Frost Dates for Montgomery, AL
In Montgomery, AL, the average last spring frost is around Mar 4 and the average first fall frost around Nov 18, for a growing season of about 262 days. For frost-tender plants, wait until Mar 23, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Montgomery 6Sw, AL weather station, 7 miles away, elevation 225 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Mar 23 | Nov 1 |
| 20% | Mar 17 | Nov 6 |
| 30% | Mar 13 | Nov 9 |
| 40% | Mar 9 | Nov 14 |
| 50% | Mar 4 | Nov 18 |
| 60% | Feb 28 | Nov 23 |
| 70% | Feb 24 | Nov 29 |
| 80% | Feb 19 | Dec 3 |
| 90% | Feb 9 | Dec 10 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Mar 17 | Nov 6 |
| Frost / freeze (32°F) | Mar 4 | Nov 18 |
| Hard freeze (28°F) | Feb 17 | Dec 4 |
Planting calendar for Montgomery
Transplant Mar 11 – Mar 25
Transplant Mar 18 – Apr 1
Transplant Mar 18 – Apr 1
Transplant Mar 11 – Mar 25
Sow or transplant Mar 11 – Mar 25
Sow or transplant Mar 11 – Mar 25
Sow or transplant Mar 18 – Apr 1
Sow or transplant Feb 4 – Feb 18
Fall sowing Sep 23 – Oct 21
Fall sowing Sep 23 – Oct 14
Fall sowing Sep 9 – Sep 23
Sow or transplant Feb 4 – Feb 18
Fall sowing Sep 9 – Oct 7
Transplant Feb 18 – Mar 4
Fall sowing Aug 26 – Sep 9
Transplant Feb 11 – Feb 25
Fall sowing Aug 26 – Sep 9
Fall sowing Aug 26 – Sep 9
Fall sowing Oct 7 – Oct 28
Fall sowing Sep 9 – Sep 23
Plant Feb 4 – Feb 18
Based on the average last frost (Mar 4) and first frost (Nov 18). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.