Brownsville, TX Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Brownsville, Texas.
Gardening in Brownsville
The southernmost city in Texas has near-tropical conditions that grow citrus, tropical fruit, and vegetables year-round.
Zone 10a with 339 frost-free days. The Rio Grande Delta's fertile alluvial soil and warm climate support year-round production. Palm trees aren't ornamental — they're native.
The Rio Grande Valley's citrus heritage extends to Brownsville's residential citrus trees. The proximity to Mexico enriches the food garden culture with cross-border traditions.
What This Means for Brownsville Gardeners
The average last spring frost in Brownsville is around January 15, and the average first fall frost arrives around December 20. That gives you approximately 339 frost-free days to work with.
Brownsville'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 Brownsville 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 Brownsville
With 339 frost-free days, Brownsville 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 Brownsville.
More About Zone 10A
Brownsville is in USDA Hardiness Zone 10A, which means average annual extreme minimum temperatures between 30°F to 35°F. View the full Zone 10A 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 Brownsville 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 Brownsville (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 20 through January 15 — 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.