Cool-Season Vegetable

When to Plant Cauliflower in Kentucky

The diva of the brassica family. More temperamental than broccoli but worth the extra attention.

The Short Answer

Cauliflower are cold-tolerant and do well in Kentucky's humid climate. Kentucky gardeners can also plant a fall crop. Clay soils over limestone bedrock. Naturally alkaline. Good for many vegetables with amendment....

Kentucky Frost Dates

Your planting dates depend on which part of Kentucky you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern Kentucky 6a, 6b Apr 15 - May 1 Oct 5 - Oct 20
Central Kentucky 6b Apr 10 - Apr 25 Oct 10 - Oct 25
Western Kentucky 6b, 7a Apr 5 - Apr 20 Oct 15 - Nov 1

Cauliflower Planting Schedule for Kentucky

Northern Kentucky (Zones 6a, 6b)

Average last frost: Apr 15 - May 1 · Average first frost: Oct 5 - Oct 20

Start Seeds Indoors
6 wks before frost
Transplant Outside
2 wks before frost
Fall Planting
10 wks before first frost

Central Kentucky (Zones 6b)

Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 10 - Oct 25

Start Seeds Indoors
6 wks before frost
Transplant Outside
2 wks before frost
Fall Planting
10 wks before first frost

Western Kentucky (Zones 6b, 7a)

Average last frost: Apr 5 - Apr 20 · Average first frost: Oct 15 - Nov 1

Start Seeds Indoors
6 wks before frost
Transplant Outside
2 wks before frost
Fall Planting
10 wks before first frost

Growing Cauliflower in Kentucky

Cauliflower in Kentucky's Climate

Fall cauliflower is more reliable than spring in your climate. The consistent cooling trend from September through October gives cauliflower the steady conditions it demands. Spring plantings risk bolting if temperatures spike above 80°F during heading. Start with fall production before attempting spring.

Soil Considerations for Kentucky

Clay soils over limestone bedrock. Naturally alkaline. Good for many vegetables with amendment. Excellent for root crops in some areas.

Kentucky Climate & Growing Season

Mild, four-season climate. Adequate rainfall. Hot, humid summers. Good growing season.

Growing season length varies across Kentucky: Northern Kentucky (6a, 6b) has a last frost around Apr 15 - May 1, while Western Kentucky (6b, 7a) sees frost end around Apr 5 - Apr 20. This difference matters for cauliflower — adjust your planting dates to match your specific region.

Growing Tips

Blanch white varieties by tying outer leaves over the head when it reaches 2 inches. Temperature swings cause buttoning.

Companion Planting

Plant cauliflower alongside these companions for better growth:

Beets Celery Onions

Keep cauliflower away from:

Strawberries Tomatoes

The Bottom Line

Cauliflower can be grown successfully across Kentucky, but your exact planting dates depend on which region you're in. Northern Kentucky gardeners should plan around a Apr 15 - May 1 last frost, while those in Western Kentucky can typically plant earlier. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Cauliflower Growing Guide National planting guide with all states Kentucky Planting Calendar All plants for Kentucky Cauliflower in Alabama Alabama planting dates Cauliflower in Alaska Alaska planting dates Cauliflower in Arizona Arizona planting dates Cauliflower in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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