When to Plant Dahlias in Rhode Island
In a typical Rhode Island location, plant outdoors Apr 18 – May 2. Across the state, the outdoor planting window starts as early as Apr 14 in Newport and as late as May 8 in Narragansett.
Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.
Dahlias Planting Dates by City
| City | Plant outdoors |
|---|---|
| Providence | Apr 18 – May 2 |
| Warwick | Apr 18 – May 2 |
| Cranston | Apr 18 – May 2 |
| Pawtucket | Apr 29 – May 13 |
| East Providence | Apr 18 – May 2 |
| Woonsocket | Apr 29 – May 13 |
| Coventry | Apr 29 – May 13 |
| Cumberland | Apr 29 – May 13 |
| North Providence | Apr 18 – May 2 |
| South Kingstown | May 8 – May 22 |
| West Warwick | Apr 29 – May 13 |
| Johnston | Apr 18 – May 2 |
| North Kingstown | May 4 – May 18 |
| Newport | Apr 14 – Apr 28 |
| Bristol | Apr 18 – May 2 |
| Smithfield | Apr 29 – May 13 |
| Lincoln | Apr 29 – May 13 |
| Central Falls | Apr 29 – May 13 |
| Westerly | Apr 18 – May 2 |
| Portsmouth | Apr 18 – May 2 |
| Middletown | Apr 18 – May 2 |
| Barrington | Apr 18 – May 2 |
| Narragansett | May 8 – May 22 |
| East Greenwich | Apr 18 – May 2 |
| Newport East | Apr 18 – May 2 |
| Valley Falls | Apr 29 – May 13 |
| Warren | Apr 18 – May 2 |
| North Smithfield | Apr 29 – May 13 |
| North Scituate | May 2 – May 16 |
Showing the 29 most populous of 29 Rhode Island cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Rhode Island cities.
Frequently Asked Questions
When should I plant dahlias in Rhode Island?
In a typical Rhode Island location, plant outdoors Apr 18 – May 2. Across the state, the outdoor planting window starts as early as Apr 14 in Newport and as late as May 8 in Narragansett.
When is the last frost in Rhode Island?
The average last spring frost in Rhode Island ranges from April 7 in Newport to May 1 in Narragansett, 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 Rhode Island
- 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