When to Plant Turnip in Idaho Springs, Colorado (80452)

Location

Idaho Springs, Colorado

ZIP Code

80452

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 Turnip directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Brassica rapa

Days to Maturity 91 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Turnip in Idaho Springs?

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

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🛠️ 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

Biennial — allow roots to overwinter and harvest seed pods in year 2 when dry.

Processing

Thresh dried stalks, winnow seeds from pod fragments.

Seed Viability

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

Pro Tip

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

Frequently Asked Questions

When should I plant Turnip in Idaho Springs, Colorado? +

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

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

The average last spring frost date for Idaho Springs, Colorado (ZIP 80452) is around Saturday, April 25, 2026. This is based on NOAA climate normals for USDA Zone 5b.

How long does Turnip take to grow? +

Turnip typically matures in about 91 days from direct sowing. In Idaho Springs, that means you can expect harvest around Saturday, March 14, 2026 plus 91 days.

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

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

📚 More Turnip Planting Guides

🗺️

Turnip in Colorado

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5b Turnip Guide

All cities in your zone · Avg dates

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Growing Turnip in Zone 5b

Turnip (Brassica rapa) is a popular garden vegetable. In Idaho 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. Turnip grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.