When to plant Zinnia in Zone 6a
In Zone 6a, Zinnia: start seeds indoors around Mar 24–Apr 7; transplant outdoors around Apr 28–May 5; direct sow outdoors around Apr 21–May 5. Expect to harvest around Jun 20–Jul 4.
| Step | When |
|---|---|
| Start seeds indoors | Mar 24 – Apr 7 |
| Transplant outdoors | Apr 28 – May 5 |
| Direct sow outdoors | Apr 21 – May 5 |
| Harvest | Jun 20 – Jul 4 |
| Harvest | Jun 27 – Jul 4 |
Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.
Zone 6a averages a last spring frost around Apr 21 and a first fall frost around Oct 17. These are zone averages — look up your ZIP for your exact area.
See the full Zone 6a calendar in the tool →