When to plant Sunflower in Zone 2a
In Zone 2a, Sunflower: direct sow outdoors around Jun 5–Jun 26. Expect to harvest around Aug 14–Sep 4.
| Step | When |
|---|---|
| Direct sow outdoors | Jun 5 – Jun 26 |
| Harvest | Aug 14 – Sep 4 |
Tip: Direct-sow once frost has passed; sow every two weeks for a long succession of blooms.
Zone 2a averages a last spring frost around Jun 5 and a first fall frost around Aug 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 2a calendar in the tool →