When to Plant Fennel in Lanesboro, Minnesota (55949)
Location
Lanesboro, Minnesota
ZIP Code
55949
USDA Zone
4b
Last Frost
Tuesday, May 5, 2026
📅 Planting Calendar
Start Seeds Indoors Tuesday, April 7, 2026
Transplant Outdoors Tuesday, April 21, 2026
Pro Tip: Start Fennel seeds indoors 4 weeks before your last frost date for best results.
🌿 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
🤝 Good Companions
Dill
Other Plants for Lanesboro
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Growing Fennel in Zone 4b
Fennel (Foeniculum vulgare) is a popular garden vegetable. In Lanesboro, Minnesota, which is in USDA Hardiness Zone 4b, you should start seeds indoors around Tuesday, April 7, 2026.
Your average last frost date is Tuesday, May 5, 2026. Plan to transplant your Fennel seedlings outdoors around Tuesday, April 21, 2026, about -2 weeks after your last frost date.