When to plant cucumbers in Tennessee
Tennessee’s average last spring frost is April 10, and the first fall frost typically arrives around October 25 — about 198 frost-free days (USDA zones 6a, 6b, 7a, 7b, 8a). Cucumber needs 50–70 days to mature, which fits comfortably within Tennessee's growing season.
When to plant cucumbers in Tennessee: the short answer
For a spring planting, plant out Apr 17 – May 4, with seeds started indoors Mar 13 – Mar 27. Wait until the soil is at least 60°F and frost is over.
Succession sow again in Tennessee: May 15 · Jun 5 · Jun 26 · Jul 17 · Aug 7
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 Tennessee, step by step
- Start seeds indoors (Mar 13 – Mar 27). 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 17 – May 4). 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 Jun 13 – Jul 3). 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 Tennessee’s average frost dates. More in the full cucumber growing guide.
Cucumber planting dates by USDA zone in Tennessee
Tennessee spans USDA zones 6a, 6b, 7a, 7b, 8a. 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 |
|---|---|---|
| Tennessee (this page) | April 10 | Apr 17 – May 4 |
| North Carolina | April 5 | Apr 12 – Apr 29 |
| South Carolina | March 25 | Apr 1 – Apr 18 |
| Georgia | March 25 | Apr 1 – Apr 18 |
| Kentucky | April 18 | Apr 25 – May 12 |
Questions gardeners in Tennessee ask
When is the best time to plant cucumbers in Tennessee?
Plant cucumber transplants outdoors in Tennessee between April 17 and May 4. That timing is set by Tennessee's average last spring frost of April 10.
When should I start cucumber seeds indoors in Tennessee?
Start seeds indoors between March 13 and March 27, about 3 weeks before the last frost, so the seedlings are ready to plant out from April 17.
Can I plant cucumbers in the fall in Tennessee?
Yes. For a fall crop, sow between July 23 and August 9, so the crop matures in cool weather before Tennessee's first frost around October 25.
When will cucumbers planted in Tennessee be ready to harvest?
Planted on time, cucumbers are usually ready from about June 13 to July 3, 50-70 days after planting.
When is the last frost in Tennessee?
On average around April 10, with the first fall frost around October 25 - about 198 frost-free days. Your town may differ by two weeks or more.