When to Plant Fennel in Lothair, Montana (59461)

Location

Lothair, Montana

ZIP Code

59461

USDA Zone

Last Frost

Friday, May 15, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, April 17, 2026

Transplant Outdoors Friday, May 1, 2026

Pro Tip: Start Fennel seeds indoors 4 weeks before your last frost date, then transplant outdoors around Friday, May 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 Lothair?

Get your seeds now so they're ready by Friday, April 17, 2026.

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🤝 Good Companions

Dill

Other Plants for Lothair

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Growing Fennel in Zone 4a

Fennel (Foeniculum vulgare) is a popular garden vegetable. In Lothair, Montana, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, April 17, 2026.

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