When to plant Sweet potatoes in Oregon
In spring, from Mar 20 – June 1 in Coos Bay to May 20 – June 10 in Hermiston.
In fall, from May 20 – June 10 in Ashland to June 1 – July 1 in Woodburn.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Albany | May 10 – June 10 | June 1 – 15 |
| Ashland | Not listed | May 20 – June 10 |
| Baker City | Not listed | Not listed |
| Beaverton | Apr 20 – June 1 | June 1 – July 1 |
| Bend | Not listed | Not listed |
| Canby | Apr 10 – June 1 | June 1 – July 1 |
| Central Point | May 1 – June 1 | June 1 – 15 |
| Coos Bay | Mar 20 – June 1 | June 1 – July 1 |
| Cornelius | May 10 – June 10 | June 1 – 15 |
| Corvallis | May 10 – June 10 | June 1 – 15 |
| Cottage Grove | May 10 – June 10 | June 1 – 15 |
| Dallas | May 10 – June 10 | June 1 – 15 |
| Eugene | May 1 – June 1 | June 1 – 15 |
| Fairview | Apr 10 – June 1 | June 1 – July 1 |
| Forest Grove | May 10 – June 10 | June 1 – 15 |
| Gladstone | Apr 10 – June 1 | June 1 – July 1 |
| Grants Pass | May 1 – June 1 | June 1 – 15 |
| Gresham | Apr 10 – June 1 | June 1 – July 1 |
| Happy Valley | Apr 10 – June 1 | June 1 – July 1 |
| Hermiston | May 20 – June 10 | May 20 – June 10 |
| Hillsboro | May 10 – June 10 | June 1 – 15 |
| Independence | May 10 – June 10 | June 1 – 15 |
| Keizer | Apr 20 – June 1 | June 1 – 15 |
| Klamath Falls | Not listed | Not listed |
| La Grande | Not listed | Not listed |
| Lake Oswego | Apr 10 – June 1 | June 1 – July 1 |
| Lebanon | Apr 1 – June 1 | June 1 – July 1 |
| Lincoln City | Apr 20 – June 1 | June 1 – July 1 |
| McMinnville | May 1 – June 1 | June 1 – July 1 |
| Medford | May 1 – June 1 | June 1 – 15 |
| Milwaukie | Mar 20 – June 1 | June 1 – July 1 |
| Molalla | Apr 10 – June 1 | June 1 – July 1 |
| Monmouth | May 10 – June 10 | June 1 – 15 |
| Newberg | Apr 10 – June 1 | June 1 – July 1 |
| Newport | Mar 20 – June 1 | June 1 – July 1 |
| North Bend | Mar 20 – June 1 | June 1 – July 1 |
| Ontario | May 10 – June 10 | May 20 – June 10 |
| Oregon City | Apr 10 – June 1 | June 1 – July 1 |
| Pendleton | May 10 – June 10 | May 20 – June 10 |
| Portland | Mar 20 – June 1 | June 1 – July 1 |
| Prineville | Not listed | Not listed |
| Redmond | Not listed | Not listed |
| Roseburg | Apr 10 – June 1 | June 1 – July 1 |
| Salem | Apr 20 – June 1 | June 1 – 15 |
| Sandy | Apr 20 – June 1 | June 1 – July 1 |
| Sherwood | Apr 10 – June 1 | June 1 – July 1 |
| Silverton | Apr 20 – June 1 | June 1 – July 1 |
| Springfield | May 1 – June 1 | June 1 – 15 |
| St. Helens | May 10 – June 10 | June 1 – July 1 |
| Sweet Home | May 1 – June 1 | June 1 – 15 |
| The Dalles | May 1 – June 1 | June 1 – 15 |
| Tigard | Apr 20 – June 1 | June 1 – July 1 |
| Troutdale | Apr 20 – June 1 | June 1 – July 1 |
| Tualatin | Apr 20 – June 1 | June 1 – July 1 |
| West Linn | Apr 10 – June 1 | June 1 – July 1 |
| Wilsonville | Apr 10 – June 1 | June 1 – July 1 |
| Woodburn | Apr 10 – June 1 | June 1 – July 1 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for sweet potatoes.