When to Plant Broccoli Raab 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 Broccoli Raab directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Brassica rapa subsp. rapa

Days to Maturity 60 days

Mature Height 12-24"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Broccoli Raab in Colorado Springs?

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

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🤝 Good Companions

OnionBeetCelery

⚠️ Avoid Planting Near

TomatoPepperStrawberry

🤝

Full Companion Planting Guide for Broccoli Raab

See which plants help Broccoli Raab 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

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow plants to flower fully and seed pods to turn tan and dry.

Processing

Thresh dried stalks, winnow to separate seeds from pod fragments.

Seed Viability

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

Pro Tip

Brassica rapa — crosses with turnip, bok choy, and napa cabbage. Isolate by 300 feet.

🪴

Raised Bed Planting Guides

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

Frequently Asked Questions

When should I plant Broccoli Raab in Colorado Springs, Colorado? +

In Colorado Springs (Zone 5b), direct sow Broccoli Raab 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 Broccoli Raab take to grow? +

Broccoli Raab typically matures in about 60 days from direct sowing. In Colorado Springs, that means you can expect harvest around Saturday, March 14, 2026 plus 60 days.

Should I start Broccoli Raab indoors or direct sow in Colorado? +

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

📚 More Broccoli Raab Planting Guides

🗺️

Broccoli Raab in Colorado

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5b Broccoli Raab Guide

All cities in your zone · Avg dates

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Other Plants for Colorado Springs

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Growing Broccoli Raab in Zone 5b

Broccoli Raab (Brassica rapa subsp. rapa) 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. Broccoli Raab grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.