When to plant in Smyrna, GA
USDA Zone 8aEverything below — frost dates, hardiness zone, and what to plant when in Smyrna, Georgia — is derived from the closest NOAA station with complete climate normals.
Zone 8a means many perennials and even some tender shrubs overwinter in Smyrna, while your frost dates still decide when annuals go out.
Frost probability
MABLETON 1 N · 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 Smyrna’s own odds, recorded at MABLETON 1 N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 24 | Apr 8 | Mar 23 | Oct 19 | Oct 30 | Nov 10 |
| 32°F | Apr 12 | Mar 27 | Mar 9 | Oct 27 | Nov 7 | Nov 26 |
| 28°F | Mar 31 | Mar 14 | Feb 21 | Nov 4 | Nov 19 | Dec 9 |
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 Smyrna, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Smyrna planting FAQ
When is the last spring frost in Smyrna, GA?
Plan for the last spring frost in Smyrna around March 27 (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 Smyrna, GA?
Expect Smyrna's first fall frost near November 7 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Smyrna in?
Smyrna is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Smyrna?
There are roughly 225 frost-free days in Smyrna (a long growing season), running from the average last frost around March 27 to the first fall frost near November 7.
When should I plant tomatoes in Smyrna?
In Smyrna, start tomato seeds indoors around January 30–February 13, then transplant seedlings outdoors around April 3 once the danger of frost has passed.
Never miss a window in Smyrna
An email when it’s time to start seeds, transplant, and sow — timed to Smyrna’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Vinings · 4 km
- Mableton · 8 km
- Marietta · 10 km
- Atlanta · 14 km
- Lithia Springs · 15 km
- Powder Springs · 15 km
- Sandy Springs · 16 km
- Brookhaven · 16 km
Frost dates recorded at MABLETON 1 N, 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 Smyrna, GA — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00095404. Retrieved from https://blissgarden.com/georgia/smyrna.