🌶️When to Plant Radish (2026)
The fastest crop in the garden. Ready in under a month.
- Type: Cool-season
- Method: Direct sow
- Days to harvest: 28
- Spacing: 2" apart
- Sun: Full sun to part shade
- Companions: carrot, lettuce, spinach
Is Radish right for your USDA zone?
Radish is a cool-season crop, which means it thrives in the mild temperatures of spring and fall. Gardeners in zones 3a through 7b get the longest radish season — you can plant in early spring and again in late summer for a fall harvest. In warmer zones (8a-10b), grow radish as a winter crop from October through February when temperatures are coolest.
Radish needs about 28 days from sowing to harvest, so any zone with at least 42frost-free days can grow it successfully. Check your zone's specific dates in the table below.
Radish planting dates by zone (2026)
| Zone | Start Indoors | Sow / Transplant | Harvest From |
|---|---|---|---|
| Zone 3a | — | Apr 17 | May 15 |
| Zone 3b | — | Apr 17 | May 15 |
| Zone 4a | — | Apr 12 | May 10 |
| Zone 4b | — | Apr 7 | May 5 |
| Zone 5a | — | Apr 2 | Apr 30 |
| Zone 5b | — | Mar 28 | Apr 25 |
| Zone 6a | — | Mar 23 | Apr 20 |
| Zone 6b | — | Mar 18 | Apr 15 |
| Zone 7a | — | Mar 13 | Apr 10 |
| Zone 7b | — | Mar 8 | Apr 5 |
| Zone 8a | — | Feb 25 | Mar 25 |
| Zone 8b | — | Feb 15 | Mar 15 |
| Zone 9a | — | Jan 28 | Feb 25 |
| Zone 9b | — | Jan 13 | Feb 10 |
| Zone 10a | — | Jan 3 | Jan 31 |
| Zone 10b | — | Dec 18 | Jan 15 |