When to Plant Cayenne Pepper 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

Start Seeds Indoors

Tuesday, February 24, 2026

Transplant Outdoors

Tuesday, May 19, 2026

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

Pro tip: Start Cayenne Pepper seeds indoors 10 weeks before your last frost date, then transplant outdoors around Tuesday, May 19, 2026.

Add to Calendar (.ics)

🌿 Plant Details

Scientific Name Capsicum annuum

Days to Maturity 75 days

Mature Height 24-36"

Spread 18"

Type Bush

Fruit Size Small (2-5 inch pods)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

Ready to Plant Cayenne Pepper in White Sulphur Springs?

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

🛒 Buy on Amazon 🌿 True Leaf Market

* Affiliate links — we may earn a small commission at no extra cost to you.

🤝 Good Companions

BasilCarrotTomato

⚠️ Avoid Planting Near

Fennel

🤝

Full Companion Planting Guide for Cayenne Pepper

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

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

* Affiliate links — we may earn a small commission at no extra cost to you.

Common Cayenne Pepper Varieties

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

Ring of Fire

open-pollinated 60d

Hot, thin-walled cayenne that matures early and dries beautifully for flakes and powder.

Long Slim Cayenne

open-pollinated 70d

Classic 5–6 inch thin pepper with classic cayenne heat; great fresh or dried.

Golden Cayenne

open-pollinated 70d

Yellow version of the classic cayenne; slightly milder with a fruity undertone.

🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let peppers ripen fully red before collecting seeds.

Processing

Cut open ripe peppers, carefully remove seeds, spread to dry 1–2 weeks. Wear gloves.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Crosses with all Capsicum annuum peppers (bell, jalapeño, etc.). Isolate by 300 feet for pure seed.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Cayenne Pepper. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

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

In White Sulphur Springs (Zone 4b), start Cayenne Pepper seeds indoors around Tuesday, February 24, 2026 and transplant outdoors around Tuesday, May 19, 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 Cayenne Pepper take to grow? +

Cayenne Pepper typically matures in about 75 days from transplanting. In White Sulphur Springs, that means you can expect harvest around Tuesday, May 19, 2026 plus 75 days.

Should I start Cayenne Pepper indoors or direct sow in Montana? +

Cayenne Pepper should be started indoors 10 weeks before your last frost date. In White Sulphur Springs, that means starting around Tuesday, February 24, 2026.

📚 More Cayenne Pepper Planting Guides

🗺️

Cayenne Pepper in Montana

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Cayenne Pepper Guide

All cities in your zone · Avg dates

→

Other Plants for White Sulphur Springs

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Cayenne Pepper in Zone 4b

Cayenne Pepper (Capsicum annuum) is a popular garden vegetable. In White Sulphur Springs, Montana, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, February 24, 2026.

Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Cayenne Pepper seedlings outdoors around Tuesday, May 19, 2026, about 2 weeks after your last frost date.