Wilmington, NC Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Wilmington, North Carolina.
Gardening in Wilmington
Port City gardening is coastal Carolina at its most productive — mild winters, long growing season, and the Cape Fear River's fertile bottomland create conditions that support year-round food growing.
Zone 8b with 255 frost-free days — the longest season in North Carolina. The maritime influence keeps winters mild enough for cool-season crops to produce nonstop from October through April. Sandy coastal soil drains fast and needs organic amendment. Hurricane season is the annual respect-the-coast reminder.
Wilmington's Riverfront Farmers Market and the Poplar Grove Plantation connect the city's food-growing heritage to its growing foodie culture. The Airlie Gardens are a horticultural landmark.
What This Means for Wilmington Gardeners
The average last spring frost in Wilmington is around March 5, and the average first fall frost arrives around November 15. That gives you approximately 255 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 Wilmington 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 Wilmington
Wilmington's 255-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 North Carolina planting guide for all 40 plants: North Carolina Planting Calendar. Or enter your zip code for exact planting dates personalized to Wilmington.
More About Zone 8B
Wilmington is in USDA Hardiness Zone 8B, which means average annual extreme minimum temperatures between 15°F to 20°F. View the full Zone 8B planting guide.
See the complete planting calendar for North Carolina: North Carolina Planting Calendar.
Other Cities in North Carolina
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Wilmington 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 Wilmington (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 (March 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.