When to plant Mint in Zone 3b
In Zone 3b, Mint: transplant outdoors around May 20–Jun 3. Expect to harvest around Aug 3–Aug 17.
| Step | When |
|---|---|
| Transplant outdoors | May 20 – Jun 3 |
| Harvest | Aug 3 – Aug 17 |
Tip: Vigorous to the point of invasive — grow it in a pot or buried container to contain the roots.
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →