Minnesota’s long, cold winters mean you’ll be waiting patiently for the snow to melt and the ground to thaw. The best time to plant peas in Minnesota is as soon as the soil can be worked in early spring, typically from late March through mid-April. Peas are a cool-season crop that thrives in the chilly, moist conditions of a Minnesota spring.
Planting too late means your peas will suffer in the summer heat. The key is to get those seeds in the ground while the soil is still cold and the air is crisp. This guide will walk you through everything you need to know for a successful pea harvest in the Land of 10,000 Lakes.
Best Time To Plant Peas In Minnesota
The exact date varies by your location within the state. Southern Minnesota can start as early as late March, while northern areas near Duluth or the Iron Range may need to wait until mid-to-late April. The general rule is to plant 4 to 6 weeks before your last expected frost date.
Peas can handle light frosts and even a dusting of snow. The seeds germinate best when soil temperatures are between 40°F and 70°F. If the soil is too wet, wait a few days to avoid rot. A simple test: grab a handful of soil and squeeze it. If water drips out, it’s too wet.
Understanding Your Minnesota Hardiness Zone
Minnesota spans USDA hardiness zones 3a to 4b in most areas, with some southern pockets in zone 5a. Your specific zone affects the planting window. Check your zone online using your zip code.
- Zone 3 (northern MN): Plant peas from April 15 to May 1.
- Zone 4 (central MN): Plant peas from April 1 to April 20.
- Zone 5 (southern MN): Plant peas from March 25 to April 15.
These are guidelines, not strict rules. Watch your local weather forecast. If a warm spell arrives early, you might get a head start. If snow lingers, be patient.
Soil Preparation For Peas
Peas prefer well-drained, loamy soil with a pH between 6.0 and 7.5. They don’t need heavy fertilization because they fix their own nitrogen. Too much nitrogen will give you lush leaves but few pods.
Work the soil only when it’s dry enough to crumble. Avoid walking on wet soil to prevent compaction. Add a thin layer of compost if your soil is poor. Peas are light feeders.
Testing Soil Temperature
Use a soil thermometer for accuracy. Insert it 2 inches deep. Wait until the temperature is consistently above 40°F. If you don’t have a thermometer, watch for forsythia bushes blooming—that’s a natural sign that soil is warm enough.
Choosing The Right Pea Varieties For Minnesota
Not all peas are created equal. In Minnesota’s short spring, you need varieties that mature quickly. Look for “early” or “short-season” types. Here are top choices:
- Shelling Peas: ‘Lincoln’, ‘Green Arrow’, ‘Maestro’—mature in 60-70 days.
- Snow Peas: ‘Oregon Sugar Pod II’, ‘Mammoth Melting Sugar’—mature in 55-65 days.
- Snap Peas: ‘Sugar Ann’, ‘Super Sugar Snap’—mature in 55-65 days.
Avoid long-season varieties like ‘Tall Telephone’ unless you have a cool, extended spring. They may not produce before summer heat hits.
Inoculants For Better Growth
Pea inoculant is a powder containing beneficial bacteria. It helps peas fix nitrogen from the air. This is especially helpful in Minnesota soils that may lack these natural bacteria. Simply moisten the seeds and dust them with inoculant before planting.
Inoculant is cheap and can double your yield. It’s available at most garden centers or online. Don’t skip this step if you want a bountiful harvest.
Step-By-Step Planting Guide
Follow these steps for a successful pea planting in Minnesota:
- Prepare the bed: Remove weeds and rocks. Rake the soil smooth.
- Create a trench: Use a hoe or your finger to make a 1-inch deep furrow. For clay soil, plant only ½ inch deep.
- Space the seeds: Drop seeds 2 inches apart in the trench. For bush varieties, space rows 18 inches apart. For climbing types, space rows 3 feet apart.
- Cover and water: Gently cover seeds with soil and pat down. Water lightly with a gentle spray.
- Mark the row: Use a plant marker or stick so you remember where you planted.
Peas need support for climbing varieties. Install a trellis, netting, or chicken wire at planting time. Doing it later can damage roots.
Succession Planting For Extended Harvest
To enjoy peas longer, plant every 2 to 3 weeks until mid-May. This works best if you have multiple beds. For example, plant your first batch in early April, then another in late April, and a final batch in mid-May.
