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A freshly picked sweetcorn cob held up against a backdrop of sunflowers
Half-hardy — needs some protection

When to plant
sweetcorn in the UK

Plant in a block, not a row — they're wind-pollinated and need neighbours. Each plant gives you 1-2 cobs, so don't be stingy with numbers.

14wto harvest
45cmspacing
8°Cmin soil temp
half-hardyhardiness

Growing journey

Last frost
Sow indoors5w before frost
Direct sow1w after frost
Plant out2w after frost
Harvest16w after frost

14 weeks from planting out to harvest · Start indoors 7 weeks before planting out

Get sweetcorn seeds

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What sweetcorn need

Full sun. Sheltered spot. Rich soil.

Spacing

45cm

45cm between plants

These are larger plants — give them plenty of space for air circulation.

Varieties

Varieties to try

Swift

Early-maturing — good for shorter UK summers

Golden Bantam

Heritage, deep yellow, sweet

Lark

Supersweet type, reliable

When to sow sweetcorn

Sow indoorsMarchApril
Direct sowAprilMay
Plant outAprilMay

Based on UK average frost date. Enter your postcode for exact dates, or find your city.

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Seeds

Where to buy sweetcorn seeds

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Kit

What you'll need for sweetcorn

The stuff beginners wish they'd bought sooner.

Module trays (24-cell)Amazon

Each seedling gets its own root space. Less root disturbance when planting out means faster establishment.

More in our equipment guide →
Horticultural fleeceAmazon

Protects from late frost and gives seedlings a head start. Keep a roll in the shed — you'll use it constantly.

More in our equipment guide →
Organic slug pelletsAmazon

Ferric phosphate — pet-safe and organic-approved. Young plants are slug magnets. One night can finish them.

Links go to Amazon. We earn a small commission at no extra cost to you.

Get your exact dates

Enter your postcode for personalised planting dates for sweetcorn.

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