When to Plant Fennel in Campbell, New York (14821)

Location

Campbell, New York

ZIP Code

14821

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Saturday, March 28, 2026

Transplant Outdoors

Saturday, April 11, 2026

Based on last frost Saturday, April 25, 2026 · Zone 5b

Pro tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Saturday, April 11, 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 Campbell?

Get your seeds now so they're ready by Saturday, March 28, 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 Campbell, New York? +

In Campbell (Zone 5b), start Fennel seeds indoors around Saturday, March 28, 2026 and transplant outdoors around Saturday, April 11, 2026.

What is the last frost date for Campbell, New York? +

The average last spring frost date for Campbell, New York (ZIP 14821) is around Saturday, April 25, 2026. This is based on NOAA climate normals for USDA Zone 5b.

How long does Fennel take to grow? +

Fennel typically matures in about 80 days from transplanting. In Campbell, that means you can expect harvest around Saturday, April 11, 2026 plus 80 days.

Should I start Fennel indoors or direct sow in New York? +

Fennel should be started indoors 4 weeks before your last frost date. In Campbell, that means starting around Saturday, March 28, 2026.

📚 More Fennel Planting Guides

🗺️

Fennel in New York

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 5b Fennel Guide

All cities in your zone · Avg dates

→

Other Plants for Campbell

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Growing Fennel in Zone 5b

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Campbell, New York, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, March 28, 2026.

Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Fennel seedlings outdoors around Saturday, April 11, 2026, about -2 weeks after your last frost date.