Frost dates · USDA zone 8a
Frost dates for Marietta, GA
Marietta, GA sees its last 32 °F night of spring around March 27 and its first of fall around November 7 — a 225-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Mar 9 | Nov 26 |
| Median — 1 year in 2 | Mar 27 | Nov 7 |
| 1 year in 10 | Apr 12 | Oct 27 |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 225 days median, at least 205 in 9 years of 10, at least 249 days in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Mar 14 and first of Nov 19.
Marietta planting calendar, 2027
Every row runs from the median last frost (Mar 27) and median first frost (Nov 7) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Jan 2 | Feb 27 | Jun 17 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Mar 27 | Apr 26 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Mar 13 | Mar 13 | Apr 27 | 45 from sow |
| Genovese BasilGenovese | Feb 27 | Apr 10 | Jun 9 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Jan 30 | Apr 3 | Jun 17 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Jan 16 | Apr 10 | Jul 14 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Jan 30 | Apr 3 | Jun 17 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Jan 30 | Apr 3 | Jun 22 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Jan 30 | Apr 3 | Jun 22 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Mar 13 | Mar 13 | May 22 | 70 from sow |
| TomatilloToma Verde | Feb 13 | Apr 3 | Jun 12 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Feb 13 | Apr 3 | Jun 17 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Feb 13 | Apr 3 | Jun 22 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Marietta grow?
Each sauce, scheduled for a Marietta container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Marietta frost questions
When is the last frost in Marietta, GA?
The median last 32 °F freeze at MABLETON 1 N, GA is March 27: half of years see a later one. One year in ten, a freeze still comes after April 12; nine years in ten, it comes after March 9. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Marietta, GA?
The median first 32 °F freeze of fall is November 7. One year in ten it arrives before October 27; nine years in ten, before November 26.
How long is the growing season in Marietta, GA?
225 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 205 days; one year in ten, at least 249 days.
What growing zone is Marietta, GA?
USDA hardiness zone 8a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 30090. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Marietta, GA?
Start Roma VF (determinate paste) seeds indoors around Feb 13 and transplant around Apr 3, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Apr 12. First ripe fruit lands around Jun 17.
When should I plant peppers in Marietta, GA?
Sow jalapeño indoors on a heat mat around Jan 30; transplant no earlier than Apr 3, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Jun 17.
Nearby in Georgia
- Smyrnalast frost Mar 27
- Mabletonlast frost Mar 27
- Sandy Springslast frost Mar 25
- Roswelllast frost Mar 25
- Dunwoodylast frost Mar 25
- Brookhavenlast frost Mar 25
All Georgia frost dates → · How frost-date math drives a sowing calendar →