When to plant Onions in Oregon
In spring, from Jan 1 – 15 in Coos Bay to May 10 – June 10 in Redmond.
For a fall crop, from May 1 – June 10 in Baker City to Oct 1 – Dec 31 in West Linn.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Albany | Mar 15 – Apr 10 | Not listed |
| Ashland | Apr 10 – May 1 | Spring-planted |
| Baker City | Apr 20 – May 15 | May 1 – June 10 |
| Beaverton | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Bend | May 10 – June 10 | Spring-planted |
| Canby | Feb 10 – Mar 10 | Sept 1 – Oct 15 |
| Central Point | Mar 1 – Apr 1 | Not listed |
| Coos Bay | Jan 1 – 15 | Oct 1 – Dec 31Now |
| Cornelius | Mar 15 – Apr 10 | Not listed |
| Corvallis | Mar 15 – Apr 10 | Not listed |
| Cottage Grove | Mar 15 – Apr 10 | Spring-planted |
| Dallas | Mar 15 – Apr 10 | Not listed |
| Eugene | Mar 1 – Apr 1 | Spring-planted |
| Fairview | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Forest Grove | Mar 15 – Apr 10 | Not listed |
| Gladstone | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Grants Pass | Mar 1 – Apr 1 | Not listed |
| Gresham | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Happy Valley | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Hermiston | Apr 1 – May 1 | Spring-planted |
| Hillsboro | Mar 15 – Apr 10 | Spring-planted |
| Independence | Mar 15 – Apr 10 | Not listed |
| Keizer | Feb 15 – Mar 15 | Not listed |
| Klamath Falls | May 10 – June 10 | Spring-planted |
| La Grande | Apr 10 – May 1 | Spring-planted |
| Lake Oswego | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Lebanon | Jan 15 – Feb 15 | Oct 1 – Dec 31Now |
| Lincoln City | Feb 15 – Mar 15 | Oct 1 – Dec 31Now |
| McMinnville | Mar 1 – Apr 1 | Sept 1 – Oct 15 |
| Medford | Mar 1 – Apr 1 | Not listed |
| Milwaukie | Jan 1 – Feb 1 | Oct 1 – Dec 31Now |
| Molalla | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Monmouth | Mar 15 – Apr 10 | Not listed |
| Newberg | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Newport | Jan 1 – 15 | Oct 1 – Dec 31Now |
| North Bend | Jan 1 – 15 | Oct 1 – Dec 31Now |
| Ontario | Mar 15 – Apr 10 | Spring-planted |
| Oregon City | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Pendleton | Mar 15 – Apr 10 | Spring-planted |
| Portland | Jan 1 – Feb 1 | Oct 1 – Dec 31Now |
| Prineville | May 1 – 30 | Spring-planted |
| Redmond | May 10 – June 10 | May 1 – June 10 |
| Roseburg | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Salem | Feb 15 – Mar 15 | Not listed |
| Sandy | Feb 15 – Mar 15 | Oct 1 – Dec 31Now |
| Sherwood | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Silverton | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Springfield | Mar 1 – Apr 1 | Spring-planted |
| St. Helens | Mar 15 – Apr 10 | Sept 1 – Oct 15 |
| Sweet Home | Mar 1 – Apr 1 | Not listed |
| The Dalles | Mar 1 – Apr 1 | Not listed |
| Tigard | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Troutdale | Feb 15 – Mar 15 | Oct 1 – Dec 31Now |
| Tualatin | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| West Linn | Feb 10 – Mar 10 | Oct 1 – Dec 31Now |
| Wilsonville | Feb 10 – Mar 10 | Sept 1 – Oct 15 |
| Woodburn | Feb 10 – Mar 10 | Sept 1 – Oct 15 |
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 onion plants.