Fall in zone 8aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 30080 (Smyrna, GA)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Mableton 1 N, GA (5 miles away).
- Average last spring frostMar 2750% chance of a 32°F freeze after this date
- Average first fall frostNov 750% chance of a 32°F freeze by this date
- Growing season (frost-free)225 daysmedian, 32°F threshold
- USDA hardiness zone8a10 to 15°F avg. coldest night
Get The Dial for 30080 (Smyrna)
Frost and freeze alerts from the NWS forecast for 30080, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.
This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
68°F 55°F or warmer
24-hour average · latest 65°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Watkinsville #1 (62 mi).
4-inch depth
69°F 55°F or warmer
24-hour average · latest 67°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Watkinsville #1 (62 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 30080 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 69°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Southeast (warm, humid). Timing only; always follow the product label.
- Centipedegrass (warm-season): Spring: Not before mid-May (NC State); after full green-up (about May 12 here, using green-up about 3–4 weeks after your average last frost); Summer: Optional mid-summer feeding, especially on sandy coastal soils. Avoid: Early-spring feeding, frequent feeding and liming unless a soil test calls for it (centipede decline).
Plant now
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 7: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Mar 9 |
| 50% (the "average" last frost) | Mar 27 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 12 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 27 |
| 50% (the "average" first frost) | Nov 7 |
| 90% (late: most years have frozen by now) | Nov 26 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 8 | Oct 30 |
| 32°F (freeze) | Mar 27 | Nov 7 |
| 28°F (hard freeze) | Mar 14 | Nov 19 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 30080
Dates count from your average last spring frost (Mar 27) and first fall frost (Nov 7). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Jan 30–Feb 13 | Apr 3–17 (transplant) | Jul 11–Aug 8 (transplant) |
| Pepper (sweet and hot) | Jan 16–30 | Apr 10–24 (transplant) | Jul 18–Aug 8 (transplant) |
| Eggplant | Jan 16–30 | Apr 10–24 (transplant) | Jul 18–Aug 8 (transplant) |
| Tomatillo | Jan 30–Feb 13 | Apr 3–17 (transplant) | – |
| Lettuce | Jan 30–Feb 13 | Mar 6–27 (transplant) Feb 27–Apr 10 (sow outdoors) | Sep 12–Oct 3 (transplant) Aug 29–Sep 26 (sowing) |
| Spinach | – | Feb 13–Mar 6 (sow outdoors) | Sep 12–Oct 3 (sowing) |
| Kale | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Aug 15–Sep 12 (transplant) Aug 1–29 (sowing) |
| Collards | Jan 30–Feb 13 | Feb 27–Mar 27 (transplant) Feb 27–Mar 27 (sow outdoors) | Aug 15–Sep 12 (transplant) Aug 1–29 (sowing) |
| Broccoli | Jan 16–30 | Feb 27–Mar 13 (transplant) | Aug 1–29 (transplant) |
| Cabbage | Jan 16–30 | Feb 27–Mar 13 (transplant) | Aug 1–29 (transplant) |
| Cauliflower | Jan 16–30 | Mar 13–27 (transplant) | Aug 1–29 (transplant) |
| Brussels sprouts | Jan 2–16 | Feb 27–Mar 13 (transplant) | Jul 18–Aug 8 (transplant) |
| Kohlrabi | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Bok choy / Asian greens | – | Feb 27–Mar 13 (sow outdoors) | Sep 12–26 (sowing) |
| Arugula | – | Feb 27–Mar 27 (sow outdoors) | Sep 12–Oct 10 (sowing) |
| Mustard greens | – | Feb 27–Mar 20 (sow outdoors) | Sep 12–26 (sowing) |
| Swiss chard | Feb 13–27 | Mar 13–Apr 3 (transplant) Mar 13–Apr 10 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Beet | – | Feb 27–Mar 27 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Carrot | – | Mar 6–Apr 3 (sow outdoors) | Aug 15–29 (sowing) |
| Radish | – | Feb 20–Apr 3 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Turnip | – | Feb 27–Mar 20 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Parsnip | – | Mar 6–27 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 30–Feb 27 (sow outdoors) | Aug 15–29 (sowing) |
| Onion (bulbing) | Jan 2–16 | Feb 13–27 (transplant) | – |
| Green onion / scallion | – | Feb 13–Mar 13 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Leek | Jan 2–16 | Feb 27–Mar 13 (transplant) | – |
| Garlic | – | – | Sep 26–Oct 24 (sowing) |
| Shallot | – | Feb 13–27 (transplant) | Sep 26–Oct 24 (sowing) |
| Potato | – | Feb 27–Mar 13 (transplant) | Jul 18–Aug 1 (transplant) |
| Sweet potato | – | Apr 17–May 1 (transplant) | – |
| Sweet corn | – | Apr 3–17 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 3–17 (sow outdoors) | Aug 15–29 (sowing) |
| Bean, pole | – | Apr 3–17 (sow outdoors) | – |
| Lima bean | – | Apr 10–24 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 17–May 8 (sow outdoors) | – |
| Cucumber | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 15–29 (sowing) |
| Summer squash / zucchini | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 15–29 (sowing) |
| Winter squash | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Pumpkin | – | Apr 3–17 (sow outdoors) | – |
| Watermelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Okra | Feb 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Celery | Jan 2–16 | Apr 3–10 (transplant) | – |
| Basil | Feb 13–27 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Cilantro | – | Mar 13–Apr 10 (sow outdoors) | Sep 12–26 (sowing) |
| Parsley | Jan 16–30 | Mar 13–27 (transplant) Mar 6–27 (sow outdoors) | – |
| Dill | – | Mar 27–Apr 10 (sow outdoors) | Sep 12–26 (sowing) |
| Sunflower | – | Mar 27–Apr 10 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Rhubarb (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Strawberry (plants) | – | Feb 27–Mar 13 (transplant) | Aug 29–Sep 26 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Plants that do well here
Georgia has a university or garden plant program: Georgia Gold Medal Plants (ended 2017). Plant frost-tender annuals after March 27 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Mableton 1 N, GA (NOAA GHCN-Daily ID USC00095404), elevation 980 ft, 4.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Atlanta Fulton Co AP, GA | 7 mi | Mar 24 | Nov 8 |
| Atlanta Peachtree AP, GA | 11 mi | Mar 25 | Nov 9 |
| Dallas 7 NE, GA | 17 mi | Apr 2 | Nov 4 |
The average last-frost dates of these stations span 9 days, a rough guide to local variation. See data sources & methods.
Frost questions for 30080
When is the last frost in 30080?
The average (50% chance) last spring freeze of 32°F for ZIP 30080 is March 27. For a more cautious planting date, use April 12, when only 1 year in 10 still sees a later freeze.
When is the first frost in 30080?
The average first fall freeze is November 7. In 1 year in 10 it comes by October 27.
What hardiness zone is 30080?
ZIP 30080 is in USDA zone 8a (10 to 15°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 30080 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
30339 Vinings 30082 Smyrna 30060 Marietta 30067 Marietta 30327 Atlanta 30126 Mableton 30008 Marietta 30090 Marietta
Other ZIP codes in Cobb County
30008 30060 30062 30064 30066 30067 30068 30082 30090 30101 30106 30111 30126 30127 30144 30152 30168 30339 All Cobb County frost dates · Georgia frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.