When to plant cucumbers in South Carolina
South Carolina’s average last spring frost is March 25, and the first fall frost typically arrives around November 5 — about 225 frost-free days (USDA zones 7a, 7b, 8a, 8b, 9a). Cucumber needs 50–70 days to mature, which fits comfortably within South Carolina's growing season.
When to plant cucumbers in South Carolina: the short answer
For a spring planting, plant out Apr 1 – Apr 18, with seeds started indoors Feb 25 – Mar 11. Wait until the soil is at least 60°F and frost is over.
Succession sow again in South Carolina: Apr 29 · May 20 · Jun 10 · Jul 1 · Jul 22 · Aug 12 · Sep 2
Windows are ~1–2 week bands around each date. Frost dates are a statewide average from NOAA/NCEI normals; your town may differ by two weeks or more. Calendar year 2026.
How to grow cucumbers in South Carolina, step by step
- Start seeds indoors (Feb 25 – Mar 11). Sow seeds 1 inch deep in seed-starting mix under bright light. They take 3-10 days to sprout, fastest in soil around 85°F. Harden seedlings off for a week before they go outside.
- Prepare the bed. They need at least six to eight hours of direct sun a day and loose soil at least 14 inches deep, with a pH between 5.5 and 7.0. Dig in compost before planting.
- Plant out (Apr 1 – Apr 18). Space plants about 12 inches apart in rows 48 inches apart. It is killed by frost, so nothing goes outside until the danger has passed.
- Water and feed. It needs plenty of water; keep the soil evenly moist and never let it dry out.
- Watch for pests and problems. Pests: striped cucumber beetle, squash bug, aphids, spider mite. Diseases and disorders: powdery mildew, downy mildew, bacterial wilt, angular leaf spot.
- Harvest (from about May 28 – Jun 17). Cucumber takes 50-70 days to reach harvest. Resents root disturbance - if starting indoors use peat/paper pots. Trellising doubles the plants per square foot and cuts disease. A second sowing in midsummer beats early beetle pressure.
Figures come from our crop data; dates use South Carolina’s average frost dates. More in the full cucumber growing guide.
Cucumber planting dates by USDA zone in South Carolina
South Carolina spans USDA zones 7a, 7b, 8a, 8b, 9a. Colder zones, usually higher or further inland, have a later last spring frost and an earlier first fall frost than the state average, so the cucumber dates shift with them.
When to plant cucumbers in nearby states
| State | Last frost | Plant out |
|---|---|---|
| South Carolina (this page) | March 25 | Apr 1 – Apr 18 |
| North Carolina | April 5 | Apr 12 – Apr 29 |
| Georgia | March 25 | Apr 1 – Apr 18 |
| Tennessee | April 10 | Apr 17 – May 4 |
| Kentucky | April 18 | Apr 25 – May 12 |
Questions gardeners in South Carolina ask
When is the best time to plant cucumbers in South Carolina?
Plant cucumber transplants outdoors in South Carolina between April 1 and April 18. That timing is set by South Carolina's average last spring frost of March 25.
When should I start cucumber seeds indoors in South Carolina?
Start seeds indoors between February 25 and March 11, about 3 weeks before the last frost, so the seedlings are ready to plant out from April 1.
Can I plant cucumbers in the fall in South Carolina?
Yes. For a fall crop, sow between August 3 and August 20, so the crop matures in cool weather before South Carolina's first frost around November 5.
When will cucumbers planted in South Carolina be ready to harvest?
Planted on time, cucumbers are usually ready from about May 28 to June 17, 50-70 days after planting.
When is the last frost in South Carolina?
On average around March 25, with the first fall frost around November 5 - about 225 frost-free days. Your town may differ by two weeks or more.