Seed-start answer
Radishes is usually direct-sown around Mar 18
In ZIP 40202, radishes is usually direct-sown around Mar 18 instead of started indoors.
Source: louisville-intl frost station, USDA zone 7a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.
This uses ZIP 40202, the Louisville frost station, and the Apr 15 last-frost estimate.
Seed starting schedule
Radishes dates for Louisville, KY
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | March 18, 2026 | Sow seed outside when the crop and soil can handle the window. |