When to plant lemon balm in Oregon
Oregon spans USDA zones 6b–9b, so the right time to plant lemon balm shifts by weeks across the state. The window to transplant seedlings outdoors runs from about February 11 in Aloha to June 9 in Redmond — below are local dates for 69 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Portland | 8b | February 25 | December 1 | February 25 – March 11 |
| Eugene | 8b | April 11 | October 23 | April 11 – April 25 |
| Salem | 8b | April 3 | November 1 | April 3 – April 17 |
| Gresham | 9a | March 16 | November 20 | March 16 – March 30 |
| Hillsboro | 8b | April 16 | October 23 | April 16 – April 30 |
| Bend | 6b | June 6 | September 20 | June 6 – June 20 |
| Beaverton | 9a | April 1 | November 6 | April 1 – April 15 |
| Medford | 8b | April 8 | October 29 | April 8 – April 22 |
Lemon Balm in Oregon: FAQ
When can I plant lemon balm in Oregon?
Across Oregon, the time to transplant lemon balm spans roughly February 11 in Aloha to June 9 in Redmond, each following that city's local frost dates.
Does the lemon balm planting date vary across Oregon?
Yes. Oregon publishes 69 cities with their own frost dates, so the right lemon balm planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
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