When to plant radishes in zone 4
In USDA zone 4, the last spring frost usually falls between May 1 and May 20. Sow or plant radishes around Apr 15 to Oct 9. Expect to harvest around May 16 to Oct 31.
Zone 4 dates for radishes
| Sow or plant outside | Apr 15 to Oct 9 |
|---|---|
| Harvest | May 16 to Oct 31 |
| Typical last spring frost | May 1 to May 20 |
| Typical first fall frost | around Sep 15 |
USDA zones measure winter cold, not frost dates, so these are typical dates for the zone. Towns in the same zone can be weeks apart.
Get dates for radishes in your exact town, not just your zone.
Get my dates free →How to grow radishes
The fastest reward in the garden. Read the full radishes growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.