When to plant Zinnia in Zone 10a
In Zone 10a, Zinnia: start seeds indoors around Jan 3–Jan 17; transplant outdoors around Feb 7–Feb 14; direct sow outdoors around Jan 31–Feb 14. Expect to harvest around Apr 1–Apr 15.
| Step | When |
|---|---|
| Start seeds indoors | Jan 3 – Jan 17 |
| Transplant outdoors | Feb 7 – Feb 14 |
| Direct sow outdoors | Jan 31 – Feb 14 |
| Harvest | Apr 1 – Apr 15 |
| Harvest | Apr 8 – Apr 15 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 10a averages a last spring frost around Jan 31 and a first fall frost around Dec 28. These are zone averages — look up your ZIP for your exact area.
See the full Zone 10a calendar in the tool →