When to plant Oregano in Zone 3a
In Zone 3a, Oregano: start seeds indoors around Mar 30–Apr 13; transplant outdoors around May 25–Jun 8. Expect to harvest around Aug 13–Aug 27.
| Step | When |
|---|---|
| Start seeds indoors | Mar 30 – Apr 13 |
| Transplant outdoors | May 25 – Jun 8 |
| Harvest | Aug 13 – Aug 27 |
Tip: Hardy perennial; flavour is strongest in full sun and poor soil. Trim before it flowers.
Zone 3a averages a last spring frost around May 25 and a first fall frost around Sep 8. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3a calendar in the tool →