Lehi, Utah, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, hazelnut, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Lehi, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Lehi lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Lehi — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Lehi — the short answer
Lehi, Utah: USDA zone 7a, about 210 days between hard freezes, across 19K acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~210
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 19K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 7a is Lehi's average, not your lot's — a low corner or a tree line moves it. Against Lehi's 210-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lehi
Each reading below is measured for Lehi itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLehi runs about 210 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredLehi sits in USDA hardiness zone 7a.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Lehi is in
Lehi sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Lehi's own centroid, and it is not what its county reads: Utah County is mostly Wasatch and Uinta Mountains. The wider page above you is answering a different question about different ground.
What Grows in Lehi
Every plant below cleared Lehi's own zone 7a and its 210-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Lehi?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Lehi
Closest first, within ~10 miles of Lehi. Listing isn't leaking, and distance isn't exposure.
- LEHI BLOCK COMPANYUnderground Storage Tanks · 550 ft
- UTAH REFRACTORIES DEMOToxics Release Inventory · 650 ft
- (D- 5- 1) 5bbc- 1Nitrate · 700 ft
- A. P. GREEN REFRACTORIES, INCUnderground Storage Tanks · 750 ft
- VALLEY TURF FARMSUnderground Storage Tanks · 1800 ft
- (D- 5- 1) 6daa- 1Nitrate · 2000 ft
- AMERICAN FORK CITYPFAS · 2200 ft
- LEHI CITYPFAS · 2200 ft
- MDK CONSTRUCTION INCUnderground Storage Tanks · 0.5 mi
- UDOT STA. # 3423Underground Storage Tanks · 0.5 mi
- CUTLER STATIONUnderground Storage Tanks · 0.6 mi
- LEE'S ROUNDUP NO 1 OF LEHIUnderground Storage Tanks · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lehi's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Lehi.
Total Sites
773
within ~10 miles of Lehi
Risk Level
High
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Lehi
Severity Distribution
within ~10 miles of Lehi
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lehi, two things run higher than the national average within ~10 miles of Lehi — PFAS (10 sites) and Nitrate (288 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Lehi
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Lehi average
Your land is one point inside Lehi
Everything above resolves to Lehi as a whole — one PHZM band and one 28°F frost record, read across 19K acres. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at city scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Lehi Average
Lehi Average
- ●USDA Zones 7a, averaged across Lehi
- ●One soil character for all of Lehi
- ●Frost dates read at Lehi's scale: Apr 2 to Oct 29
YOUR Parcel
- ✓Your exact zone, not Lehi's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lehi
Pull a site-specific report for your exact address in Lehi, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lehi averages can't show:
We read public map data around Lehi — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lehi average
How we know this about Lehi
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Lehi’s own record; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at city grain anywhere on this page — there is no city-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Lehi
When does frost risk typically end in Lehi?
The last hard freeze (28°F) in Lehi typically lands around Apr 2, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Apr 23.
When is the first frost in Lehi?
The first hard freeze (28°F) in Lehi typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 210 days after the spring freeze cleared.
How long is the growing season in Lehi?
Measured between 28°F hard freezes, Lehi sees about 210 frost-free days — roughly Apr 2 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 15, about 175 days.
Is the soil safe to grow vegetables in Lehi?
The federal record around Lehi runs heavier than most — 773 documented sites, mostly Nitrate entries (288), the nearest Underground Storage Tanks record about 0.1 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Lehi?
From about Sep 29 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Oct 29 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Oct 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lehi's scale — its 7a band and its 210-day season. Your yard writes its own version of Lehi's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Lehi’s own scale
6 of the readings below were taken at Lehi's own scale — its own ~210-day season between 28°F freezes, the 19,418 acres it covers and 773 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lehi's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Lehi's own 28°F hard-freeze dates, about Apr 2 and Oct 29 and the ~210-day span between themNOAA 1991–2020 Climate Normals
- 773 documented contamination sites on the federal record near Lehi, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Lehi's boundary and the 19,418 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~210-day seasonGrowable Ground crop-matching engine
- Lehi sits in the Central Basin and Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Lehi's 19,418 acres read through its county's SSURGO summaryfrom Utah County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Utah County
- The growing challenges every Utah grower plans around — written at state scale, so they stay on the state guidefrom Utah
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Utah County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lehi's 19,418 acreswhy one lot differs from the next →
- Which side of Lehi you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 19,418 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Lehi-wide figureread your own land →
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