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Onions planting and harvest datesOnions Planting Dates in Utah
Usual onions planting periods in Utah, shown as ranges with their source. Use them to frame a plan, then adjust for your own frost dates and soil temperature.
| Activity | Window | Source | Last verified |
|---|---|---|---|
| Planting | fall harvest planting August 1 to August 10 | source | 2026-11-11 |
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planting | Planting window in August |
What these dates mean in Utah
Planting usually runs about 10 days, from Aug 1 to Aug 10.
That start date is about 123 days later than the middle of the 4 places in this data set that report onions planting dates (Mar 31).
Frost-date caveat: these are published ranges for Utah. A northern or high-elevation site will run later than a southern or low one, and a cold wet spring can push planting past the window. Group E fall-harvest planting times; frost dates and local conditions vary widely across Utah. Check your last spring frost and soil temperature, and confirm with your county extension office.
Related guides
Onions dates in other places
Other crops in Utah
- Alfalfa hay
- Beets
- Cabbage
- Corn
- Kale
- Lettuce
- Rutabaga
- Spinach
- Spring barley
- Spring oats
- Spring wheat
- Turnips
- Winter wheat
Last reviewed: November 2026. Source: USU Extension - Suggested Vegetable Planting Dates for Utah (Table 1).