Snow Peas in Zone 3B — Great Plains

Snow peas are a fantastic addition to any Great Plains garden. Their crisp, sweet pods are delicious raw, stir-fried, or added to salads. Plus, they're one of the first veggies you can harvest, offering a taste of spring after a long winter.

Our region's extreme weather can be a challenge, but snow peas are quick growers. With a 118-day growing season, you'll have plenty of time to enjoy multiple harvests if you time your planting right.

If you're starting snow peas indoors, transplant them outdoors from late April through mid May, once the soil has warmed up a bit. Be sure to harden them off first by gradually exposing them to the outdoors for about a week before planting.

Plant seedlings 3-4 inches apart, giving them room to climb. Keep an eye on the forecast for late frosts, which can still happen in the Plains during this time. If frost threatens, cover your seedlings with a frost blanket.

Direct sowing is the preferred method for snow peas, and it's easy! You can start as early as early April through early July. Snow peas, like garden peas, thrive in the cooler temperatures of spring.

Prepare your soil by loosening it and adding compost. Sow seeds 3-4 inches apart and about an inch deep. Keep the soil consistently moist until the seeds germinate.

Snow peas need consistent moisture, especially when they're flowering and producing pods. In our Plains climate, that can be tricky with our variable rainfall. During hot stretches, you'll need to water more frequently.

Check the soil moisture by sticking your finger in about 2 inches deep. If it feels dry, it's time to water. Aim for about an inch of water per week, either from rain or irrigation. Water at the base of the plants to avoid wetting the foliage, which can encourage disease in our sometimes humid conditions.

Overwatering can lead to root rot, so make sure your soil drains well. Underwatering will cause the plants to wilt and the pods to be small and tough. A layer of mulch around the base of the plants can help retain moisture and keep the soil cool during the summer heat.

Snow peas are vines and need support to grow properly. A simple string trellis works great. You can also use netting or even a fence.

Install your support at planting time so the vines have something to grab onto as they grow. Gently train the vines to climb the trellis as they develop. Given our windy conditions, make sure your trellis is sturdy and well-anchored to prevent it from blowing over.

You can expect your first harvest of snow peas from early June through late September, about 55 days after planting. The key is to harvest when the pods are flat and you can just barely see the pea outlines inside. The pods should be translucent and crisp.

Harvest by gently snapping the pods off the vine, being careful not to damage the plant. Regular harvesting encourages continued production. As our first frost approaches in mid- September, harvest all remaining pods, even if they're a bit small, to enjoy the last of your crop.

Here are a few common problems you might encounter with snow peas in the Great Plains:

• Powdery Mildew
• What it looks like: White or grayish powdery coating on leaves, stems. Leaves curl, yellow, and die.
• What causes it: Fungi thrive in warm days, cool nights, and moderate humidity. Dry leaf surfaces favor it. This can be common with our temperature swings.
• How to fix/prevent it: Improve air circulation through spacing. Remove affected leaves. Neem oil or potassium bicarbonate sprays help. Milk spray (1 part milk to 9 parts water) is effective. Plant resistant varieties.
• Pea Aphids
• What it looks like: Small, soft-bodied insects clustered on stems and leaves, often causing distorted growth. Sticky honeydew.
• What causes it: Aphids thrive in moderate temperatures. They suck plant sap.
• How to fix/prevent it: Strong blast of water from the hose dislodges them. Insecticidal soap or neem oil can help. Encourage beneficial insects like ladybugs.
• Root Rot
• What it looks like: Yellowing leaves, stunted growth, wilting, mushy brown roots.
• What causes it: Overwatering and poorly drained soil. Fungi thrive in wet conditions. Heavy clay soils of the Plains can make this worse.
• How to fix/prevent it: Improve soil drainage with compost and raised beds. Water less frequently. Avoid overwatering.
• Fusarium Wilt
• What it looks like: Wilting on one side of the plant first, then spreading. Yellow leaves starting on one side. Brown streaks in stem when cut open.
• What causes it: Soil-borne fungus (Fusarium oxysporum). Persists in soil for years. Enters through roots. Warm soil temperatures favor it.
• How to fix/prevent it: No cure once infected – remove and destroy the plant. Plant resistant varieties (look for 'F' on seed labels). Rotate crops on a 4-year cycle. Solarize soil in hot zones. Raise soil pH above 6.5.

Great Plains Specific Challenges: Our hot summers and variable rainfall can stress snow peas, making them more susceptible to these problems. Be vigilant about watering and monitoring for signs of disease or pests. Wind protection is also essential to prevent damage to the vines.

Companion planting can help your snow peas thrive. Carrots and radishes loosen the soil, making it easier for snow peas to grow. Cucumbers and corn provide shade during hot afternoons, helping to keep the soil cool. Lettuce is a good ground cover that suppresses weeds and retains moisture.

Avoid planting snow peas near onions or garlic, as they can inhibit their growth. These alliums are allelopathic, meaning they release chemicals that can harm peas.