Frost Dates for Alabaster, AL
In Alabaster, AL, the average last spring frost is around Mar 12 and the average first fall frost around Nov 16, for a growing season of about 248 days. For frost-tender plants, wait until Mar 31, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Alabaster Shelby Co Airport, AL weather station, 3 miles away, elevation 565 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 31 | Nov 1 |
| 20% | Mar 25 | Nov 5 |
| 30% | Mar 20 | Nov 9 |
| 40% | Mar 16 | Nov 12 |
| 50% | Mar 12 | Nov 16 |
| 60% | Mar 8 | Nov 19 |
| 70% | Mar 3 | Nov 23 |
| 80% | Feb 26 | Nov 28 |
| 90% | Feb 20 | Dec 4 |
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 27 | Nov 4 |
| Frost / freeze (32°F) | Mar 12 | Nov 16 |
| Hard freeze (28°F) | Feb 27 | Dec 1 |
Planting calendar for Alabaster
Transplant Mar 19 – Apr 2
Transplant Mar 26 – Apr 9
Transplant Mar 26 – Apr 9
Transplant Mar 19 – Apr 2
Sow or transplant Mar 19 – Apr 2
Sow or transplant Mar 19 – Apr 2
Sow or transplant Mar 26 – Apr 9
Sow or transplant Feb 12 – Feb 26
Fall sowing Sep 21 – Oct 19
Fall sowing Sep 21 – Oct 12
Fall sowing Sep 7 – Sep 21
Sow or transplant Feb 12 – Feb 26
Fall sowing Sep 7 – Oct 5
Transplant Feb 26 – Mar 12
Fall sowing Aug 24 – Sep 7
Transplant Feb 19 – Mar 5
Fall sowing Aug 24 – Sep 7
Fall sowing Aug 24 – Sep 7
Fall sowing Oct 5 – Oct 26
Fall sowing Sep 7 – Sep 21
Plant Feb 12 – Feb 26
Based on the average last frost (Mar 12) and first frost (Nov 16). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.