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Onion & Leek Seeds

Grow leek and onion seeds – it's easier than you think. As well as being excellent value for money, growing onion and leek seeds gives you access to a wide selection of varieties that aren't often available as sets. Our excellent vegetable seed range features spring, white, red, and brown onions, and shallots of all sorts. When it comes to leeks, the choice on offer features some truly outstanding garden and exhibition varieties. Find out more about growing leeks and onions at our dedicated 'Onions, Garlic, and Shallots' information page.

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Leek and onion seeds

Using leek and onion seeds is a cost effective way of producing two kitchen staples. It also allows you to grow something different, such as red spring onion ‘Apache’, Leek ‘Northern Lights’ which has stems that turn purple as temperatures drop, and onion ‘Globo’ that can weigh up to 1kg! Read our advice on how to grow onion and leek seeds and find more tips in the Frequently Asked Questions below.

When should you sow onion and leek seeds?

Start onion seeds off indoors in February or March. Leek seeds should be sown outdoors in March and April.

Can you grow onion seeds in a container?

Yes, spring onions such as ‘White Star’, ‘Purplette’, ‘White Lisbon’ and ‘Pompeii’ are all suitable for growing in containers. Try growing with mint to deter onion flies, but beware mint likes to spread out.

Which leeks crop earliest?

One of the earliest leeks to crop is ‘Bulgaarse Reuzen - Lincoln’. Sow in early spring and it will be ready to harvest in late summer.

Which onion seeds produce the largest onions?

As their names suggest, ‘Galacticus’ and ‘Globo’ are great onion seeds for producing enormous onions. Both are fantastic varieties for the show bench.

Are onion seeds the same as nigella seeds?

No, they are not the same thing although nigella seeds are often wrongly called black onion seeds. Nigella seeds come from N. sativa, an annual flower.