When to plant peas in the UK is earlier than most people think. The main sowing window runs from March to June for a steady summer crop, but you can start as early as February in mild areas, and hardy varieties can even go in during autumn to overwinter. Peas are one of the first things I sow every year, because they shrug off cold that would kill a bean and they crop best in the cool of spring rather than the heat of high summer. Sow too late and you fight mildew and disappointing pods in July; get them in early and they romp. If you have left it later than that, see whether it is too late to plant peas.

Peas taught me to stop waiting for the weather to feel like spring. For years I held off sowing until it was warm and pleasant, the way you would with beans, and every year my peas were mediocre because they were flowering into the first proper heat and getting hit by mildew. Once I started sowing them cold and early, in March when the soil was barely workable, everything changed. They are a cool-season crop at heart, and understanding that is most of the battle.

Why Peas Go In So Early

Peas are hardy in a way that catches beginners out. The seedlings tolerate frost, the plants actively prefer cool weather, and they set their best pods in the mild, damp conditions of a British spring. That is the opposite of tender crops like runner beans and tomatoes, which have to wait until the frosts have gone.

This is why peas belong in the first wave of the growing year, alongside broad beans and the earliest salads. Get them established while it is still cool and they build strong plants and heavy trusses of pods before summer arrives. Leave them until it warms up and they never quite catch up, because peas hate heat and dry soil, and a June-sown crop spends its life playing catch-up against mildew and drought. The wider picture of what goes in when sits in the vegetable planting calendar.

Sowing Peas Direct or Starting Them Indoors

You can sow peas straight into the ground or start them off under cover, and I do both depending on the month. From April onwards, when the soil has warmed a little, direct sowing is simplest: make a shallow flat drill a couple of centimetres deep, scatter the seeds a few centimetres apart, cover, and firm gently. They will be up in a week or two.

Early in the season, though, cold wet soil rots as many seeds as it sprouts, so for February and March sowings I start them indoors. The old allotment trick is to sow a row of peas in a length of guttering filled with compost, grow them on somewhere cool and bright, then slide the whole ribbon of plants into a prepared trench when the weather settles. It gets you weeks ahead and dodges the worst of the slugs and mice, which love a freshly sown pea. If your soil is the heavy sort that stays cold and wet, it is worth reading how to tell your soil type so you know what you are dealing with.

Get the Soil Right First

Peas are not greedy, but they do want two things: reasonable drainage and soil that is not too acidic. Cold, waterlogged ground is the number one reason early sowings fail, because the seed simply sits and rots before it can germinate. If your beds hold water through winter, either wait for them to dry out or improve the drainage first.

They also fix their own nitrogen from the air, so they do not need a rich, heavily manured bed, and too much nitrogen actually gives you lush leafy plants with few pods. What helps most is soil in decent condition with a bit of well-rotted organic matter worked in, as covered in improving garden soil. On compacted ground the roots struggle, so if yours is the kind that sets hard, soil compaction in UK gardens is worth a look before you sow.

Month by Month

February

In mild areas and the south, you can make a first sowing under cover or into a sheltered, well-drained bed with cloches over it. This is a gamble for an early crop rather than a main sowing, so do not commit all your seed to it. In the north, hold off.

March

The month peas really get going across most of the country. Sow indoors or into warming soil under cloches. This is my main early sowing, and plants started now crop beautifully in June before the heat and mildew arrive.

April

Prime direct-sowing time everywhere. The soil is warm enough for reliable germination outdoors, and April sowings are about the most foolproof of the lot. Keep sowing a short row every couple of weeks for a succession.

May and June

You can keep sowing into May and early June, but choose quick, mildew-resistant varieties and be ready to water, because these later crops mature as the weather warms and are more prone to problems. There is more on the wider month in what to sow in May. After June, wait for an autumn sowing rather than fighting high summer.

Where You Garden Shifts the Dates

The dates above are for the middle of the country, and the UK stretches them by a good few weeks. In the South West and along the south coast, mild winters mean you can often sow from February and get away with autumn sowings for an overwintered crop. London and the South East run similarly early, helped by the warmth cities hold.

