When to Plant Arugula in Coalmont, Colorado (80430)

Location

Coalmont, Colorado

ZIP Code

80430

USDA Zone

Last Frost

Tuesday, May 5, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Tuesday, April 7, 2026

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

Pro tip: Sow Arugula directly outdoors 4 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Eruca vesicaria subsp. sativa

Days to Maturity 40 days

Mature Height 6-12"

Spread 6"

Type Leaf

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Partial Shade to Full Sun

💧

Water

Regular (keep moist)

↔️

Spacing

6" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 3-7 days

Ready to Plant Arugula in Coalmont?

Get your seeds now so they're ready by Tuesday, April 7, 2026.

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🤝 Good Companions

CarrotLettuceRadishBean

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Full Companion Planting Guide for Arugula

See which plants help Arugula 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

Let plants bolt and seed pods dry on the stalk. Harvest before pods shatter.

Processing

Cut stalks into a bag, dry, thresh to separate seeds from pods.

Seed Viability

Up to 5 years when stored cool, dark, and dry.

Pro Tip

Arugula cross-pollinates readily — isolate by 300 feet from other arugula varieties for pure seed.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Arugula in Coalmont, Colorado? +

In Coalmont (Zone 4b), direct sow Arugula outdoors around Tuesday, April 7, 2026.

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

The average last spring frost date for Coalmont, Colorado (ZIP 80430) is around Tuesday, May 5, 2026. This is based on NOAA climate normals for USDA Zone 4b.

How long does Arugula take to grow? +

Arugula typically matures in about 40 days from direct sowing. In Coalmont, that means you can expect harvest around Tuesday, April 7, 2026 plus 40 days.

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

Arugula does best when direct sown outdoors. In Coalmont, sow directly around Tuesday, April 7, 2026.

📚 More Arugula Planting Guides

🗺️

Arugula in Colorado

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 4b Arugula Guide

All cities in your zone · Avg dates

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Other Plants for Coalmont

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Growing Arugula in Zone 4b

Arugula (Eruca vesicaria subsp. sativa) is a popular garden vegetable. In Coalmont, Colorado, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, April 7, 2026.

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