When to plant Zinnia in Zone 6b
In Zone 6b, Zinnia: start seeds indoors around Mar 18–Apr 1; transplant outdoors around Apr 22–Apr 29; direct sow outdoors around Apr 15–Apr 29. Expect to harvest around Jun 14–Jun 28.
| Step | When |
|---|---|
| Start seeds indoors | Mar 18 – Apr 1 |
| Transplant outdoors | Apr 22 – Apr 29 |
| Direct sow outdoors | Apr 15 – Apr 29 |
| Harvest | Jun 14 – Jun 28 |
| Harvest | Jun 21 – Jun 28 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 6b averages a last spring frost around Apr 15 and a first fall frost around Oct 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 6b calendar in the tool →