Keep in mind that peas stop producing when temperatures consistently exceed 80°F. In southern Minnesota, that’s often by early June. Succession planting gives you a few extra weeks of harvest.
Caring For Your Pea Plants
Peas are low-maintenance once planted. Here’s what they need:
- Water: Keep soil consistently moist but not waterlogged. About 1 inch of water per week is ideal. Use drip irrigation or a soaker hose to avoid wetting the leaves, which can cause disease.
- Weeding: Peas have shallow roots. Hand-pull weeds carefully to avoid disturbing them. Mulch with straw or grass clippings to suppress weeds.
- Fertilizing: No extra fertilizer needed if you used inoculant. If leaves turn yellow, side-dress with a low-nitrogen fertilizer like 5-10-10.
- Pest control: Watch for aphids and pea weevils. A strong spray of water can knock off aphids. For weevils, use row covers early in the season.
Common Problems In Minnesota
Minnesota’s cool, wet springs can lead to fungal diseases. Powdery mildew is common later in the season. To prevent it, plant resistant varieties and space plants for good air circulation.
If you see yellow leaves or stunted growth, check for root rot. This happens in heavy, poorly drained soil. Improve drainage by planting in raised beds or adding organic matter.
Harvesting Your Peas
Peas are ready to harvest when the pods are plump and bright green. For shelling peas, pick when the pods feel full but before they become tough. For snow peas, pick when the pods are flat and the peas are just visible. For snap peas, pick when the pods are crisp and snap easily.
Harvest every 1-2 days to encourage more production. Use two hands—one to hold the vine and one to pull the pod. Peas left on the vine too long become starchy and tough.
In Minnesota, harvest usually begins in late May to early June, depending on your planting date. The season is short, so check your plants daily once they start flowering.
Storing And Preserving Peas
Fresh peas lose sweetness quickly after picking. Eat them within a few hours for the best flavor. To store, blanch them for 2 minutes in boiling water, then plunge into ice water. Drain and freeze in airtight bags.
You can also can peas using a pressure canner. Dried peas are another option—let pods dry on the vine, then shell and store in a cool, dark place.
Fall Planting For A Second Crop
Yes, you can plant peas again in late summer for a fall harvest. In Minnesota, plant fall peas about 8-10 weeks before the first expected frost. That’s typically from late July to mid-August.
Fall peas benefit from cooler temperatures and less pest pressure. However, they may not produce as heavily as spring plantings. Choose early-maturing varieties to beat the frost.
Water fall plantings well during dry August weather. Mulch to keep soil cool. Harvest before a hard freeze—peas can survive a light frost but not temperatures below 28°F.
Frequently Asked Questions
What is the latest date to plant peas in Minnesota?
The latest date to plant peas in Minnesota is typically mid-May for spring planting. For fall planting, aim for early August. After mid-May, summer heat will likely prevent good pod set.
Can I plant peas in Minnesota in June?
Planting peas in June in Minnesota is not recommended. The heat will stress the plants, and they’ll produce few pods. Stick to early spring or late summer for best results.
Should I soak pea seeds before planting in Minnesota?
Soaking pea seeds is optional but can speed germination. Soak them for 8-12 hours in room-temperature water. Drain and plant immediately. Do not soak longer, as seeds can rot.
How deep should I plant peas in Minnesota soil?
Plant peas 1 inch deep in sandy or loamy soil. In heavy clay soil, plant only ½ inch deep. Deeper planting can delay emergence in cool, wet conditions.
Do peas need full sun in Minnesota?
Peas grow best in full sun, meaning at least 6 hours of direct sunlight daily. In hot summers, partial afternoon shade can help extend the season. Morning sun is ideal.
Final Tips For Minnesota Pea Growers
Start small if you’re new to growing peas. A 10-foot row can yield several pounds of peas. Experiment with different varieties to see what works in your microclimate.
Keep a garden journal. Note your planting dates, weather conditions, and harvest results. This will help you refine your timing each year.
Don’t forget to share your harvest with neighbors. Fresh peas are a treat after a long Minnesota winter. Enjoy the sweet, crunchy rewards of your early spring labor.
With the right timing and a little care, you’ll have a bountiful pea crop that celebrates the end of winter. Happy planting in the North Star State.