When to Plant Turnip in Biwabik, Minnesota (55708)

Location

Biwabik, Minnesota

ZIP Code

55708

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Wednesday, April 8, 2026

Based on last frost Wednesday, May 20, 2026 · Zone 3b

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 Biwabik?

Get your seeds now so they're ready by Wednesday, April 8, 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 Biwabik, Minnesota? +

In Biwabik (Zone 3b), direct sow Turnip outdoors around Wednesday, April 8, 2026.

What is the last frost date for Biwabik, Minnesota? +

The average last spring frost date for Biwabik, Minnesota (ZIP 55708) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Turnip take to grow? +

Turnip typically matures in about 91 days from direct sowing. In Biwabik, that means you can expect harvest around Wednesday, April 8, 2026 plus 91 days.

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

Turnip does best when direct sown outdoors. In Biwabik, sow directly around Wednesday, April 8, 2026.

📚 More Turnip Planting Guides

🗺️

Turnip in Minnesota

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 3b Turnip Guide

All cities in your zone · Avg dates

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Growing Turnip in Zone 3b

Turnip (Brassica rapa) is a popular garden vegetable. In Biwabik, Minnesota, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, April 8, 2026.

Your average last frost date is Wednesday, May 20, 2026. Turnip grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.