When to Plant Fennel in Corning, California (96021)

Location

Corning, California

ZIP Code

96021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Tuesday, January 13, 2026

Transplant Outdoors

Tuesday, January 27, 2026

Based on last frost Tuesday, February 10, 2026 · Zone 9b

Pro tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Tuesday, January 27, 2026.

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🌿 Plant Details

Scientific Name Foeniculum vulgare

Days to Maturity 80 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 7-14 days

Ready to Plant Fennel in Corning?

Get your seeds now so they're ready by Tuesday, January 13, 2026.

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🤝 Good Companions

Dill

🤝

Full Companion Planting Guide for Fennel

See which plants help Fennel thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 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 umbels when seeds turn gray-green to brown — just before they drop.

Processing

Cut seed heads into a bag, dry 1–2 weeks, thresh to separate seeds.

Seed Viability

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

Pro Tip

Fennel cross-pollinates with dill — keep at least 300 feet apart or sacrifice one crop when saving seed.

Frequently Asked Questions

When should I plant Fennel in Corning, California? +

In Corning (Zone 9b), start Fennel seeds indoors around Tuesday, January 13, 2026 and transplant outdoors around Tuesday, January 27, 2026.

What is the last frost date for Corning, California? +

The average last spring frost date for Corning, California (ZIP 96021) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.

How long does Fennel take to grow? +

Fennel typically matures in about 80 days from transplanting. In Corning, that means you can expect harvest around Tuesday, January 27, 2026 plus 80 days.

Should I start Fennel indoors or direct sow in California? +

Fennel should be started indoors 4 weeks before your last frost date. In Corning, that means starting around Tuesday, January 13, 2026.

📚 More Fennel Planting Guides

🗺️

Fennel in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 9b Fennel Guide

All cities in your zone · Avg dates

→

Other Plants for Corning

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Growing Fennel in Zone 9b

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Corning, California, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Tuesday, January 13, 2026.

Your average last frost date is Tuesday, February 10, 2026. Plan to transplant your Fennel seedlings outdoors around Tuesday, January 27, 2026, about -2 weeks after your last frost date.