When to plant scallion (green onion) in Utah
Utah spans USDA zones 5b–8b, so the right time to plant scallion (green onion) shifts by weeks across the state. The window to sow seed directly outdoors runs from about February 14 in St. George to May 7 in Heber — below are local dates for 67 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Salt Lake City | 7b | March 31 | November 8 | March 3 – April 14 |
| West Valley City | 7b | April 8 | October 31 | March 11 – April 22 |
| West Jordan | 7b | April 18 | October 22 | March 21 – May 2 |
| Provo | 7a | April 18 | October 21 | March 21 – May 2 |
| St. George | 8b | March 14 | November 10 | February 14 – March 28 |
| Orem | 7a | April 19 | October 19 | March 22 – May 3 |
| Sandy | 7b | April 29 | October 22 | April 1 – May 13 |
| Ogden | 6b | April 21 | October 23 | March 24 – May 5 |
Scallion (Green Onion) in Utah: FAQ
When can I plant scallion (green onion) in Utah?
Across Utah, the time to direct-sow scallion (green onion) spans roughly February 14 in St. George to May 7 in Heber, each following that city's local frost dates.
Does the scallion (green onion) planting date vary across Utah?
Yes. Utah publishes 67 cities with their own frost dates, so the right scallion (green onion) planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does scallion (green onion) take to grow in Utah?
Scallion (Green Onion) takes about 60–80 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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