Mississippi Frost Dates & Growing Season Guide
Mississippi (MS) spans USDA hardiness zones 7b, 8a, 8b, with growing seasons ranging from 228 days in Tupelo to 284 days in Gulfport. The average growing season across the state is approximately 255 days.
Mississippi City Frost Dates
The table below shows the average last spring frost date, first fall frost date, growing season length, and USDA hardiness zone for each city. Click a city name for detailed planting calendars and zone information.
Planting Windows for Mississippi
Based on average frost dates, here are the recommended planting windows for each city. The indoor seed start date is approximately seven weeks before the last spring frost. Transplanting should occur about two weeks after the last frost. The last direct sow date for fall crops is ten weeks before the first fall frost.
| City | Start Seeds Indoors | Transplant After | Last Direct Sow |
|---|---|---|---|
| Jackson | January 21 | March 24 | September 6 |
| Gulfport | January 2 | March 5 | September 22 |
| Tupelo | February 2 | April 5 | August 27 |
| Hattiesburg | January 16 | March 19 | September 9 |
Gardening in Mississippi
Mississippi's warm climate and long growing season make it a productive state for a wide range of crops. Most of the state falls in zones 7b to 8b, with 228 to 284 frost-free days. The hot, humid summers favor southern staples like okra, field peas, watermelons, and sweet potatoes. Spring planting can begin in late February in the southern counties. The Mississippi Delta region has rich alluvial soils, while other parts of the state have sandy or clay soils requiring amendment. Disease pressure is high in the humidity, making resistant varieties and good cultural practices important. Fall gardening is productive and extends the harvest of greens, root vegetables, and brassicas well into November.
Understanding Mississippi's Hardiness Zones
Mississippi includes USDA hardiness zones 7b, 8a, 8b. These zones indicate the average annual extreme minimum winter temperature for each area, which determines which perennial plants, trees, and shrubs can survive winter without protection. When purchasing trees, shrubs, or perennial flowers, always check that the plant is rated for your hardiness zone or a lower (colder) zone number.
Tips for Using Mississippi Frost Dates
These frost dates represent long-term averages and should be treated as guidelines rather than guarantees. In any given year, the actual last spring frost or first fall frost may arrive one to three weeks earlier or later than the average. Factors that affect your specific location include elevation above the city center, proximity to water, slope direction, and whether you are in an urban or rural area. South-facing slopes and areas near large pavement or building masses tend to be warmer than surrounding open land. Low-lying valleys and exposed hilltops are often colder than mid-slope positions.
To protect against late spring frosts, keep row cover fabric, old bed sheets, or frost blankets on hand. Monitor your local weather forecast daily as the average frost date approaches. When frost is predicted after you have transplanted, covering plants in the late afternoon traps ground heat and can protect against temperatures down to about 28 degrees Fahrenheit. For fall season extension, the same covers protect mature plants from early frosts, often buying several additional weeks of harvest.