When to plant Zinnia in Zone 12a
In Zone 12a, Zinnia: start seeds indoors around Dec 4–Dec 18; transplant outdoors around Jan 8–Jan 15; direct sow outdoors around Jan 1–Jan 15. Expect to harvest around Mar 2–Mar 16.
| Step | When |
|---|---|
| Start seeds indoors | Dec 4 – Dec 18 |
| Transplant outdoors | Jan 8 – Jan 15 |
| Direct sow outdoors | Jan 1 – Jan 15 |
| Harvest | Mar 2 – Mar 16 |
| Harvest | Mar 9 – Mar 16 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 12a averages a last spring frost around Jan 1 and a first fall frost around Dec 31. These are zone averages — look up your ZIP for your exact area.
See the full Zone 12a calendar in the tool →