Onion Seeds 'Centro'
Onion Seeds 'Centro' Onion Seeds 'Centro' Onion Seeds 'Centro' Onion Seeds 'Centro'
Onion Seeds 'Centro' Onion Seeds 'Centro' Onion Seeds 'Centro' Onion Seeds 'Centro' Onion Seeds 'Centro'

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Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'
Onion Seeds 'Centro'

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Onion Seeds 'Centro'

Allium cepa

Sow Onion Centro seeds for high yields of top-quality firm round onions with golden brown skins and good flavour. Stores well over a long period.

Marshalls Garden

500 Seeds

10204153

In stock

£3.29

Fast Delivery – Next Day Despatch Seed Only Delivery From £2.99* | Learn More

Fast Delivery – Next Day Despatch Seed Only Delivery From £2.99*

Seed Only orders £2.99 delivery when buying 3 or more.

Less than 3 seed packet only orders will require £6.99 delivery charge. Buy 3 or more Seed Packets and receive discounted delivery at £2.99.

When showing as 'In Stock' on the website product page, products are dispatched next day by our expert team  of placing your order, (Sunday to Friday).

To ensure your seeds arrive in the freshest condition and undamaged, they are carefully packed in specially designed, fully recyclable packaging.

For larger seed orders we use Yodel express delivery to ensure you receive your package within 3 days of placing your order with the addition of it being fully tracked for your peace of mind.

 

Key Features

Marshalls Garden

High Yield

Marshalls Garden

Hardy

Marshalls Garden

Low Maintenance

Marshalls Garden

Disease Resistant

Product Information

Eventual Height:

40cm

Position:

Full Sun

Suitable for:

Pots, Window Sill, Patio, Small Gardens, Borders, Vegetable Plot, Window Boxes, Raised Bed

Plant Type:

Annual

Soil Type:

Loose, free-draining, rich in organic matter, pH 6.0-7.0

Complete The Job

Growing Calendar

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sow Indoors

Sow Indoors

Sow Outdoors

Sow Outdoors

Harvest

Harvest
  • High yields of top-quality onions
  • Golden brown skins
  • Good flavour
  • Stores well for a long period

Onion ‘Centro’ produces a high yield of top-quality firm round onions with golden brown skins and good flavour. It stores very well over a long period.

Sow indoors

January-March: Sow thinly 1cm (1?2in) deep in clean trays or modules of firm pre-watered compost. Place in warmth 50-60°F (10-15°C) and keep moist at all times. When large enough to handle transplant 5cm (2in) apart to trays of potting compost.p>

Sow outdoors

March-April: Sow thinly into pre-watered soil 1cm (1?2in) deep, in short rows 20cm (8in) apart, directly into harvest position. Keep soil moist at all times until seedlings are established.

Plant out

April-May: Harden off before planting out into the required harvest position 15cm (6in) apart in rows 30cm (12in) apart.

Tips

Weed regularly. Harvest once the leaves turn yellow and flop over. Leave onions to dry before storing.

How To Grow

Onions are a staple crop for any home gardener and one of the most rewarding vegetables to grow from seed. Whether in large garden beds or patio containers, they thrive with just a little care. From sweet and red onions to spring onions and shallots, each type adds its own unique flavour to the kitchen. Start seeds indoors early for a strong head start and choose a sunny, well-drained spot for planting. Keep soil moist but not waterlogged for the best growth.


Indoor Sowing
Fill a half seed tray with fine-textured seed compost and lightly scatter seeds across the surface without overcrowding. Cover lightly and keep moist. A heated propagator or heat mat provides consistent warmth, encouraging quick germination and strong root growth.


Planting Out
Transplant seedlings 1cm deep, spacing 10cm between plants and 30cm between rows. Rotate crops each season to avoid soil-borne pests and diseases, and avoid planting onions or related crops (leeks, garlic, shallots) in the same spot more than once every 3–4 years.


Interplanting
Onions store well, so one sowing is usually enough. Use the spaces between rows to grow carrots, cabbages, or lettuce. Their strong scent naturally deters pests like carrot flies and aphids. Companion herbs such as mint and parsley also help keep onion flies away.


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