When to plant Zinnia in Zone 9a
In Zone 9a, Zinnia: start seeds indoors around Jan 31–Feb 14; transplant outdoors around Mar 7–Mar 14; direct sow outdoors around Feb 28–Mar 14. Expect to harvest around Apr 29–May 13.
| Step | When |
|---|---|
| Start seeds indoors | Jan 31 – Feb 14 |
| Transplant outdoors | Mar 7 – Mar 14 |
| Direct sow outdoors | Feb 28 – Mar 14 |
| Harvest | Apr 29 – May 13 |
| Harvest | May 6 – May 13 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 9a averages a last spring frost around Feb 28 and a first fall frost around Dec 5. These are zone averages — look up your ZIP for your exact area.
See the full Zone 9a calendar in the tool →