Seed-start answer
Radishes is usually direct-sown around Apr 2
In ZIP 43215, radishes is usually direct-sown around Apr 2 instead of started indoors.
Source: columbus-port-columbus frost station, USDA zone 6b, 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 43215, the Columbus frost station, and the Apr 30 last-frost estimate.
Seed starting schedule
Radishes dates for Columbus, OH
| Step | Date | How to use it |
|---|---|---|
| Direct Sow | April 2, 2026 | Sow seed outside when the crop and soil can handle the window. |