When to Plant Basil in Kentucky
The king of herbs. Basil and tomatoes are best friends in the garden and in the kitchen.
The Short Answer
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 |
Basil Planting Schedule for Kentucky
Northern Kentucky (Zones 6a, 6b)
Average last frost: Apr 15 - May 1 · Average first frost: Oct 5 - Oct 20
Central Kentucky (Zones 6b)
Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 10 - Oct 25
Western Kentucky (Zones 6b, 7a)
Average last frost: Apr 5 - Apr 20 · Average first frost: Oct 15 - Nov 1
Growing Basil in Kentucky
Basil in Kentucky's Climate
Your summer warmth grows excellent basil from transplant through first frost. Start indoors 6 weeks before last frost or buy transplants. Basil peaks in July-August when heat intensifies the essential oils. Succession plant or pinch flowers to keep production going. Plant near tomatoes — the classic companion pairing that works in the kitchen as well as the garden.
Soil Considerations for Kentucky
Clay soils over limestone bedrock. Naturally alkaline. Good for many vegetables with amendment. Excellent for root crops in some areas. Make sure soil has warmed to at least 60°F before planting basil outside.
Kentucky Climate & Growing Season
Mild, four-season climate. Adequate rainfall. Hot, humid summers. Good growing season. Basil cannot tolerate any frost, so wait until all frost danger has passed before transplanting outside. Watch local forecasts carefully in spring.
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 basil — transplant timing shifts by several weeks across the state.
Growing Tips
Pinch off flower buds to keep leaves producing. Harvest from the top down, cutting just above a leaf pair. Succession plant for season-long supply.
Companion Planting
Plant basil alongside these companions for better growth:
Keep basil away from:
The Bottom Line
Last reviewed: March 29, 2026