Allium

Onion

Allium cepa

Plant sets in March, harvest fat globes in August.

Sun

Full sun

Water

Moderate

Soil

Well-drained

Difficulty

Easy

Container

Yes

Edible part

Bulb

Lifecycle

Biennial

Hardiness

Hardy

beginnerlong-season

Plants well with

Where to source

Get growing in United Kingdom

Some links may earn us a small commission — at no cost to you.

Thompson & Morgan

Stocks cold-hardy onion varieties suited to UK seasons and short-day requirements for northern latitudes.

Crocus

Offers terracotta pots with drainage ideal for container onion growing in London's damp climate.

Amazon UK

Provides onion sets and planting tools for efficient direct sowing in UK gardens.