When to Plant Fennel in Gilbert, Pennsylvania (18331)
Location
Gilbert, Pennsylvania
ZIP Code
18331
USDA Zone
6b
Last Frost
Wednesday, April 15, 2026
📅 Planting Calendar
Start Seeds Indoors Wednesday, March 18, 2026
Transplant Outdoors Wednesday, April 1, 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 Gilbert
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Growing Fennel in Zone 6b
Fennel (Foeniculum vulgare) is a popular garden vegetable. In Gilbert, Pennsylvania, which is in USDA Hardiness Zone 6b, you should start seeds indoors around Wednesday, March 18, 2026.
Your average last frost date is Wednesday, April 15, 2026. Plan to transplant your Fennel seedlings outdoors around Wednesday, April 1, 2026, about -2 weeks after your last frost date.