Utah County
Zones 6a to 7a; most cities fall in 6a and 7a.
Utah County runs from lake-level Provo and Spanish Fork up to Alpine and the mountain benches. By the 2023 USDA data most of the county falls in zones 6b and 7a, with 6a on the higher benches. The frost dates show the same spread: USU puts Spanish Fork at an average last frost of May 1 and 165 frost-free days, while Alpine is May 20 with 136.[1]
Even inside Provo, USU gives two stations: May 1 at BYU and May 21 at the airport.[2] Plant by your own yard's record when you can.
Frost dates
| Town | Average last spring frost | Average first fall frost | Frost-free days |
|---|---|---|---|
| Alpine | May 20 | Sept. 30 | 136 |
| Spanish Fork | May 1 | Oct. 13 | 165 |
When to plant vegetables
Hardy crops (A) go in first, then semi-hardy (B), tender (C) and very tender (D). (P) means protect with a cover.
| Location | Average last frost | Group A | Group B | Group C | Group D |
|---|---|---|---|---|---|
| Provo, BYU | May 1 | March 15 | March 20 | May 1 | May 20 |
| Provo, Airport | May 21 | April 1 | April 15 | May 20 | June 1 |
| Santaquin | May 14 | March 15 | April 1 | May 14 | June 1 |
See every crop group and all 36 locations
Which lawn calendar to use
Follow the northern Utah turf calendar, which lists Utah County.[3]
Good to know here
- Provo offers approved low-water grass seed at a reduced cost through its Turf Trade program.[4]
- The Slow the Flow rebates page lists unincorporated Utah County among the places with local programs.[5]
Zone by city
Zones come from the 2023 USDA map data matched to each city's nearest ZIP codes. A range means the ZIP codes around the city disagree; your own yard may differ, so check your address on the USDA map. Tap a city for its page.
- Provo6b–7a
- Orem7a
- Lehi6a–7a
- American Fork6a–7a
- Saratoga Springs6b–7a
- Eagle Mountain6a–7a
- Spanish Fork6a–7a
- Pleasant Grove6a–7a
- Springville6b–7a
- Payson6b–7a
- Highland6a–7a
- Santaquin6b
- Vineyard7a
- Mapleton6a–7a
- Lindon7a
- Salem6a–7a
- Alpine6a–7a
- Cedar Hills6a–7a
- Cedar Fort6a–7a
- Elk Ridge6a–7a
- Fairfield6a–7a
- Genola6b
- Goshen6b
- Spring Lake6b–7a
- Woodland Hills6a–7a
Other regions
- Salt Lake County and Tooele County
- Northern Utah: Davis, Weber, Cache, Box Elder, Morgan and Rich
- Summit and Wasatch counties
- Central Utah: Juab, Millard, Sanpete, Sevier, Piute and Wayne
- Southern Utah: Washington, Iron, Kane, Garfield and Beaver
- Eastern Utah: Carbon, Emery, Grand, San Juan, Uintah, Duchesne and Daggett