When to plant Sweet Corn in Zone 3a
In Zone 3a, Sweet Corn: direct sow outdoors around May 25–Jun 15. Expect to harvest around Aug 8–Aug 29.
| Step | When |
|---|---|
| Direct sow outdoors | May 25 – Jun 15 |
| Harvest | Aug 8 – Aug 29 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 3a averages a last spring frost around May 25 and a first fall frost around Sep 8. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3a calendar in the tool →