When to plant Cosmos in Zone 7a
In Zone 7a, Cosmos: direct sow outdoors around Apr 7–Apr 21. Expect to harvest around Jun 6–Jun 20.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 7 – Apr 21 |
| Harvest | Jun 6 – Jun 20 |
Tip: Thrives on neglect — too-rich soil gives leaves at the expense of flowers.
Zone 7a averages a last spring frost around Apr 7 and a first fall frost around Nov 2. These are zone averages — look up your ZIP for your exact area.
See the full Zone 7a calendar in the tool →