When to plant Zinnia in Zone 5a
In Zone 5a, Zinnia: start seeds indoors around Apr 7–Apr 21; transplant outdoors around May 12–May 19; direct sow outdoors around May 5–May 19. Expect to harvest around Jul 4–Jul 18.
| Step | When |
|---|---|
| Start seeds indoors | Apr 7 – Apr 21 |
| Transplant outdoors | May 12 – May 19 |
| Direct sow outdoors | May 5 – May 19 |
| Harvest | Jul 4 – Jul 18 |
| Harvest | Jul 11 – Jul 18 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 5a averages a last spring frost around May 5 and a first fall frost around Oct 1. These are zone averages — look up your ZIP for your exact area.
See the full Zone 5a calendar in the tool →