Columbia, South Carolina: planting zone & frost dates
Columbia is in USDA plant hardiness zone 8b, where the average coldest winter night reaches 15 to 20°F (-9.4 to -6.7°C). The typical last spring frost is around Mar 31 and the first fall frost around Nov 9.
Frost dates
| Probability | Last spring frost (32°F) | First fall frost (32°F) |
|---|---|---|
| Safer (10% risk) | Apr 10 | Nov 1 |
| Typical planning date (30% risk) | Mar 31 | Nov 9 |
| Median (50%) | Mar 22 | Nov 15 |
How to read this: after the spring "10% risk" date, a 32°F frost happens in only about 1 year in 10. In fall, the "10% risk" date is the early end — a frost before it happens about 1 year in 10.
Frost data comes from NOAA station SANDHILL RSCH - ELGIN, SC (USC00387666), 6.6 mi (10.6 km) from the city center and 118 ft higher than the city center (+36 m). Record used for the 1991–2020 normals: 23 years.
Why your yard may differ from the station: microclimates.
Hardiness zone across Columbia
All 13 ZIP codes covering Columbia are in zone 8b.
Vegetable planting calendar for Columbia
Dates are counted from the 30%-risk frost dates above (last frost Mar 31, first frost Nov 9). Shift a week later in cold spots or low-lying ground.
| Crop | Start indoors | Transplant / plant out | Direct sow | Fall crop sow/plant |
|---|---|---|---|---|
| Tomato | Feb 3 – Feb 17 | Apr 7 – Apr 21 | — | — |
| Pepper | Jan 20 – Feb 3 | Apr 14 – Apr 28 | — | — |
| Lettuce | Feb 17 – Mar 3 | Mar 17 – Apr 7 | Mar 3 – Apr 14 | Aug 31 – Sep 28 |
| Green Beans | — | — | Apr 7 – May 12 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 7 – May 5 | — |
| Zucchini & Summer Squash | Mar 3 – Mar 10 | Apr 7 – Apr 21 | Apr 7 – Apr 28 | Aug 17 – Aug 31 |
| Cucumber | Mar 3 – Mar 10 | Apr 14 – Apr 21 | Apr 7 – Apr 28 | Aug 17 – Aug 31 |
| Carrot | — | — | Mar 10 – Apr 14 | Aug 17 – Aug 31 |
| Onion | Jan 6 – Jan 20 | Mar 3 – Mar 17 | — | — |
| Potato | — | Mar 3 – Mar 24 | — | — |
| Basil | Feb 17 – Mar 3 | Apr 14 – Apr 28 | Apr 14 – May 5 | — |
| Spinach | — | — | Feb 17 – Mar 17 | Sep 14 – Oct 12 |
| Kale | Feb 3 – Feb 17 | Mar 3 – Mar 24 | Mar 3 – Mar 24 | Aug 31 – Sep 28 |
| Broccoli | Feb 3 – Feb 17 | Mar 17 – Apr 7 | — | Aug 17 – Aug 31 |
| Peas | — | — | Feb 17 – Mar 10 | Aug 31 – Sep 14 |
| Eggplant | Jan 20 – Feb 3 | Apr 14 – Apr 28 | — | — |
| Cabbage | Feb 3 – Feb 17 | Mar 3 – Mar 17 | — | Aug 17 – Aug 31 |
| Radish | — | — | Feb 24 – Apr 14 | Sep 28 – Oct 26 |
| Strawberry | — | Mar 3 – Mar 24 | — | — |
| Beets | — | — | Mar 10 – Apr 21 | Aug 31 – Sep 14 |
Nearby cities in South Carolina
- North Charleston — zone 9a, last frost Mar 15, first frost Nov 19
- Charleston — zone 9a, last frost Feb 17, first frost Dec 20
- Mount Pleasant — zone 9a, last frost Mar 21, first frost Nov 21
More: all South Carolina cities · other zone 8b cities: Dallas, TX, Fort Worth, TX, El Paso, TX, Virginia Beach, VA, Arlington, TX, Plano, TX, Irving, TX, Garland, TX
Columbia gardening questions
When is the last frost in Columbia, SC?
Plan around Mar 31. At NOAA's Sandhill Rsch - Elgin, SC station, 6.6 mi from the city center, there is a 30% chance of a 32°F frost after that date. Half of springs have their last frost by Mar 22, and after Apr 10 the risk drops to about 1 in 10. A hard freeze (28°F) usually ends earlier, around Mar 8. The 90% and 10% dates are 39 days apart, close to the 36-day median for cities on this site.
When should I plant tomatoes in Columbia, SC?
Start seeds indoors Feb 3 – Feb 17 and set transplants outside Apr 7 – Apr 21, once nights stay above 50°F and the soil is near 60°F. That leaves 223 days between the 30% frost dates, enough for most varieties including 80–85-day slicers. More: tomato planting dates by zone.
How long is the growing season in Columbia?
About 239 days without a 32°F frost in a typical (median) year. In 9 years out of 10 the season lasts at least 214 days, and in 1 year in 10 it runs 265 days or more. In fall there is a 10% chance of frost by Nov 1 and a 30% chance by Nov 9. That is the shortest of the 4 South Carolina cities on this site.
When should I plant a fall garden in Columbia?
Count back from the first fall frost (Nov 9): transplant broccoli Aug 17 – Aug 31; sow kale Aug 31 – Sep 28; sow lettuce Aug 31 – Sep 28; sow radishes Sep 28 – Oct 26. Hardy crops keep growing through light frosts; the median 28°F hard freeze here is Nov 30. How the math works: succession and fall planting.
Did Columbia's hardiness zone change on the 2023 map?
Yes. Most of Columbia was zone 8a on the 2012 map and is zone 8b on the 2023 map — half a zone warmer, like about 56% of U.S. ZIP codes. The shift comes from a newer 1991–2020 averaging period plus more weather stations and better mapping; it does not mean last frost comes earlier. Why the 2023 map is warmer.
How does Columbia compare with Charlotte, NC?
Columbia is zone 8b and Charlotte is zone 8a. The typical last spring frost in Columbia (Mar 31) comes about 5 days earlier than in Charlotte, NC (Apr 5), 81 miles away, and the first fall frost is Nov 9 versus Oct 30. Columbia sits about 351 ft lower, which explains part of the gap. The two cities use different NOAA stations.