When to plant Calendula in Zone 4a
In Zone 4a, Calendula: direct sow outdoors around May 1–May 29; direct sow outdoors around Jul 24–Aug 7. Expect to harvest around Jun 20–Jul 18.
| Step | When |
|---|---|
| Direct sow outdoors | May 1 – May 29 |
| Direct sow outdoors | Jul 24 – Aug 7 |
| Harvest | Jun 20 – Jul 18 |
| Harvest | Sep 12 – Sep 26 |
Tip: Cool-season and edible; deadhead often and it'll bloom from spring into fall.
Zone 4a averages a last spring frost around May 15 and a first fall frost around Sep 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4a calendar in the tool →