When to plant Sweet Corn in Zone 1a
In Zone 1a, Sweet Corn: direct sow outdoors around Jun 15–Jul 6. Expect to harvest around Aug 29–Sep 19.
| Step | When |
|---|---|
| Direct sow outdoors | Jun 15 – Jul 6 |
| Harvest | Aug 29 – Sep 19 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 1a averages a last spring frost around Jun 15 and a first fall frost around Aug 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1a calendar in the tool →