When to plant in Wilmington Island, GA
USDA Zone 9aWilmington Island, Georgia frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Wilmington Island 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. Heads up: the nearest complete-normals station is about 26 km from Wilmington Island, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. In zone 9a, frost is a minor factor for Wilmington Island — most perennials thrive, and annual vegetables can go out early and stay late.
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 Wilmington Island’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 Wilmington Island, drawn to the day from the local frost dates. The dashed line is today.
Wilmington Island planting FAQ
When is the last spring frost in Wilmington Island, GA?
On average, the last spring frost in Wilmington Island is around March 2 (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 Wilmington Island, GA?
The first fall frost in Wilmington Island typically arrives around November 30 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Wilmington Island in?
Wilmington Island is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Wilmington Island?
Wilmington Island has about 273 frost-free days — a long growing season — between the average last spring frost (March 2) and first fall frost (November 30).
When should I plant tomatoes in Wilmington Island?
For Wilmington Island, sow tomatoes indoors about January 5–January 19 and move the seedlings out around March 9, after the last spring frost.
Never miss a window in Wilmington Island
An email when it’s time to start seeds, transplant, and sow — timed to Wilmington Island’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Savannah · 21 km
- Garden City · 21 km
- Georgetown · 24 km
- Bluffton · 24 km
- Pooler · 29 km
- Port Wentworth · 30 km
- Hilton Head Island · 31 km
- Hardeeville · 33 km
Frost dates recorded at SAVANNAH INTL AP, 26 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 Wilmington Island, GA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00003822. Retrieved from https://blissgarden.com/georgia/wilmington-island.