Frost dates · USDA zone 9a
Frost dates for Mobile, AL
Mobile, AL sees its last 32 °F night of spring around February 21 and its first of fall around December 6 — a 292-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 | Jan 25 | Jan 5 (next year) |
| Median — 1 year in 2 | Feb 21 | Dec 6 |
| 1 year in 10 | Mar 15 | Nov 15 |
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: 292 days median, at least 257 in 9 years of 10, at least 326 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 Feb 2 and first of Dec 30.
Mobile planting calendar, 2027
Every row runs from the median last frost (Feb 21) and median first frost (Dec 6) 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) | Nov 29 | Jan 24 | May 14 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Feb 21 | Mar 23 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Feb 7 | Feb 7 | Mar 24 | 45 from sow |
| Genovese BasilGenovese | Jan 24 | Mar 7 | May 6 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Dec 27 | Feb 28 | May 14 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Dec 13 | Mar 7 | Jun 10 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Dec 27 | Feb 28 | May 14 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Dec 27 | Feb 28 | May 19 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Dec 27 | Feb 28 | May 19 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Feb 7 | Feb 7 | Apr 18 | 70 from sow |
| TomatilloToma Verde | Jan 10 | Feb 28 | May 9 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Jan 10 | Feb 28 | May 14 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Jan 10 | Feb 28 | May 19 | 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 Mobile grow?
Each sauce, scheduled for a Mobile container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Mobile frost questions
When is the last frost in Mobile, AL?
The median last 32 °F freeze at MOBILE DWTN AP, AL is February 21: half of years see a later one. One year in ten, a freeze still comes after March 15; nine years in ten, it comes after January 25. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Mobile, AL?
The median first 32 °F freeze of fall is December 6. One year in ten it arrives before November 15; nine years in ten, before January 5 (next year).
How long is the growing season in Mobile, AL?
292 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 257 days; one year in ten, at least 326 days.
What growing zone is Mobile, AL?
USDA hardiness zone 9a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 36606. 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 Mobile, AL?
Start Roma VF (determinate paste) seeds indoors around Jan 10 and transplant around Feb 28, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Mar 15. First ripe fruit lands around May 14.
When should I plant peppers in Mobile, AL?
Sow jalapeño indoors on a heat mat around Dec 27; transplant no earlier than Feb 28, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around May 14.
Nearby in Alabama
- Montgomerylast frost Mar 4
- Dothanlast frost Mar 1
- Tuscaloosalast frost Mar 18
- Hooverlast frost Mar 19
- Auburnlast frost Mar 13
- Birminghamlast frost Mar 21
All Alabama frost dates → · How frost-date math drives a sowing calendar →