Cranston, RI Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Cranston, Rhode Island.
Gardening in Cranston
Providence's largest suburb has the space and the Narragansett Bay moderation to support productive home food growing.
Zone 6b with 195 frost-free days. Bay moderation keeps conditions mild. Rhode Island's compact size means gardeners are always close to both urban resources and agricultural communities.
Cranston's Italian heritage includes productive kitchen garden traditions that have fed families for generations.
What This Means for Cranston Gardeners
The average last spring frost in Cranston is around April 10, and the average first fall frost arrives around October 22. That gives you approximately 195 frost-free days to work with.
A solid, workable season. Most standard vegetable varieties have enough time to mature, though the longest-season crops (like sweet potatoes at 90+ days or large watermelons at 85+ days) need to be started early and chosen carefully. Indoor seed starting isn't optional — it's how you buy the extra weeks that make the difference between a good harvest and a great one.
These dates are based on NOAA 30-year Climate Normal data for the Cranston area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Cranston
Cranston's 195-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Rhode Island planting guide for all 40 plants: Rhode Island Planting Calendar. Or enter your zip code for exact planting dates personalized to Cranston.
More About Zone 6B
Cranston is in USDA Hardiness Zone 6B, which means average annual extreme minimum temperatures between -5°F to 0°F. View the full Zone 6B planting guide.
See the complete planting calendar for Rhode Island: Rhode Island Planting Calendar.
Other Cities in Rhode Island
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Cranston area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Cranston (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (April 10) to maximize your 195-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.