When to plant in Port Wentworth, GA
USDA Zone 9aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Port Wentworth, Georgia — all computed from Port Wentworth's nearest NOAA weather station.
Port Wentworth enjoys a long ~273-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9a is warm enough that Port Wentworth can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
SAVANNAH INTL AP · 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 Port Wentworth’s own odds, recorded at SAVANNAH INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 6 | Mar 19 | Feb 26 | Nov 1 | Nov 16 | Dec 4 |
| 32°F | Mar 25 | Mar 2 | Feb 4 | Nov 11 | Nov 30 | Dec 28 |
| 28°F | Mar 13 | Feb 13 | Jan 15 | Nov 24 | Dec 22 | Jan 17 |
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 Port Wentworth, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
2 within 49 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.
Port Wentworth planting FAQ
When is the last spring frost in Port Wentworth, GA?
Port Wentworth's average last spring frost falls near March 2 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Port Wentworth, GA?
In Port Wentworth, the first 32°F freeze of fall lands around November 30 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Port Wentworth in?
Port Wentworth is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Port Wentworth?
There are roughly 273 frost-free days in Port Wentworth (a long growing season), running from the average last frost around March 2 to the first fall frost near November 30.
When should I plant tomatoes in Port Wentworth?
In Port Wentworth, start tomato seeds indoors around January 5–January 19, then transplant seedlings outdoors around March 9 once the danger of frost has passed.
Never miss a window in Port Wentworth
An email when it’s time to start seeds, transplant, and sow — timed to Port Wentworth’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Pooler · 11 km
- Rincon · 12 km
- Garden City · 12 km
- Hardeeville · 19 km
- Savannah · 20 km
- Georgetown · 23 km
- Bluffton · 26 km
- Wilmington Island · 30 km
Frost dates recorded at SAVANNAH INTL AP, 7 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 Port Wentworth, GA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00003822. Retrieved from https://blissgarden.com/georgia/port-wentworth.