When to plant Sunflower in Zone 10a
In Zone 10a, Sunflower: direct sow outdoors around Jan 31–Feb 21. Expect to harvest around Apr 11–May 2.
| Step | When |
|---|---|
| Direct sow outdoors | Jan 31 – Feb 21 |
| Harvest | Apr 11 – May 2 |
Tip: Direct-sow once frost has passed; sow every two weeks for a long succession of blooms.
Zone 10a averages a last spring frost around Jan 31 and a first fall frost around Dec 28. These are zone averages — look up your ZIP for your exact area.
See the full Zone 10a calendar in the tool →