When to plant Sweet corn in Oregon
In spring, from Feb 20 – Apr 15 in Coos Bay to May 20 – June 1 in Prineville.
In fall, June 1 – Aug 1.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Albany | Apr 25 – June 15 | June 1 – Aug 1 |
| Ashland | May 10 – June 1 | June 1 – July 10 |
| Baker City | May 15 – June 1 | Not listed |
| Beaverton | Mar 25 – May 15 | June 1 – Aug 15 |
| Bend | Not listed | June 1 – July 1 |
| Canby | Mar 15 – May 1 | June 1 – Aug 15 |
| Central Point | Apr 10 – June 1 | June 1 – Aug 1 |
| Coos Bay | Feb 20 – Apr 15 | Not listed |
| Cornelius | Apr 25 – June 15 | June 1 – Aug 1 |
| Corvallis | Apr 25 – June 15 | June 1 – Aug 1 |
| Cottage Grove | Apr 25 – June 15 | June 1 – July 20 |
| Dallas | Apr 25 – June 15 | June 1 – Aug 1 |
| Eugene | Apr 10 – June 1 | June 1 – July 20 |
| Fairview | Mar 15 – May 1 | June 1 – Sept 1 |
| Forest Grove | Apr 25 – June 15 | June 1 – Aug 1 |
| Gladstone | Mar 15 – May 1 | June 1 – Sept 1 |
| Grants Pass | Apr 10 – June 1 | June 1 – Aug 1 |
| Gresham | Mar 15 – May 1 | June 1 – Sept 1 |
| Happy Valley | Mar 15 – May 1 | June 1 – Sept 1 |
| Hermiston | May 10 – June 15 | June 1 – July 10 |
| Hillsboro | Apr 25 – June 15 | June 1 – July 20 |
| Independence | Apr 25 – June 15 | June 1 – Aug 1 |
| Keizer | Mar 25 – May 15 | June 1 – Aug 1 |
| Klamath Falls | Not listed | June 1 – July 1 |
| La Grande | May 10 – June 1 | June 1 – July 1 |
| Lake Oswego | Mar 15 – May 1 | June 1 – Sept 1 |
| Lebanon | Mar 10 – Apr 15 | June 1 – Sept 1 |
| Lincoln City | Mar 25 – May 15 | June 1 – Sept 1 |
| McMinnville | Apr 10 – June 1 | June 1 – Aug 15 |
| Medford | Apr 10 – June 1 | June 1 – Aug 1 |
| Milwaukie | Mar 1 – Apr 15 | Not listed |
| Molalla | Mar 15 – May 1 | June 1 – Sept 1 |
| Monmouth | Apr 25 – June 15 | June 1 – Aug 1 |
| Newberg | Mar 15 – May 1 | June 1 – Sept 1 |
| Newport | Feb 20 – Apr 15 | Not listed |
| North Bend | Feb 20 – Apr 15 | Not listed |
| Ontario | Apr 25 – June 15 | June 1 – July 10 |
| Oregon City | Mar 15 – May 1 | June 1 – Sept 1 |
| Pendleton | Apr 25 – June 15 | June 1 – July 10 |
| Portland | Mar 1 – Apr 15 | Not listed |
| Prineville | May 20 – June 1 | June 1 – July 1 |
| Redmond | Not listed | Not listed |
| Roseburg | Mar 15 – May 1 | June 1 – Sept 1 |
| Salem | Mar 25 – May 15 | June 1 – Aug 1 |
| Sandy | Mar 25 – May 15 | June 1 – Sept 1 |
| Sherwood | Mar 15 – May 1 | June 1 – Sept 1 |
| Silverton | Mar 25 – May 15 | June 1 – Aug 15 |
| Springfield | Apr 10 – June 1 | June 1 – July 20 |
| St. Helens | Apr 25 – June 15 | June 1 – Aug 15 |
| Sweet Home | Apr 10 – June 1 | June 1 – Aug 1 |
| The Dalles | Apr 10 – June 1 | June 1 – Aug 1 |
| Tigard | Mar 25 – May 15 | June 1 – Aug 15 |
| Troutdale | Mar 25 – May 15 | June 1 – Sept 1 |
| Tualatin | Mar 25 – May 15 | June 1 – Aug 15 |
| West Linn | Mar 15 – May 1 | June 1 – Sept 1 |
| Wilsonville | Mar 15 – May 1 | June 1 – Aug 15 |
| Woodburn | Mar 15 – May 1 | June 1 – Aug 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for sweet corn.