When To Plant Peas In Utah

If you’re wondering when to plant peas in Utah, timing is everything for a sweet, abundant harvest. Our state’s unique climate, with its late frosts and hot summers, means you need to get your peas in the ground at just the right moment. This guide will walk you through Utah’s ideal planting schedule, from early spring to a potential fall crop, ensuring you maximize your growing season.

For most Utah gardeners, the prime window for planting peas is as soon as the soil can be worked in the spring. This is typically between mid-March and mid-April, depending on your specific location and elevation. The key is to get them growing during cool weather, as peas thrive in temperatures between 55°F and 65°F.

Understanding Utah’s Climate Zones

Utah ranges from USDA Hardiness Zones 4 through 9. Your zone dictates your safest planting dates.

Northern Utah & Higher Elevations (Zones 4-5): Plant from early April to early May. Wait for the snow to melt and soil to dry out a bit.
Wasatch Front & Valleys (Zones 6-7): This is the sweet spot. Aim for mid-March through April. St. Patrick’s Day is a traditional target date for many.
Southern Utah & Warm Deserts (Zones 8-9): You can plant as early as late February or early March. A fall planting is also very successful here.

Always use your local frost dates as a guide. Peas can tolerate a light frost, so you can plant them 4-6 weeks before your last average spring frost date.

Soil Temperature: The Best Indicator

Air temperature can be deceiving. Soil temperature is a more reliable sign. Peas germinate best when soil is at least 45°F. A simple soil thermometer is a great investment.

45°F: Seeds will germinate, but slowly.
50-60°F: Ideal for quick, strong germination.
70°F+: Germination rates drop, and plants become stressed.

If the ground is still frozen or a muddy mess, wait a week. Working soggy soil ruins its structure.

Choosing Your Pea Varieties

Picking the right type for your goals matters. There are three main kinds:

Garden (English) Peas: You shell these to eat the plump seeds inside. Varieties like ‘Lincoln’ and ‘Green Arrow’ do well here.
Snow Peas: You eat the flat, tender pod whole. ‘Oregon Sugar Pod’ is a reliable, productive choice for Utah.
Snap Peas: You eat the juicy, thick pod and the peas together. ‘Sugar Snap’ is a classic, beloved favorite.

Consider also bush vs. climbing types. Bush peas need less support, while climbing peas yield more in less space but need a trellis.

Step-by-Step Planting Guide

Prepare the Soil: Choose a sunny spot. Peas prefer well-drained soil amended with compost. They fix their own nitrogen, so avoid high-nitrogen fertilizers.
Plant the Seeds: Sow seeds 1 inch deep and 2 inches apart. Space rows about 18-24 inches apart. You can soak seeds overnight to speed germination, but it’s not required.
Provide Support: Install trellises or supports at planting time to avoid disturbing roots later. Even bush peas appreciate a short, bushy support.
Water Gently: Water the bed thoroughly after planting. Keep the soil consistently moist but not waterlogged until seeds sprout.

The Secret to a Fall Pea Harvest

Many Utah gardeners miss out on a fantastic second season. You can plant peas in late summer for a fall harvest. The trick is counting backwards.

Find your average first fall frost date.
Choose a fast-maturing variety (often listed as days to maturity).
Plant seeds 8-10 weeks before that first frost date.

For the Wasatch Front, this usually means planting around mid-August. The challenge is keeping the soil cool for germination; use shade cloth or plant in a spot that gets afternoon shade.

Common Growing Challenges in Utah

Utah’s dry air and temperature swings create specific issues.

Powdery Mildew: This white fungus loves our dry days and cool nights. Prevent it by choosing resistant varieties, ensuring good air circulation, and watering at the soil level, not on the leaves.
Pea Aphids: These tiny green pests cluster on new growth. Blast them off with a strong spray of water or use insecticidal soap.
Birds & Rodents: They love digging up seeds. Use row covers or netting immediately after planting to protect your seeds.

Harvest regularly to keep plants producing. Pick peas in the morning when they’re crispest. If you miss a few and they get too big, just let them dry on the vine for next year’s seed.

Companion Planting for Healthier Peas

Good neighbors help your peas grow better. Plant them near:

Carrots, radishes, and cucumbers.
Herbs like mint (in a pot to control it) and cilantro.
Corn, which can act as a natural trellis.

Avoid planting peas near onions, garlic, or shallots, as they can inhibit growth.

FAQs: Planting Peas in Utah

Can I plant peas from a store-bought bag of dried peas?
You can, but they may not germinate as reliably as seed-packet peas, which are tested for viability. Also, some dried food peas are treated to prevent sprouting.

What if I missed the spring planting window?
Don’t worry! Try a fast-maturing variety for a fall crop. It’s often a more pleasant gardening experience with fewer pests.

How often should I water my pea plants?
Water deeply once a week if there’s no rain. Increase to twice a week when pods are forming, especially if it’s hot. Mulch helps retain moisture.

Why are my pea plants yellowing?
This could be overwatering, poor drainage, or a natural sign the plant is finishing its life cycle. If it happens early, check your soil moisture.

Can I grow peas in containers in Utah?
Absolutely. Choose a deep pot (at least 12 inches) and a bush or dwarf variety. Ensure it has excellent drainage and a trellis for support.

By following Utah’s ideal planting schedule and these simple tips, you’ll enjoy a long, productive pea season. There’s nothing quite like the taste of fresh peas picked right from your own garden, and with a little planning, you can have two harvest each year. Just remember to get those seeds in the ground early, and don’t forget to try a fall planting for extended enjoyment.