When to plant Sunflower in Zone 11a
In Zone 11a, Sunflower: direct sow outdoors around Jan 1–Jan 22. Expect to harvest around Mar 12–Apr 2.
| Step | When |
|---|---|
| Direct sow outdoors | Jan 1 – Jan 22 |
| Harvest | Mar 12 – Apr 2 |
Tip: Direct-sow once frost has passed; sow every two weeks for a long succession of blooms.
Zone 11a averages a last spring frost around Jan 1 and a first fall frost around Dec 31. These are zone averages — look up your ZIP for your exact area.
See the full Zone 11a calendar in the tool →