When to Plant Fennel in Greenville, South Carolina (29607)

Location

Greenville, South Carolina

ZIP Code

29607

USDA Zone

Last Frost

Friday, March 20, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Friday, February 20, 2026

Transplant Outdoors

Friday, March 6, 2026

Based on last frost Friday, March 20, 2026 · Zone 8a

Pro tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Friday, March 6, 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 Greenville?

Get your seeds now so they're ready by Friday, February 20, 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 Greenville, South Carolina? +

In Greenville (Zone 8a), start Fennel seeds indoors around Friday, February 20, 2026 and transplant outdoors around Friday, March 6, 2026.

What is the last frost date for Greenville, South Carolina? +

The average last spring frost date for Greenville, South Carolina (ZIP 29607) is around Friday, March 20, 2026. This is based on NOAA climate normals for USDA Zone 8a.

How long does Fennel take to grow? +

Fennel typically matures in about 80 days from transplanting. In Greenville, that means you can expect harvest around Friday, March 6, 2026 plus 80 days.

Should I start Fennel indoors or direct sow in South Carolina? +

Fennel should be started indoors 4 weeks before your last frost date. In Greenville, that means starting around Friday, February 20, 2026.

📚 More Fennel Planting Guides

🗺️

Fennel in South Carolina

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 8a Fennel Guide

All cities in your zone · Avg dates

→

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Growing Fennel in Zone 8a

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Greenville, South Carolina, which is in USDA Hardiness Zone 8a, you should start seeds indoors around Friday, February 20, 2026.

Your average last frost date is Friday, March 20, 2026. Plan to transplant your Fennel seedlings outdoors around Friday, March 6, 2026, about -2 weeks after your last frost date.