When to plant Sweet Corn in Zone 5a
In Zone 5a, Sweet Corn: direct sow outdoors around May 5–May 26. Expect to harvest around Jul 19–Aug 9.
| Step | When |
|---|---|
| Direct sow outdoors | May 5 – May 26 |
| Harvest | Jul 19 – Aug 9 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 5a averages a last spring frost around May 5 and a first fall frost around Oct 1. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5a calendar in the tool →