McAllen, TX Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for McAllen, Texas.
Gardening in McAllen
The Rio Grande Valley's agricultural power extends to backyard gardens that produce food nearly year-round in this subtropical paradise. McAllen's proximity to the Mexican border enriches the food garden culture with traditions from both sides of the river.
Zone 9b with 324 frost-free days — one of the longest growing seasons in the continental US. The Valley's fertile delta soil grows citrus, vegetables, and tropical fruits that most of Texas can't support. Winter is your prime growing season for traditional vegetables; summer is for heat lovers and tropicals.
The Valley's citrus heritage is famous — Ruby Red grapefruit originated here. McAllen's binational food culture means backyard gardens grow Mexican herbs, chiles, and vegetables alongside American garden standards. The market scene at La Placita connects Valley food traditions.
What This Means for McAllen Gardeners
The average last spring frost in McAllen is around January 25, and the average first fall frost arrives around December 15. That gives you approximately 324 frost-free days to work with.
McAllen's growing season is essentially year-round. Frost is a rare event, not a seasonal boundary. Traditional cool-season crops grow through your mild winter, while tropical and subtropical plants thrive permanently outdoors. Your challenge isn't length of season — it's managing summer heat and humidity. Plant warm-season vegetables from September through February and shift to heat-tolerant crops for the summer months.
These dates are based on NOAA 30-year Climate Normal data for the McAllen 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 McAllen
With 324 frost-free days, McAllen can grow nearly anything — including tropical and subtropical plants that most of the country can only dream about. Your prime vegetable season runs from fall through spring; summer is for heat-lovers like okra, sweet potatoes, and peppers. Recommended starting points: cherry tomatoes, jalapeños, okra, sweet potatoes, basil, collard greens, tomatillos, and lemongrass.
See the full Texas planting guide for all 40 plants: Texas Planting Calendar. Or enter your zip code for exact planting dates personalized to McAllen.
More About Zone 9B
McAllen is in USDA Hardiness Zone 9B, which means average annual extreme minimum temperatures between 25°F to 30°F. View the full Zone 9B planting guide.
See the complete planting calendar for Texas: Texas Planting Calendar.
Other Cities in Texas
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the McAllen 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 McAllen (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
You can plant cool-season crops (lettuce, kale, broccoli) from December 15 through January 25 — your cool season is your primary vegetable season. Warm-season crops like tomatoes and peppers go out in early spring. Tropical plants grow year-round. Enter your zip code for exact dates for every plant.