Across the Midlands the standard dates apply as written. In northern England, push the first sowings back to late March or April and skip the February gamble. In Scotland, later still, with April the sensible starting point in most areas and cold wet spring soil the main thing to work around. Local knowledge beats any calendar, and if you are unsure how late your frosts run, the last frost date checker gives a date for your postcode, though peas are hardy enough that a light frost does them no harm.

Spacing, and Why Peas Need Support

Sow seeds a few centimetres apart in the row, or in a double row about 20cm apart, which lets the plants support each other and makes the most of a support structure between them. Do not agonise over exact spacing; peas are forgiving, and a slightly crowded row still crops well.

Support is the bit people skip and regret. Most pea varieties want something to climb, and even the so-called dwarf types flop and sprawl without a bit of help, which leaves the pods on the wet ground for the slugs. Traditional pea sticks, twiggy prunings pushed into the row, are perfect and free. Otherwise netting or a few bamboo canes with string between them do the job. Get the support in at sowing time or just after, because pushing canes into an established row tears through the roots.

Peas in Raised Beds and Containers

Peas do well in raised beds, which warm and drain faster than open ground and let you sow a week or two earlier. They also grow perfectly happily in a decent-sized container, which suits a patio or a small garden, and dwarf varieties are the natural choice there.

The one thing containers demand is water, because peas hate drying out and a pot dries fast once the plants are cropping in early summer. Keep them consistently moist and give even a dwarf variety something low to scramble up. The general principles are in growing vegetables in pots.

The Mistakes That Spoil a Pea Crop

Three things account for most pea disappointment. The first is sowing into cold waterlogged soil, which rots the seed before it germinates, and it is why starting early sowings indoors pays off. The second is planting too late, so the crop matures into summer heat and mildew instead of cool spring; peas genuinely do want to be early. The third is ignoring the birds and mice, because pigeons strip young pea shoots and mice dig up the seed, so a bit of netting or twiggy cover over a new sowing saves a lot of heartache.

Fix those and peas are close to foolproof. They are among the most rewarding crops for the effort involved, and a handful eaten raw straight from the pod in June is one of the genuine pleasures of growing your own.

When Will They Be Ready?

Peas take roughly 11 to 14 weeks from sowing to picking, depending on the variety and the weather. So a March sowing usually means peas from mid June, an April sowing from July, and successional sowings keep you cropping through the summer if you kept them coming every couple of weeks. Left it late and wondering if there is still time? See whether it is too late to plant vegetables.

Pick as soon as the pods are plump but still bright green and tender, and pick often, because regular picking tells the plant to keep producing while leaving pods to fatten and go starchy tells it to stop. Peas are at their sweetest within minutes of picking, which is the whole reason to grow your own, since the sugars turn to starch fast once they leave the plant. That is one taste the supermarket simply cannot sell you.

What Goes In Alongside Peas

Peas sit with the hardy early crops, so they follow the same rules as broad beans, carrots and onions: cool-season things that can go out well before the tender crops. If you want the full growing detail beyond timing, from varieties to harvesting, that lives in how to grow peas in the UK.

Plan the garden in those two halves, hardy things that go out early and tender things that must wait, and peas slot neatly into the first wave. The broad beans that go in around the same time make natural companions, both cropping while the summer vegetables are still finding their feet.

When to Plant Peas in the UK: Frequently Asked Questions

A Sensible Place to Start

If you take one thing from this, let it be that peas want to go in early. Sow a row in March, either indoors to start with or under cloches, and get the support in at the same time. That single early sowing will teach you more than any amount of reading, and peas are forgiving enough that a first attempt almost always gives you something.

Then sow another short row a fortnight later, and another after that, and you will be picking sweet pods from June well into the summer. Start with a reliable early variety, keep the mice off, and be earlier than feels natural. Few crops reward getting the timing right quite as generously as peas do.