Delivery from £1.99
Over 25,000 5 Star Trustpilot Reviews
Royal Warrant Holders
Delivery from £1.99
Over 25,000 5 Star Trustpilot Reviews
Royal Warrant Holders

Onion Seeds

It’s enough to make you cry and that's what a good fresh Onion straight out the ground should do. The flavour of a seed grown Onion is just wonderful. The onion is a fundamental vegetable crop for all types of cuisine, and don’t forget the spring onion seeds and Shallot.

It’s enough to make you cry and that's what a good fresh Onion straight out the ground should do. The flavour of a seed grown Onion is just wonderful. The onion is a fundamental vegetable crop for all types of cuisine, and don’t forget the spring onion seeds and Shallot.

Refine by

Refine Products
  • View
  • Price
    Show Less Load More
  • Climate
  • Where to Grow
  • Colour
  • Type of Flowering Plant
  • Sow In
  • Plant In
  • Harvest In
  • Height
  • Spread
  • Spacing
  • Soil Type
  • Hardiness
  • Other
22 items
  • You're on page 1
Onion Seeds - Bedfordshire Champion

Average Packet Content 250 seeds

£1.75
Onion Seeds - F1 Kamal

Average Packet Content 220 seeds

£2.79
Shallot (Banana) Seeds - Simiane

Average Packet Content 150 seeds

£2.49
Onion Seeds - Ailsa Craig

Average Packet Content 250 seeds

£1.55
Onion (Salad) Seeds - Red & White Mix

Average Packet Content 300 seeds

£2.49
Shallot Banana Seed - Zebrune

Average Packet Content 150 Seeds

£2.49
Onion (Salad) Seeds - Apache

Average Packet Content 450 seeds

£1.55
Onion Seeds - Purplette

Average Packet Content 150 seeds

£1.99
Onion Seeds - Paris Silverskin

Average Packet Content 550 seeds

£1.75
Onion Seeds - F1 Santero

Average Packet Content 150 Seeds

£3.99
Onion Seeds - Globo

Average Packet Content 220 seeds

£2.79
Onion Seeds - Exhibition

Average Packet Content 150 seeds

£3.49
Onion Seeds - Borettana

Average Packet Content 250 seeds

£1.99
Onion Seeds - Walla Walla

Average Packet Content 150 seeds

£2.99
Onion Seeds - Isobel Rose

Average Packet Content 250 seeds

£2.99
Onion (Organic) Seeds - Ailsa Craig

Average Packet Content 250 seeds

£2.49
Onion Seeds - Senshyu Semi-Globe Yellow

Average Packet Content 350 seeds

£2.79
22 items
  • You're on page 1

Growing Onions from Seeds 

Onions are not so tricky to grow and raising them from seed, maybe the most difficult decision is which type of Onion to grow? Suttons have a comprehensive collection of onion seed varieties allowing for pretty much all year round growing in their different forms. Try Ishikura’ a bunching bountiful spring onion, for a decent Shallot one choice is the banana Shallot ‘Zebrune’ & for a mildew-resistant seed that is flavoursome try ‘Santero’. 

When To Plant Onion Seeds UK?

Sow onion seeds directly into drills outside in March onwards or you can kick them off in a propagator or glasshouse if you are lucky enough to have one.

How To Grow Onion Plants From Seed?

  • To sow on prick out into trays 8 x 6 or into individual tray cells. Make sure soil is kept moist but not wet to avoid any fungal problems
  • Onions enjoy a rich but free-draining soil so plenty of Organic matter should be dug into the area prior to sowing or planting
  • Water well in the early stages to get the bulbs to swell as they begin to form.
  • Onions are great for interplanting with other crops such as Lettuce, Carrots, Brassicas and Tomatoes to name some, avoid though planting with Legumes like Peas and Beans. Intercropping plants is a great `way of maximising the use of your growing area and may prevent certain pests

How To Harvest Onions?

  • Onions are ready to harvest when you see the bulb on the surface and foliage starts to flop over. Do this in damp conditions 

Onions are often bountiful crops and can be planted close together. Let them dry out in the sun for 2-3 weeks and then transfer them to storage. They are remarkably easy to store and will last a good length of time. Keep them in dry cool conditions and if it is possible in crate with straw or sand. A garage would be perfect. 

Buy onion seeds online

Offer code applied!