When to Plant Pea in White Sulphur Springs, Montana (59645)

Location

White Sulphur Springs, Montana

ZIP Code

59645

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Tuesday, March 24, 2026

Based on last frost Tuesday, May 5, 2026 · Zone 4b

Pro tip: Sow Pea directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Pisum sativum

Days to Maturity 60 days

Mature Height 24-72"

Spread 6"

Type Vine

Fruit Size Small (2-3 inch pods)

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1 inch/week)

↔️

Spacing

3" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 7-14 days

Ready to Plant Pea in White Sulphur Springs?

Get your seeds now so they're ready by Tuesday, March 24, 2026.

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🤝 Good Companions

CarrotRadishTurnipCucumberCorn

⚠️ Avoid Planting Near

OnionGarlic

🤝

Full Companion Planting Guide for Pea

See which plants help Pea thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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Common Pea Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Oregon Sugar Pod

snow 65d

Flat snow pea with sweet, edible pods; the standard snow pea for home gardens.

Sugar Snap

snap 70d

The original snap pea; thick, crunchy pods with round peas inside — best eaten fresh.

Lincoln

shelling 67d

Shelling pea with outstanding sweet flavor; best picked young when peas fill the pod.

Wando

shelling 68d

Heat-tolerant shelling pea that produces longer into warm weather than other varieties.

Common Pea Problems

What to watch for — and how to fix it before it spreads.

🐛

Pests

Pea Aphid

Large, bright green aphids transmit pea enation mosaic virus and pea mosaic virus; can collapse entire plants.

Fix:

Spray with insecticidal soap; plant resistant varieties; control ants that farm aphid colonies.

Pea Moth

Larvae feed inside developing pods, ruining shelling peas; fine entry holes visible on pods.

Fix:

Use row covers from flowering; choose early varieties that finish before peak moth flight.

Thrips

Rasp flower petals and pods causing "silvering"; transmit tomato spotted wilt virus.

Fix:

Apply spinosad; use blue sticky traps; avoid dusty conditions.

🍂

Diseases

Powdery Mildew

White coating on leaves and pods; inevitable in most gardens in warm weather — accelerates end-of-season decline.

Fix:

Plant early to avoid heat; choose resistant varieties; apply sulfur or potassium bicarbonate.

Fusarium Wilt

Soil-borne fungus causing yellowing from the bottom up; plants die rapidly.

Fix:

Rotate crops every 4+ years; plant resistant varieties; improve drainage.

Damping Off

Seedlings collapse at the soil line in cold, wet spring soil.

Fix:

Improve drainage; use raised beds; plant treated or pelleted seed.

💡

Common Mistakes

Planting too late

Peas are a cool-season crop that fail in heat; most gardeners plant 2–4 weeks too late.

Fix:

Direct sow as soon as soil can be worked in spring — 6 weeks before last frost is not too early.

Not providing support

Climbing varieties left unsupported tangle and mat on the ground, promoting disease.

Fix:

Install a trellis, netting, or brush at planting — before peas need it.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let pods dry completely on the vine — they'll turn yellow then tan-brown.

Processing

Shell dried pods, lay seeds flat for 1 week to complete drying.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Peas self-pollinate inside the closed flower bud before opening — excellent for variety purity.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 16 per sq ft of Pea. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Pea in White Sulphur Springs, Montana? +

In White Sulphur Springs (Zone 4b), direct sow Pea outdoors around Tuesday, March 24, 2026.

What is the last frost date for White Sulphur Springs, Montana? +

The average last spring frost date for White Sulphur Springs, Montana (ZIP 59645) is around Tuesday, May 5, 2026. This is based on NOAA climate normals for USDA Zone 4b.

How long does Pea take to grow? +

Pea typically matures in about 60 days from direct sowing. In White Sulphur Springs, that means you can expect harvest around Tuesday, March 24, 2026 plus 60 days.

Should I start Pea indoors or direct sow in Montana? +

Pea does best when direct sown outdoors. In White Sulphur Springs, sow directly around Tuesday, March 24, 2026.

📚 More Pea Planting Guides

🗺️

Pea in Montana

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Pea Guide

All cities in your zone · Avg dates

→

Other Plants for White Sulphur Springs

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Growing Pea in Zone 4b

Pea (Pisum sativum) is a popular garden vegetable. In White Sulphur Springs, Montana, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, March 24, 2026.

Your average last frost date is Tuesday, May 5, 2026. Pea grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.