When to plant Sweet Corn in Zone 10b
In Zone 10b, Sweet Corn: direct sow outdoors around Jan 15–Feb 5. Expect to harvest around Mar 31–Apr 21.
| Step | When |
|---|---|
| Direct sow outdoors | Jan 15 – Feb 5 |
| Harvest | Mar 31 – Apr 21 |
Tip: Sow in blocks (not single rows) so wind pollinates the ears well. Wait for warm soil.
Zone 10b averages a last spring frost around Jan 15 and a first fall frost around Dec 31. These are zone averages — look up your ZIP for your exact area.
See the full Zone 10b calendar in the tool →