When to plant in Roswell, GA
USDA Zone 8aEverything below — frost dates, hardiness zone, and what to plant when in Roswell, Georgia — is derived from the closest NOAA station with complete climate normals.
Heads up: the nearest complete-normals station is about 19 km from Roswell, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. Zone 8a means many perennials and even some tender shrubs overwinter in Roswell, while your frost dates still decide when annuals go out.
Frost probability
ATLANTA PEACHTREE 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 Roswell’s own odds, recorded at ATLANTA PEACHTREE AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Apr 7 | Mar 21 | Oct 17 | Oct 29 | Nov 12 |
| 32°F | Apr 12 | Mar 25 | Mar 5 | Oct 26 | Nov 9 | Nov 27 |
| 28°F | Mar 31 | Mar 12 | Feb 18 | Nov 4 | Nov 22 | Dec 14 |
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 Roswell, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 29 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.
Roswell planting FAQ
When is the last spring frost in Roswell, GA?
Plan for the last spring frost in Roswell around March 25 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Roswell, GA?
Expect Roswell's first fall frost near November 9 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Roswell in?
Roswell is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Roswell?
There are roughly 229 frost-free days in Roswell (a long growing season), running from the average last frost around March 25 to the first fall frost near November 9.
When should I plant tomatoes in Roswell?
In Roswell, start tomato seeds indoors around January 28–February 11, then transplant seedlings outdoors around April 1 once the danger of frost has passed.
Never miss a window in Roswell
An email when it’s time to start seeds, transplant, and sow — timed to Roswell’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Alpharetta · 8 km
- Dunwoody · 11 km
- Sandy Springs · 12 km
- Milton · 12 km
- Peachtree Corners · 14 km
- Johns Creek · 14 km
- Doraville · 16 km
- Woodstock · 17 km
Frost dates recorded at ATLANTA PEACHTREE AP, 19 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 Roswell, GA — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053863. Retrieved from https://blissgarden.com/georgia/roswell.