Cape Cod, MA Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Cape Cod, Massachusetts.
Gardening in Cape Cod
The Cape's maritime climate creates growing conditions unlike anywhere else in Massachusetts — milder, sandier, and more maritime than the mainland.
Zone 7a with 206 frost-free days — among the longest in Massachusetts. The ocean moderation keeps winters mild and summers cool. Sandy, acidic soil grows blueberries and cranberries naturally; vegetables need amendment.
Cape Cod's cranberry bog heritage and the surrounding maritime agriculture define the growing culture. The Chatham and Falmouth farmers markets connect the Cape's seasonal community to local food.
What This Means for Cape Cod Gardeners
The average last spring frost in Cape Cod is around April 5, and the average first fall frost arrives around October 28. That gives you approximately 206 frost-free days to work with.
That's a generous season. You have time for full-size tomatoes, long-season peppers, and even watermelons without the anxiety of racing the frost. Start warm-season seeds indoors 6-8 weeks before your last frost to hit the ground running. Fall planting is your second opportunity — garlic, kale, lettuce, and broccoli all go in 8-10 weeks before your first frost for harvest into late autumn.
These dates are based on NOAA 30-year Climate Normal data for the Cape Cod 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 Cape Cod
Cape Cod's 206-day growing season is generous — long enough for two full growing windows (spring and fall) with warm-season crops between them. You can grow the full range of vegetables, herbs, and flowers with proper timing. Focus on heat-tolerant varieties for midsummer and cool-season crops for extended fall harvests. Recommended starting points: tomatoes, peppers, beans, cucumbers, squash, garlic, kale, and sunflowers.
See the full Massachusetts planting guide for all 40 plants: Massachusetts Planting Calendar. Or enter your zip code for exact planting dates personalized to Cape Cod.
More About Zone 7A
Cape Cod is in USDA Hardiness Zone 7A, which means average annual extreme minimum temperatures between 0°F to 5°F. View the full Zone 7A planting guide.
See the complete planting calendar for Massachusetts: Massachusetts Planting Calendar.
Other Cities in Massachusetts
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Cape Cod 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 Cape Cod (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Cool-season crops go in 3-4 weeks before your last frost (April 5). Warm-season crops wait until 2 weeks after. You have time for a fall round too — plant cool-season crops again in late summer for harvest into autumn. Enter your zip code for exact dates.