When to plant Sunflower in Zone 8a
In Zone 8a, Sunflower: direct sow outdoors around Mar 22–Apr 12. Expect to harvest around May 31–Jun 21.
| Step | When |
|---|---|
| Direct sow outdoors | Mar 22 – Apr 12 |
| Harvest | May 31 – Jun 21 |
Tip: Direct-sow once frost has passed; sow every two weeks for a long succession of blooms.
Zone 8a averages a last spring frost around Mar 22 and a first fall frost around Nov 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 8a calendar in the tool →