When to Plant Fennel in Saint Petersburg, Florida (33708)

Location

Saint Petersburg, Florida

ZIP Code

33708

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Planting Calendar

Start Seeds Indoors Thursday, December 18, 2025

Transplant Outdoors Thursday, January 1, 2026

Pro Tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Thursday, January 1, 2026.

🌿 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 Saint Petersburg?

Get your seeds now so they're ready by Thursday, December 18, 2025.

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🤝 Good Companions

Dill

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Growing Fennel in Zone 10b

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Saint Petersburg, Florida, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Thursday, December 18, 2025.

Your average last frost date is Thursday, January 15, 2026. Plan to transplant your Fennel seedlings outdoors around Thursday, January 1, 2026, about -2 weeks after your last frost date.