Hattiesburg, MS planting zone & frost dates
Hattiesburg is in USDA hardiness zone 8b. The last spring frost usually comes around March 8 and the first fall frost around November 15, for a growing season of about 252 days.
Planting calendar for Hattiesburg
Dates are counted from the average last spring frost (March 8) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Jan 11 – Jan 25 Transplant outdoors: Mar 15 – Mar 22 |
| Peppers | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Eggplant | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Broccoli | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Cabbage | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Onions (sets) | Plant outdoors: Feb 8 – Feb 22 |
| Peas | Sow outdoors: Jan 25 – Feb 8 |
| Spinach | Sow outdoors: Jan 25 – Feb 8 |
| Lettuce | Sow outdoors: Feb 8 – Feb 22 |
| Carrots | Sow outdoors: Feb 8 – Feb 22 |
| Potatoes | Plant outdoors: Feb 8 – Feb 22 |
| Beans | Sow outdoors: Mar 15 – Mar 22 |
| Sweet corn | Sow outdoors: Mar 15 – Mar 22 |
| Cucumbers | Sow outdoors: Mar 15 – Mar 22 |
| Squash & zucchini | Sow outdoors: Mar 15 – Mar 22 |
| Basil | Start seeds indoors: Jan 25 – Feb 8 Transplant outdoors: Mar 15 – Mar 22 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 20 (8 weeks before the average first fall frost on Nov 15).
Useful for zone 8b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Feb 16 | Mar 8 | Mar 28 |
| First 32°F frost in fall is before | Dec 4 | Nov 15 | Nov 1 |
How to read it: in spring there is a 10% chance of a frost after March 28, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 1. A hard freeze (28°F) usually ends around February 22.
Hardiness zone by ZIP code in Hattiesburg
- 39401 zone 8b
- 39402 zone 8b
- 39403 zone 8b
- 39404 zone 8b
- 39406 zone 8b
- 39407 zone 8b
Nearby cities
- Petal zone 8b, last frost Mar 8
- Laurel zone 8b, last frost Mar 12
- Carriere zone 9a, last frost Mar 9
- Picayune zone 9a, last frost Mar 9
- West Gulfport zone 9a, last frost Feb 23
- Gulfport zone 9a, last frost Feb 18
- D'Iberville zone 9a, last frost Feb 12
- Long Beach zone 9a, last frost Feb 18
Questions
What growing zone is Hattiesburg, MS?
Hattiesburg is in USDA Plant Hardiness Zone 8b (average extreme winter low 15°F to 20°F), according to the USDA 2023 map.
When is the last frost in Hattiesburg?
The average last spring frost (32°F) in Hattiesburg is March 8. There is still a 10% chance of frost until March 28.
When can I plant tomatoes in Hattiesburg?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 15 – Mar 22. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hattiesburg Chain Muni Ap, MS (USW00013833), 6.1 km (3.8 mi) from the city center, elevation 46 m, based on 21 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.