When to plant in Hattiesburg, MS
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Hattiesburg, Mississippi — is derived from the closest NOAA station with complete climate normals.
Hattiesburg enjoys a long ~261-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. In zone 8b, Hattiesburg supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
HATTIESBURG 5SW · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Hattiesburg’s own odds, recorded at HATTIESBURG 5SW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 12 | Mar 23 | Mar 2 | Oct 27 | Nov 11 | Nov 29 |
| 32°F | Mar 26 | Mar 7 | Feb 14 | Nov 5 | Nov 23 | Dec 14 |
| 28°F | Mar 16 | Feb 20 | Jan 26 | Nov 14 | Dec 4 | Jan 6 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Hattiesburg, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 39 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Hattiesburg planting FAQ
When is the last spring frost in Hattiesburg, MS?
On average, the last spring frost in Hattiesburg is around March 7 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Hattiesburg, MS?
The first fall frost in Hattiesburg typically arrives around November 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Hattiesburg in?
Hattiesburg is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Hattiesburg?
Hattiesburg has about 261 frost-free days — a long growing season — between the average last spring frost (March 7) and first fall frost (November 23).
When should I plant tomatoes in Hattiesburg?
For Hattiesburg, sow tomatoes indoors about January 10–January 24 and move the seedlings out around March 14, after the last spring frost.
Never miss a window in Hattiesburg
An email when it’s time to start seeds, transplant, and sow — timed to Hattiesburg’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Petal · 9 km
- Laurel · 46 km
- Bogalusa · 79 km
- Picayune · 93 km
- Gulfport · 102 km
- D'Iberville · 104 km
- Biloxi · 104 km
- Long Beach · 107 km
Frost dates recorded at HATTIESBURG 5SW, 6 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Hattiesburg, MS — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00223887. Retrieved from https://blissgarden.com/mississippi/hattiesburg.