that can withstand the harshest of weathers. Leek 'Below-Zero' produces pure white stems with dark leaves that stand well over a long period without bolting. This rust resistant variety can be lifted from Christmas right through to May. Height: 45cm (18"). Spread: 30cm (12"). More info
    • 1 packet (50 leek seeds)

    • Despatch: by Monday
    •  
    • £3.29

Onion 'Supasweet'™ (Dulcinea) F1 Hybrid

Allium cepa

 Customer Rating

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").


Companion planting: Try growing onions with mint to confuse and deter onion fly.


Useful links:

Companion PlantingHow to grow Onions


More info
    • 1 packet (150 onion seeds)

    • Despatch: by Monday
    •  
    • £2.99

Onion 'Santero' F1 Hybrid

Allium cepa

Spring planting. Heat treated.

The answer to gardeners' prayers! Heat treated early main crop, Onion 'Santero' F1 Hybrid is the first onion set with resistance to downy mildew, a potentially disastrous fungal foliage disease.


This 'Rijnsburger' type onion produces copper brown, oval-to-round bulbs with medium skin thickness. Yields are similar in quality and quantity to other F1 maincrop varieties currently available, and bulbs have great storage potential. Height: 45cm (18"). Spread: 15cm (6").

More info
    • 1 packet (75 seeds)

    • Despatch: by Monday
    •  
    • £2.99

Leek 'Cairngorm' F1 Hybrid

Allium porrum

The first F1 leek from seed, produced by British breeding from specially selected top prize-winning show leeks! This stocky variety has superb vigour and uniformity making it ideal for growing individually as a pot leek. Early autumn maturity makes Leek 'Cairngorm' ideal for the show bench as well as outside in the vegetable plot, where stems will stand until after Christmas. Height: 45cm (18"). Spread: 30cm (12"). More info
    • 1 packet (40 leek seeds)

    • Despatch: by Monday
    •  
    • £0.99

Shallot 'Prisma' F1 Hybrid

Allium cepa

From seed! Each seed of Shallot Prisma produces a single attractive shiny reddish-brown skinned, white fleshed round shallot bulb, with a distinct flavour. No risk of transferring virus of white rot as with sets and the bulbs of Shallot Prisma store well. More info
    • 1 packet (75 onion seeds)

    • Despatch: by Monday
    •  
    • £0.99