Frost Dates for North Charleston, SC
In North Charleston, SC, the average last spring frost is around Mar 7 and the average first fall frost around Nov 27, for a growing season of about 266 days. For frost-tender plants, wait until Mar 27, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Charleston Intl. Airport, SC weather station, 2 miles away, elevation 40 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 27 | Nov 8 |
| 20% | Mar 20 | Nov 13 |
| 30% | Mar 15 | Nov 19 |
| 40% | Mar 11 | Nov 23 |
| 50% | Mar 7 | Nov 27 |
| 60% | Mar 3 | Dec 1 |
| 70% | Feb 27 | Dec 4 |
| 80% | Feb 22 | Dec 11 |
| 90% | Feb 12 | Dec 21 |
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 21 | Nov 13 |
| Frost / freeze (32°F) | Mar 7 | Nov 27 |
| Hard freeze (28°F) | Feb 20 | Dec 15 |
Planting calendar for North Charleston
Transplant Mar 14 – Mar 28
Transplant Mar 21 – Apr 4
Transplant Mar 21 – Apr 4
Transplant Mar 14 – Mar 28
Sow or transplant Mar 14 – Mar 28
Sow or transplant Mar 14 – Mar 28
Sow or transplant Mar 21 – Apr 4
Sow or transplant Feb 7 – Feb 21
Fall sowing Oct 2 – Oct 30
Fall sowing Oct 2 – Oct 23
Fall sowing Sep 18 – Oct 2
Sow or transplant Feb 7 – Feb 21
Fall sowing Sep 18 – Oct 16
Transplant Feb 21 – Mar 7
Fall sowing Sep 4 – Sep 18
Transplant Feb 14 – Feb 28
Fall sowing Sep 4 – Sep 18
Fall sowing Sep 4 – Sep 18
Fall sowing Oct 16 – Nov 6
Fall sowing Sep 18 – Oct 2
Plant Feb 7 – Feb 21
Based on the average last frost (Mar 7) and first frost (Nov 27). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.