When to plant in Marietta, GA
USDA Zone 8aMarietta, Georgia frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 8a means many perennials and even some tender shrubs overwinter in Marietta, 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 Marietta’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 Marietta, 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.
Marietta planting FAQ
When is the last spring frost in Marietta, GA?
Plan for the last spring frost in Marietta 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 Marietta, GA?
The first fall frost in Marietta typically arrives around November 7 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Marietta in?
Marietta is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Marietta?
There are roughly 225 frost-free days in Marietta (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 Marietta?
In Marietta, 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 Marietta
An email when it’s time to start seeds, transplant, and sow — timed to Marietta’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Smyrna · 10 km
- Kennesaw · 11 km
- Vinings · 13 km
- Mableton · 16 km
- Powder Springs · 16 km
- Sandy Springs · 16 km
- Woodstock · 17 km
- Acworth · 18 km
Frost dates recorded at MABLETON 1 N, 12 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 Marietta, GA — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00095404. Retrieved from https://blissgarden.com/georgia/marietta.