When to plant Sweet Corn in Zone 3b
In Zone 3b, Sweet Corn: direct sow outdoors around May 20–Jun 10. Expect to harvest around Aug 3–Aug 24.
| Step | When |
|---|---|
| Direct sow outdoors | May 20 – Jun 10 |
| Harvest | Aug 3 – Aug 24 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →