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Now recognised as an essential part of the gardener’s vegetable patch, Suttons Seeds’ Onion Seeds and onion bulbs come with excellent health benefits such as lowering blood pressure, combating infections plus reducing fat and cholesterol levels.

You will also be glad to know that the onion and shallot seeds couldn’t be easier to grow - simply plant the onion/shallot sets (immature bulbs) in autumn, and they’ll be ready to lift and dry next July! All pack come complete with full growing instructions.

There are plenty of onion and shallot seed varieties on offer to excite your garden such as the sweet Italian, early-cropping Radar and even the spicy Red Gourmet types - Quality guaranteed!


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  1. Shallot Bulbs - Griselle Quick View

    Shallot Bulbs - Griselle

    Delivery within 3-5 days 500g Pack
  2. Shallot (Banana) Seeds - Simiane Quick View

    Shallot (Banana) Seeds - Simiane

    Delivery within 3-5 days Average Packet Content 150 seeds
  3. Onion Sets - F1 Centurion Quick View

    Onion Sets - F1 Centurion

    Despatch from 05/01/2021. 250g Pack
  4. Onion Sets - Red Baron Quick View

    Onion Sets - Red Baron

    Despatch from 05/01/2021. 250g Pack
  5. Shallot Bulbs - Autumn Twin Pack Save 16% Quick View

    Shallot Bulbs - Autumn Twin Pack

    Delivery within 3-5 days 500g Pack of each
  6. Onion Sets - Hysky Quick View

    Onion Sets - Hysky

    Despatch from 05/03/2021. 250g Pack
  7. Shallot Bulbs - Red Sun Quick View

    Shallot Bulbs - Red Sun

    Despatch from 08/01/2021. 400g Pack
  8. Onion Heat Treated Bulbs - Twin Pack Save 19% Quick View

    Onion Heat Treated Bulbs - Twin Pack

    Despatch from 05/03/2021. 2 x 250g Packs (1 of each variety)
  9. Bumper Spring Planting - Onions, Garlic, Shallots Save 37% Quick View

    Bumper Spring Planting - Onions, Garlic, Shallots

    Despatch from 11/01/2021. Onion Sets, Garlic Bulbs, Shallot Bulbs
  10. Shallots Bulbs - Meloine Quick View

    Shallots Bulbs - Meloine

    Despatch from 05/01/2021. 400g Pack


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Onion Sets - The Easy Way to Grow Onions

Onion Sets are immature "Bulbs" in a arrested stage of growth. When planted they begin to grow again, becoming full sized onions by late summer. Rarely attached by pests or Diseases they will thrive in quite Ordinary conditions. No seed sowing, no thinning, no fuss; just push them into the earth where you want them, and watch them grow! - Unpack sets on arrival, and spread in a light cool position until planting time. Plant February-April, leaving tips of bulbs above the soil surface, allowing about 10cm (4") between sets and about 30cm (12") between rows. 250g of onion sets (approx. 60 sets) will plant a row of about 6m (19'). Size of sets 14/21mm.

Why buy heat treated onion sets?

It's frustrating when your beautifully forming onions decide it's time to develop seed and send up a flower stalk. Heat treating is a process that we carry out on your behalf to prevent this happening.
Heat treatment starts in November depending on the size of the bulb. During the heat treatment, the onion sets are gradually heated up over 12 days from the 3-5°C storage temperature to 30-32°C and, depending on size, are kept at this temperature for 30-60 days (during which time they are heated up to 32-35°C for 10 days) and then gradually cooled to 10-14°C for planting in April/May. So whilst they are a little more expensive, you can be more confident of harvesting onions you can be proud of!

Autumn planting Onions, Garlic and Shallots will give you an earlier crop next year!

Onions are one of our most invaluable vegetables and also one of civilisation’s oldest medicines. They can help lower blood pressure and cholesterol levels, and are anti-asthmatic, antibacterial and antiseptic.