When to plant rhubarb in Oregon
Oregon spans USDA zones 6b–9b, so the right time to plant rhubarb shifts by weeks across the state. The window to transplant seedlings outdoors runs from about December 31 in Aloha to April 28 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 | January 14 – February 11 |
| Eugene | 8b | April 11 | October 23 | February 28 – March 28 |
| Salem | 8b | April 3 | November 1 | February 20 – March 20 |
| Gresham | 9a | March 16 | November 20 | February 2 – March 2 |
| Hillsboro | 8b | April 16 | October 23 | March 5 – April 2 |
| Bend | 6b | June 6 | September 20 | April 25 – May 23 |
| Beaverton | 9a | April 1 | November 6 | February 18 – March 18 |
| Medford | 8b | April 8 | October 29 | February 25 – March 25 |
Rhubarb in Oregon: FAQ
When can I plant rhubarb in Oregon?
Across Oregon, the time to transplant rhubarb spans roughly December 31 in Aloha to April 28 in Redmond, each following that city's local frost dates.
Does the rhubarb planting date vary across Oregon?
Yes. Oregon publishes 69 cities with their own frost dates, so the right rhubarb 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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