When to plant Zinnia in Zone 9b
In Zone 9b, Zinnia: start seeds indoors around Jan 18–Feb 1; transplant outdoors around Feb 22–Mar 1; direct sow outdoors around Feb 15–Mar 1. Expect to harvest around Apr 16–Apr 30.
| Step | When |
|---|---|
| Start seeds indoors | Jan 18 – Feb 1 |
| Transplant outdoors | Feb 22 – Mar 1 |
| Direct sow outdoors | Feb 15 – Mar 1 |
| Harvest | Apr 16 – Apr 30 |
| Harvest | Apr 23 – Apr 30 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 9b averages a last spring frost around Feb 15 and a first fall frost around Dec 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 9b calendar in the tool →