When to plant Radish in Zone 4b
In Zone 4b, Radish: direct sow outdoors around Apr 12–May 24; direct sow outdoors around Jul 28–Aug 25. Expect to harvest around May 10–Jun 21.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 12 – May 24 |
| Direct sow outdoors | Jul 28 – Aug 25 |
| Harvest | May 10 – Jun 21 |
| Harvest | Aug 25 – Sep 22 |
Tip: The fastest crop in the garden — sow in succession and harvest before they turn woody.
Zone 4b averages a last spring frost around May 10 and a first fall frost around Sep 22. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4b calendar in the tool →