When to plant Mint in Zone 4a
In Zone 4a, Mint: transplant outdoors around May 15–May 29. Expect to harvest around Jul 29–Aug 12.
| Step | When |
|---|---|
| Transplant outdoors | May 15 – May 29 |
| Harvest | Jul 29 – Aug 12 |
Tip: Vigorous to the point of invasive — grow it in a pot or buried container to contain the roots.
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 →