When to Plant Squash in Kentucky
Published: April 21, 2026
Kentucky gardeners in Zone 6b have a 33-week growing season for squash (March 22 to November 10). The moderate climate supports a full warm-season crop plus an often-productive fall crop. This guide gives exact dates for Kentucky based on your local frost calendar.
Squash Planting Dates for Kentucky
| Start seeds indoors | March 1–8 |
| Last frost (average) | March 22 |
| Transplant outdoors | March 29–April 8 |
| Direct sow outdoors | March 29–April 8 |
| Expect first harvest | May 13 – June 2 |
| Fall crop start | September 1–11 |
| Fall harvest | October 16 |
| First fall frost (average) | November 10 |
Dates above assume Zone 6b, the most common zone in Kentucky. Gardeners in cooler Louisville (Zone 6b) plant 1–2 weeks later; warmer Bowling Green (Zone 7a) can plant 1–2 weeks earlier.
Growing Squash in Kentucky's Climate
Kentucky's moderate Zone 6b climate is well-suited to squash with minimal special accommodation. The standard transplant calendar works as written, and harvest windows line up with what seed packets recommend without adjustment.
Succession planting extends your squash harvest significantly in Kentucky. A second planting 3 to 4 weeks after the first gives you a backup in case of pest pressure and extends the total harvest window into early fall.
Common squash pests to watch for in Kentucky include Squash Vine Borer and Squash Bug. The first line of defense is companion planting: Corn and Bush Beans planted nearby discourage several of these pests by confusing host-plant identification or repelling adults before they can lay eggs. Weekly garden walks in the early morning catch problems when they're still manageable.
Squash Garden Calendar for Kentucky
| Month | Task | Notes |
|---|---|---|
| January | — | Dormant season |
| February | — | Dormant season |
| March | Transplant outdoors | Soil temp must be 65°F+; nighttime lows above 50°F |
| April | — | Dormant season |
| May ← | First harvest window opens | Squash begins producing 45–65 days after transplant |
| June | Peak growth; water 1 inch/week | Monitor for pests daily; stake or support as needed |
| July | Start fall crop seeds | Fall transplants go in 10 weeks before first frost |
| August | — | Dormant season |
| September | Fall crop planting | Transplant or direct sow for fall harvest before frost |
| October | — | Dormant season |
| November | First frost approaches | Harvest remaining squash; cover plants on frost nights |
| December | — | Dormant season |
Squash Growing Tips for Kentucky Gardeners
- •Plant only after soil is fully warm (65°F+) — cold soil rots seeds and creates disease-prone seedlings.
- •Squash vine borer kills plants from the inside in July–August in the eastern US; plant a backup crop in early July.
- •Kentucky's moderate climate supports succession planting — sow new transplants or seeds every 3 weeks during spring to extend the harvest window into fall.
- •Hand-pollinate using a small brush if fruit falls off small — squash need bee visits for fruit set.
Companion Planting for Squash in Kentucky
In Kentucky's moderate climate, planting squash with Corn and Bush Beans helps deter pests and improve soil. Avoid planting near Potato and Fennel, which inhibit squash growth through root chemistry or shared pest pressure. See the full squash companion planting guide for the complete list.
Squash Planting Dates by City in Kentucky
Top cities in Kentucky — select for city-level frost dates and planting calendars.
Frequently Asked Questions
When should I plant squash in Kentucky?
In Kentucky (Zone 6b), start squash seeds indoors around March 1–8 and transplant outdoors around March 29–April 8 — 1 weeks after the state's average last frost of March 22.
What is the last frost date in Kentucky?
Kentucky's average last frost date is March 22 in the state's most common Zone 6b. Frost dates vary by city — higher elevations and northern counties run 1 to 3 weeks later than the state average. See the city list below for city-level frost dates.
Can I grow squash year-round in Kentucky?
Not year-round — Kentucky's cold season stops squash production. The squash season runs March 22 to November 10, roughly 33 weeks. A fall crop extends harvest into late autumn.
What squash varieties grow best in Kentucky?
For Kentucky's Zone 6b, Black Beauty zucchini, Yellow Crookneck, and Pattypan are universal choices.
When do I start squash seeds indoors in Kentucky?
Start squash seeds indoors in Kentucky around March 1–8, which is 3 weeks before the state's average last frost of March 22. Use grow lights and keep soil temperatures at 70–75°F for fastest germination.