When to plant in Eagle Mountain, UT
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Eagle Mountain, Utah — is derived from the closest NOAA station with complete climate normals.
With only about 106 frost-free days, Eagle Mountain has a short season — start heat-lovers indoors early, favor quick-maturing varieties, and use row cover to stretch both ends. In zone 6b, Eagle Mountain gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
FAIRFIELD · 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 Eagle Mountain’s own odds, recorded at FAIRFIELD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 32°F | Jun 24 | Jun 2 | May 18 | Sep 1 | Sep 16 | Sep 29 |
| 28°F | Jun 10 | May 19 | May 2 | Sep 10 | Sep 26 | Oct 7 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 20Full-year planting calendar
Each bar is the exact window to take a planting action in Eagle Mountain, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Eagle Mountain planting FAQ
When is the last spring frost in Eagle Mountain, UT?
Eagle Mountain's average last spring frost falls near June 2 — 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 Eagle Mountain, UT?
In Eagle Mountain, the first 32°F freeze of fall lands around September 16 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Eagle Mountain in?
Eagle Mountain is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Eagle Mountain?
Eagle Mountain has about 106 frost-free days — a short growing season — between the average last spring frost (June 2) and first fall frost (September 16).
When should I plant tomatoes in Eagle Mountain?
For Eagle Mountain, sow tomatoes indoors about April 7–April 21 and move the seedlings out around June 9, after the last spring frost.
Never miss a window in Eagle Mountain
An email when it’s time to start seeds, transplant, and sow — timed to Eagle Mountain’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Saratoga Springs · 9 km
- Lehi · 17 km
- Bluffdale · 19 km
- American Fork · 20 km
- Herriman · 20 km
- Vineyard · 22 km
- Highland · 22 km
- Riverton · 23 km
Frost dates recorded at FAIRFIELD, 9 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 Eagle Mountain, UT — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00422696. Retrieved from https://blissgarden.com/utah/eagle-mountain.