How to Grow Peas: A Complete Guide

Peas are one of the most rewarding vegetables to grow in any garden. Whether you have a large allotment or a modest container on a balcony, peas deliver sweet, tender pods that taste nothing like anything you can buy in a shop. This guide covers everything you need to know to grow a plentiful crop from sowing to harvest.

Choosing the Right Pea Variety

Peas fall into three main categories, each suited to different growing situations.

Maincrop and Dwarf Varieties
Kelvedon Wonder and Hurst Green Shaft are reliable maincrop varieties that produce heavy yields on compact plants. These are ideal for smaller gardens or container growing because they need minimal staking.

Climbing and Sugarsnap Varieties
Sugar Snap, Mangetout, and Alderman grow tall, reaching 4 to 6 feet, and benefit from support structures. Sugar Snap and Mangetout are eaten whole, pods and all, while Alderman produces large, classic peas for shelling.

Early Varieties
Feltham First and Meteor are bred to tolerate cooler conditions, making them suitable for early spring sowing. These are the varieties to choose if you want the first peas of the season.

Preparing the Soil

Peas demand well-drained, fertile soil with a pH between 6.0 and 7.5. They are not suited to waterlogged ground, so if your soil is heavy, consider building raised beds or growing in containers.

Prepare the site in autumn by digging in well-rotted manure or garden compost. Avoid adding fresh manure at sowing time because it burns young roots. If your soil is acidic, apply lime during winter to raise the pH into the preferred range.

At sowing time, create a trench 2 to 3 inches deep and fill it with compost. This gives seeds a rich, moisture-retentive bed to germinate in.

Sowing Peas

Direct sowing outdoors works well for most varieties. Wait until the soil has warmed to at least 10C, typically from March through June depending on your location and local conditions.

For an earlier start, sow indoors in newspaper pots from late February. Newspaper pots transplant well because you plant the whole pot, avoiding root disturbance. Place one seed per pot.

Space seeds 2 inches deep and 2 to 3 inches apart within the row. Row spacing depends on variety: dwarf types need about 6 inches between rows, while tall varieties require 12 inches to allow air circulation and easy access at harvest.

Successional sowing every 2 to 3 weeks extends the harvest window, giving you fresh peas over a longer period rather than a single large glut.

Watering and Moisture

Consistent moisture is critical for peas, especially during flowering and pod development. Water thoroughly once or twice a week in dry weather, applying roughly 500ml per plant at each watering.

Never let the soil dry out during germination or flowering. A soaker hose or drip irrigation directed at soil level works better than overhead watering, which can encourage fungal diseases on the foliage.

Supporting Your Plants

Dwarf varieties often stand alone, though a few twiggy sticks pushed in among the plants provides useful support and makes picking easier.

Climbing varieties need proper support from the start. Install trellis, garden netting, or pea sticks when you sow, not after the plants have already begun to scramble. Without support, tall varieties collapse into a tangled mess that is difficult to pick and more prone to disease.

Common Pests and Problems

Pea Moth
This is the most common pest. The adult moth lays eggs on flowers in summer, and the larvae feed inside developing pods. Covering rows with horticultural fleece prevents the moth from reaching the flowers. Choosing early or late-sown varieties also sidesteps the peak egg-laying period.

Powdery Mildew
A white, dusty coating appears on leaves in hot, dry conditions or where air circulation is poor. Improve airflow by correct spacing and watering consistently. Mildew-resistant varieties are available if you have had recurring problems.

Pea Leaf Roll Virus
This virus causes yellowing and curling of leaves and is spread by aphids. Control aphid populations promptly and remove any affected plants to prevent spread. See our pest control guide for methods to manage aphids and other common garden pests.

Root Rot
Yellowing plants that collapse suddenly usually indicate root rot caused by waterlogged soil. Ensure good drainage and avoid sowing peas in the same spot two years running.

Mice
Mice dig up and eat seeds shortly after sowing. Protect the trench with a piece of wire mesh or cloche until seeds have germinated and are growing strongly.

Companion Planting

Peas grow well alongside carrots, turnips, radishes, cucumbers, sweetcorn, beans, and potatoes. The nitrogen-fixing bacteria on pea roots benefit neighbouring plants.

Avoid sowing peas near onions, garlic, or shallots. These alliums inhibit the growth of peas and reduce yields significantly.

Harvesting

Most pea varieties are ready to harvest 12 to 14 weeks after sowing, typically from June through August. Pick when the pods are plump but still smooth and bright green. Once peas become starchy, they lose their sweetness.

Mangetout and Sugar Snap should be harvested when the pods are flat and tender, before the peas inside develop significantly. Check plants every two or three days during peak season because regular picking encourages more flowers and extends the harvest by 4 to 6 weeks.

For dried peas, leave the pods on the plant until they turn brown and dry. This works well if you want to store peas for winter use in soups and stews.

Container Growing

Peas adapt well to containers if you choose dwarf varieties and use deep pots of at least 12 inches. Fill with a mixture of multi-purpose compost and garden soil, ensure drainage holes are open, and water consistently. Containers dry out faster than open ground, so monitor moisture levels daily in summer. Visit our container gardening guide for more tips on growing vegetables in pots.