When to plant Sweet Corn in Zone 1b
In Zone 1b, Sweet Corn: direct sow outdoors around Jun 10–Jul 1. Expect to harvest around Aug 24–Sep 14.
| Step | When |
|---|---|
| Direct sow outdoors | Jun 10 – Jul 1 |
| Harvest | Aug 24 – Sep 14 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1b calendar in the tool →