When to Plant Mustard in Colorado Springs, Colorado (80921)

Location

Colorado Springs, Colorado

ZIP Code

80921

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Saturday, March 14, 2026

Based on last frost Saturday, April 25, 2026 · Zone 5b

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

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🌿 Plant Details

Scientific Name Brassica juncea

Days to Maturity 56 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Mustard in Colorado Springs?

Get your seeds now so they're ready by Saturday, March 14, 2026.

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🤝 Good Companions

CabbageCauliflowerRadishBrussel SproutTurnip

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Full Companion Planting Guide for Mustard

See which plants help Mustard 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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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Harvest seed pods just as they turn tan — before they shatter and seeds drop.

Processing

Cut stalks into a bag, thresh to release seeds from pods, winnow lightly.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Mustard crosses freely within the Brassica family — isolate by 300 feet from other mustard varieties.

Frequently Asked Questions

When should I plant Mustard in Colorado Springs, Colorado? +

In Colorado Springs (Zone 5b), direct sow Mustard outdoors around Saturday, March 14, 2026.

What is the last frost date for Colorado Springs, Colorado? +

The average last spring frost date for Colorado Springs, Colorado (ZIP 80921) is around Saturday, April 25, 2026. This is based on NOAA climate normals for USDA Zone 5b.

How long does Mustard take to grow? +

Mustard typically matures in about 56 days from direct sowing. In Colorado Springs, that means you can expect harvest around Saturday, March 14, 2026 plus 56 days.

Should I start Mustard indoors or direct sow in Colorado? +

Mustard does best when direct sown outdoors. In Colorado Springs, sow directly around Saturday, March 14, 2026.

📚 More Mustard Planting Guides

🗺️

Mustard in Colorado

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5b Mustard Guide

All cities in your zone · Avg dates

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Growing Mustard in Zone 5b

Mustard (Brassica juncea) is a popular garden vegetable. In Colorado Springs, Colorado, which is in USDA Hardiness Zone 5b, you should direct sow seeds around Saturday, March 14, 2026.

Your average last frost date is Saturday, April 25, 2026. Mustard grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.