When to plant Onions in Utah
In spring, from Jan 15 – Feb 15 in Ivins to May 1 – 30 in Heber.
In fall, Sept 1 – Oct 15.
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 |
|---|---|---|
| Alpine | Apr 1 – May 1 | Spring-planted |
| American Fork | Mar 15 – Apr 10 | Spring-planted |
| Bluffdale | Mar 15 – Apr 10 | Spring-planted |
| Bountiful | Mar 15 – Apr 10 | Spring-planted |
| Brigham City | Apr 1 – May 1 | Spring-planted |
| Cedar City | Apr 1 – May 1 | Spring-planted |
| Centerville | Mar 15 – Apr 10 | Spring-planted |
| Clearfield | Apr 1 – May 1 | Spring-planted |
| Clinton | Mar 15 – Apr 10 | Spring-planted |
| Cottonwood Heights | Apr 1 – May 1 | Spring-planted |
| Draper | Mar 15 – Apr 10 | Spring-planted |
| Eagle Mountain | May 1 – 30 | Spring-planted |
| Farmington | Mar 15 – Apr 10 | Spring-planted |
| Grantsville | Apr 1 – May 1 | Spring-planted |
| Heber | May 1 – 30 | Spring-planted |
| Herriman | Mar 15 – Apr 10 | Spring-planted |
| Highland | Apr 1 – May 1 | Spring-planted |
| Holladay | Apr 1 – May 1 | Spring-planted |
| Hurricane | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Hyrum | Apr 10 – May 1 | Spring-planted |
| Ivins | Jan 15 – Feb 15 | Sept 1 – Oct 15 |
| Kaysville | Mar 15 – Apr 10 | Spring-planted |
| Kearns metro | Mar 1 – Apr 1 | Not listed |
| Layton | Apr 1 – May 1 | Spring-planted |
| Lehi | Apr 1 – May 1 | Spring-planted |
| Lindon | Mar 15 – Apr 10 | Spring-planted |
| Logan | Apr 10 – May 1 | Spring-planted |
| Magna metro | Feb 15 – Mar 15 | Not listed |
| Mapleton | Mar 15 – Apr 10 | Spring-planted |
| Midvale | Apr 1 – May 1 | Spring-planted |
| Millcreek | Mar 15 – Apr 10 | Spring-planted |
| Murray | Apr 1 – May 1 | Spring-planted |
| North Logan | Apr 1 – May 1 | Spring-planted |
| North Ogden | Mar 15 – Apr 10 | Spring-planted |
| North Salt Lake | Mar 15 – Apr 10 | Spring-planted |
| Ogden | Mar 15 – Apr 10 | Spring-planted |
| Orem | Mar 15 – Apr 10 | Spring-planted |
| Payson | Apr 1 – May 1 | Spring-planted |
| Pleasant Grove | Mar 15 – Apr 10 | Spring-planted |
| Pleasant View | Mar 15 – Apr 10 | Spring-planted |
| Provo | Mar 15 – Apr 10 | Spring-planted |
| Riverton | Mar 15 – Apr 10 | Spring-planted |
| Roy | Mar 15 – Apr 10 | Spring-planted |
| Salem | Mar 15 – Apr 10 | Spring-planted |
| Salt Lake City | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Sandy | Apr 1 – May 1 | Spring-planted |
| Santaquin | Apr 1 – May 1 | Spring-planted |
| Saratoga Springs | Apr 1 – May 1 | Spring-planted |
| Smithfield | Apr 10 – May 1 | Spring-planted |
| South Jordan | Mar 15 – Apr 10 | Spring-planted |
| South Ogden | Mar 15 – Apr 10 | Spring-planted |
| South Salt Lake | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Spanish Fork | Mar 15 – Apr 10 | Spring-planted |
| Springville | Mar 15 – Apr 10 | Spring-planted |
| St. George | Jan 15 – Feb 15 | Sept 1 – Oct 15 |
| Syracuse | Mar 15 – Apr 10 | Spring-planted |
| Taylorsville | Feb 15 – Mar 15 | Sept 1 – Oct 15 |
| Tooele | Apr 1 – May 1 | Spring-planted |
| Tremonton | Mar 15 – Apr 10 | Spring-planted |
| Vernal | Apr 10 – May 1 | Spring-planted |
| Vineyard | Mar 15 – Apr 10 | Spring-planted |
| Washington | Jan 15 – Feb 15 | Sept 1 – Oct 15 |
| West Haven | Mar 15 – Apr 10 | Spring-planted |
| West Jordan | Mar 15 – Apr 10 | Spring-planted |
| West Point | Mar 15 – Apr 10 | Spring-planted |
| West Valley City | Mar 1 – Apr 1 | Not listed |
| Woods Cross | Mar 15 – Apr 10 | Spring-planted |
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 onion plants.