State growing guide
Connecticut Planting Guide
USDA Zone 6b/7a · Last frost Apr 10 · First frost Oct 28 · 201 days
Zone-specific planting calendar, major city frost dates, top crops, and Duke's tips for growing food in Connecticut.
Frost Dates by City — Connecticut
Average frost dates for major Connecticut cities. Use these to calculate your indoor start dates and transplant windows.
| City | USDA Zone | Last Spring Frost | First Fall Frost | Tomato Transplant Window |
|---|---|---|---|---|
| Hartford | 6b | Apr 15 | Oct 25 | ~2 wks after (Apr 15) |
| Bridgeport | 7a | Apr 1 | Nov 1 | ~2 wks after (Apr 1) |
| New Haven | 7a | Apr 1 | Nov 1 | ~2 wks after (Apr 1) |
| Stamford | 7a | Apr 1 | Nov 5 | ~2 wks after (Apr 1) |
Average dates based on 30-year NOAA climate normals. Individual years may vary ±2 weeks. Use the Zone Lookup Tool for ZIP-specific dates.
Duke's Top Tips for Connecticut Gardeners
- Start tomatoes indoors mid-March, transplant after May 15 in Hartford
- Coastal towns like Stamford and Bridgeport can transplant 2 weeks earlier
- Plant peas and lettuce in early April — they tolerate light frost
- Fall garden is excellent: plant kale, beets, and carrots in August
Common Challenges in Connecticut
- ⚠ Heavy clay soil in river valleys — improve with compost and raised beds
- ⚠ Late blight (Phytophthora) hits tomatoes in humid summers — spray copper preventatively
- ⚠ Deer and groundhogs are relentless — wire caging is necessary
Best Crops for Connecticut
Get exact dates for your ZIP code in Connecticut
City averages are a starting point. Your actual microclimate matters — enter your ZIP for precise frost dates.
Frequently Asked Questions — Connecticut Gardening
What zone is Connecticut?
Connecticut spans Zones 6a (inland northwest) to 7a (coastal areas). Hartford is Zone 6b, and coastal cities like Bridgeport and Stamford are Zone 7a.
When to plant tomatoes in Connecticut?
Start seeds indoors mid-March. Transplant outside after Memorial Day (late May) in most of Connecticut. Coastal Zone 7a areas can transplant mid-May with protection.