When to Plant Mustard in Fairbanks, Alaska (99708)

Location

Fairbanks, Alaska

ZIP Code

99708

USDA Zone

Last Frost

Monday, June 1, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Monday, April 20, 2026

Based on last frost Monday, June 1, 2026 · Zone 2a

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 Fairbanks?

Get your seeds now so they're ready by Monday, April 20, 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 Fairbanks, Alaska? +

In Fairbanks (Zone 2a), direct sow Mustard outdoors around Monday, April 20, 2026.

What is the last frost date for Fairbanks, Alaska? +

The average last spring frost date for Fairbanks, Alaska (ZIP 99708) is around Monday, June 1, 2026. This is based on NOAA climate normals for USDA Zone 2a.

How long does Mustard take to grow? +

Mustard typically matures in about 56 days from direct sowing. In Fairbanks, that means you can expect harvest around Monday, April 20, 2026 plus 56 days.

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

Mustard does best when direct sown outdoors. In Fairbanks, sow directly around Monday, April 20, 2026.

📚 More Mustard Planting Guides

🗺️

Mustard in Alaska

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 2a Mustard Guide

All cities in your zone · Avg dates

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Other Plants for Fairbanks

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Growing Mustard in Zone 2a

Mustard (Brassica juncea) is a popular garden vegetable. In Fairbanks, Alaska, which is in USDA Hardiness Zone 2a, you should direct sow seeds around Monday, April 20, 2026.

Your average last frost date is Monday, June 1, 2026. Mustard grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.