Killeen, TX Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Killeen, Texas.
Gardening in Killeen
Fort Cavazos (formerly Hood) makes Killeen one of the most diverse cities in Texas. Military families from everywhere bring global gardening traditions to central Texas.
Zone 8a with 247 frost-free days. The Blackland Prairie's rich clay soil is productive with amendment. Central Texas heat is real but manageable with proper timing.
Military families from Hawaii, Alaska, Germany, and Korea all garden in Killeen's central Texas soil — creating one of the most diverse growing communities in the state.
What This Means for Killeen Gardeners
The average last spring frost in Killeen is around March 10, and the average first fall frost arrives around November 12. That gives you approximately 247 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 Killeen 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 Killeen
Killeen's 247-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 Texas planting guide for all 40 plants: Texas Planting Calendar. Or enter your zip code for exact planting dates personalized to Killeen.
More About Zone 8A
Killeen is in USDA Hardiness Zone 8A, which means average annual extreme minimum temperatures between 10°F to 15°F. View the full Zone 8A 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 Killeen 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 Killeen (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 10). 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.