When to plant in Lehi, UT
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Lehi, Utah — is derived from the closest NOAA station with complete climate normals.
In zone 7a, Lehi supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
UTAH LAKE LEHI · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Lehi’s own odds, recorded at UTAH LAKE LEHI.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 13 | May 20 | Apr 30 | Sep 16 | Sep 28 | Oct 13 |
| 32°F | May 27 | Apr 30 | Apr 14 | Sep 26 | Oct 9 | Oct 25 |
| 28°F | May 2 | Apr 15 | Mar 28 | Oct 5 | Oct 22 | Nov 6 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Lehi, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 10 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Lehi planting FAQ
When is the last spring frost in Lehi, UT?
Lehi's average last spring frost falls near April 30 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Lehi, UT?
Expect Lehi's first fall frost near October 9 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Lehi in?
Lehi is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Lehi?
Lehi has about 162 frost-free days — a moderate growing season — between the average last spring frost (April 30) and first fall frost (October 9).
When should I plant tomatoes in Lehi?
For Lehi, sow tomatoes indoors about March 5–March 19 and move the seedlings out around May 7, after the last spring frost.
Never miss a window in Lehi
An email when it’s time to start seeds, transplant, and sow — timed to Lehi’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Highland · 6 km
- American Fork · 8 km
- Bluffdale · 9 km
- Saratoga Springs · 9 km
- Draper · 9 km
- Alpine · 10 km
- Pleasant Grove · 12 km
- Riverton · 14 km
Frost dates recorded at UTAH LAKE LEHI, 7 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Lehi, UT — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00428973. Retrieved from https://blissgarden.com/utah/lehi.