How to Grow Snap Peas

Growing guide

Overview

Snap peas are sweet, crisp edible-pod peas that are eaten whole. Gardeners love them because they are cold-tolerant, fast to harvest, and easy to grow. They need full sun, moderate, even moisture, and a trellis for climbing vines.

Soil & planting prep

Grow snap peas in loamy, well-drained soil with a pH between 6.0 and 7.0. Work 1 inch of compost into the soil before planting, but avoid high-nitrogen fertilizer since peas fix their own nitrogen. Sow seeds 1 inch deep and 1 to 2 inches apart, then thin plants to 2 to 3 inches apart.

When to plant

Direct sow snap peas in early spring as soon as the soil can be worked, about 4 to 6 weeks before your average last frost date. They tolerate frost and germinate in cool soil, so there is no need to wait for warm weather. Time planting so the crop finishes before hot summer weather arrives, because heat stops pod production.

How to plant

1. Choose a full-sun spot and install a trellis before planting; tall snap pea varieties often climb 5 to 6 feet.
2. Loosen the soil and mix in about 1 inch of compost; do not add high-nitrogen fertilizer.
3. Sow seeds 1 inch deep and 1 to 2 inches apart along the base of the trellis.
4. Water lightly after sowing and keep the soil evenly moist until seedlings emerge in 7 to 14 days.
5. When seedlings are 2 to 3 inches tall, thin them to 2 to 3 inches apart and gently guide tendrils onto the trellis.

5 common mistakes to avoid

• Planting too late: snap peas shut down in heat, so a late sowing often produces vines but few pods. Sow about 4 to 6 weeks before the last frost date.
• Skipping the trellis: most snap peas climb 5 to 6 feet, and letting vines sprawl leads to disease, hard picking, and smaller pods. Install the trellis before planting.
• Giving too much nitrogen: peas fix their own nitrogen, so rich or high-nitrogen fertilizer causes leafy growth at the expense of flowers and pods. Use compost only.
• Letting soil dry out during flowering and pod fill: inconsistent moisture causes tough pods and poor pod set. Water evenly from bloom through harvest.
• Leaving pods on the vine too long: overripe pods turn starchy and signal the plant to stop producing. Pick every day or two as pods become plump and sweet.

Harvesting & storage

Snap peas are ready about 60 to 70 days after planting, when pods are plump, crisp, and snap cleanly but the seeds have not bulged heavily. Harvest by holding the stem and pulling the pod gently, or use snips to avoid damaging the vine. Refrigerate unwashed pods in a plastic bag and use within about 3 to 5 days.

Companion planting

Good companions include lettuce, radishes, carrots, and turnips; peas add nitrogen to the soil that leafy neighbors can use. Avoid planting snap peas near onions, garlic, or shallots, which can suppress their growth.

Growing in containers

Snap peas do well in containers. Use a pot that holds at least 5 gallons, add a small trellis or stakes, and plant seeds 2 to 3 inches apart in full sun with consistent watering.

Pro tips

Direct sow as soon as soil can be worked — 6 weeks before last frost. Install a trellis before planting (tall varieties reach 5-6 feet). Pick daily when pods are plump and sweet. Heat stops production — plant a fall crop as well.