Oklahoma City, OK Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Oklahoma City, Oklahoma.
Gardening in Oklahoma City
OKC is tornado country, which teaches gardeners the same lesson it teaches everyone else: build, rebuild, and keep going. The city's flat prairie landscape, red clay soil, and extreme weather forge gardeners who are nothing if not resilient.
Oklahoma weather is a personality test. Tornadoes, ice storms, 110°F heat, and sudden spring freezes — sometimes in the same week. Your 212-day growing season sounds generous until you realize that the weather within that window is wildly unpredictable. The red clay soil is iron-rich and productive when amended, but it shrinks when dry and swells when wet, cracking foundations and garden beds alike.
Thunder fans know about explosive energy that arrives without warning — Oklahoma weather is the same way. The Paseo Arts District's community gardens blend artistic expression with food production. OKC's growing refugee community — Vietnamese, Burmese, Central American — has brought food gardening traditions that thrive in the challenging Oklahoma climate, proving that adaptability transcends borders.
What This Means for Oklahoma City Gardeners
The average last spring frost in Oklahoma City is around April 1, and the average first fall frost arrives around October 30. That gives you approximately 212 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 Oklahoma City 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 Oklahoma City
Oklahoma City's 212-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 Oklahoma planting guide for all 40 plants: Oklahoma Planting Calendar. Or enter your zip code for exact planting dates personalized to Oklahoma City.
More About Zone 7A
Oklahoma City 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 Oklahoma: Oklahoma Planting Calendar.
Other Cities in Oklahoma
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Oklahoma City 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 Oklahoma City (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 1). 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.