When to Plant Dahlias in Connecticut
In a typical Connecticut location, plant outdoors Apr 25 – May 9. Across the state, the outdoor planting window starts as early as Apr 12 in Bridgeport and as late as May 15 in Torrington.
Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.
Dahlias Planting Dates by City
| City | Plant outdoors |
|---|---|
| Bridgeport | Apr 12 – Apr 26 |
| New Haven | Apr 24 – May 8 |
| Stamford | Apr 24 – May 8 |
| North Stamford | Apr 24 – May 8 |
| Hartford | Apr 24 – May 8 |
| Waterbury | May 3 – May 17 |
| Norwalk | Apr 24 – May 8 |
| Danbury | Apr 27 – May 11 |
| East Norwalk | Apr 24 – May 8 |
| New Britain | Apr 24 – May 8 |
| West Hartford | Apr 24 – May 8 |
| Bristol | May 2 – May 16 |
| Meriden | May 3 – May 17 |
| Hamden | Apr 25 – May 9 |
| Fairfield | Apr 12 – Apr 26 |
| West Haven | Apr 24 – May 8 |
| Milford | Apr 12 – Apr 26 |
| Stratford | Apr 12 – Apr 26 |
| City of Milford (balance) | Apr 12 – Apr 26 |
| East Hartford | Apr 24 – May 8 |
| Middletown | May 3 – May 17 |
| Enfield | Apr 28 – May 12 |
| Southington | May 3 – May 17 |
| Shelton | May 2 – May 16 |
| Norwich | Apr 21 – May 5 |
| Trumbull | Apr 12 – Apr 26 |
| West Torrington | May 15 – May 29 |
| Torrington | May 15 – May 29 |
| Glastonbury | Apr 24 – May 8 |
| Naugatuck | Apr 25 – May 9 |
Showing the 30 most populous of 86 Connecticut cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Connecticut cities.
Frequently Asked Questions
When should I plant dahlias in Connecticut?
In a typical Connecticut location, plant outdoors Apr 25 – May 9. Across the state, the outdoor planting window starts as early as Apr 12 in Bridgeport and as late as May 15 in Torrington.
When is the last frost in Connecticut?
The average last spring frost in Connecticut ranges from April 5 in Bridgeport to May 8 in Torrington, based on NOAA 1991–2020 climate normals.
How long do dahlias take to grow?
Dahlias typically take 90–120 days from planting to harvest. Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.
Other Crops in Connecticut
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Winter Squash
- Pumpkins
- Watermelon
- Cantaloupe
- Corn
- Green Beans
- Peas
- Lettuce
- Spinach
- Kale
- Arugula
- Swiss Chard
- Broccoli
- Cauliflower
- Cabbage
- Brussels Sprouts
- Carrots
- Beets
- Radishes
- Turnips
- Onions
- Garlic
- Potatoes
- Sweet Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
When to plant dahlias in other states