Whiterocks, Utah, sits in USDA hardiness zone 5b — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit cabbage, cranberry, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Whiterocks, 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 Whiterocks 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 Whiterocks — soil, climate, flood, and parcel records. How we handle your address.
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Whiterocks — the short answer
Whiterocks, Utah: USDA zone 5b, about 174 days between hard freezes, across 2K acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~174
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 5b is Whiterocks's average, not your lot's — a low corner or a tree line moves it. Against Whiterocks's 174-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Whiterocks
Each reading below is measured for Whiterocks itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWhiterocks runs about 174 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredWhiterocks sits in USDA hardiness zone 5b.
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 Whiterocks is in
Whiterocks sits in the Colorado Plateaus — EPA Level III, inside the wider North American Deserts. That is read at Whiterocks's own centroid rather than borrowed from Uintah County.
What Grows in Whiterocks
Every plant below cleared Whiterocks's own zone 5b and its 174-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Whiterocks?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 30; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — long-season crops need about 90 days of runway, quick greens only 30. Late in the year the fall bench takes over — quick greens, radishes, and garlic that repays you next summer.
What's on the federal record near Whiterocks
Closest first, within ~10 miles of Whiterocks. Listing isn't leaking, and distance isn't exposure.
- GAS & MISCUnderground Storage Tanks · 0.7 mi
- U(B- 1- 1)11abb- 1Nitrate · 2.4 mi
- U(A- 1- 1)21cbb- 1Nitrate · 2.4 mi
- U(A- 1- 1) 5aba- 1Nitrate · 3.8 mi
- U(A- 1- 1)27ddd- 1Nitrate · 4.6 mi
- USDA FOREST SERVICE ELKHORN GUARD STATIONUnderground Storage Tanks · 5.3 mi
- K & DUnderground Storage Tanks · 5.4 mi
- NEOLA ELEMENTARY BUS YARD & FIRE STATIONUnderground Storage Tanks · 5.6 mi
- U(C- 1- 1)13ccd- 1Nitrate · 5.6 mi
- U(D- 1- 1)19aaa- 2Nitrate · 5.8 mi
- T&L LIVESTOCK INCCAFO · 5.9 mi
- T & L FEEDLOTCAFO · 5.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Whiterocks'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 Whiterocks.
Total Sites
46
within ~10 miles of Whiterocks
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Whiterocks
Severity Distribution
within ~10 miles of Whiterocks
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Whiterocks, Nitrate runs higher than the national average — 32 sites within ~10 miles of Whiterocks. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Whiterocks
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 Whiterocks average
Your land is one point inside Whiterocks
Everything above resolves to Whiterocks as a whole — one PHZM band and one 28°F frost record, read across 2K 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 town 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 Whiterocks Average
Whiterocks Average
- ●USDA Zones 5b, averaged across Whiterocks
- ●One soil character for all of Whiterocks
- ●Frost dates read at Whiterocks's scale: Apr 27 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Whiterocks's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Whiterocks
Pull a site-specific report for your exact address in Whiterocks, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Whiterocks averages can't show:
We read public map data around Whiterocks — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Whiterocks average
How we know this about Whiterocks
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Whiterocks’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 town grain anywhere on this page — there is no town-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 Whiterocks
When does frost risk typically end in Whiterocks?
The last hard freeze (28°F) in Whiterocks typically lands around Apr 27, 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 May 18.
When is the first frost in Whiterocks?
The first hard freeze (28°F) in Whiterocks typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 174 days after the spring freeze cleared.
How long is the growing season in Whiterocks?
Measured between 28°F hard freezes, Whiterocks sees about 174 frost-free days — roughly Apr 27 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 18 to Oct 4, about 139 days.
Is the soil safe to grow vegetables in Whiterocks?
The federal record around Whiterocks is light — 46 documented sites across the 9 federal source types we checked, mostly Nitrate entries (32), the nearest Underground Storage Tanks record about 0.7 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Whiterocks?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Whiterocks's scale — its 5b band and its 174-day season. Your yard writes its own version of Whiterocks'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 Whiterocks’s own scale
6 of the readings below were taken at Whiterocks's own scale — its own ~174-day season between 28°F freezes, the 1,507 acres it covers and 46 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Whiterocks's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Whiterocks's own 28°F hard-freeze dates, about Apr 27 and Oct 18 and the ~174-day span between themNOAA 1991–2020 Climate Normals
- 46 documented contamination sites on the federal record near Whiterocks, the closest Underground Storage Tanks record about 0.7 miles out from the town centreFederal environmental registers
- Whiterocks's boundary and the 1,507 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~174-day seasonGrowable Ground crop-matching engine
- The ecoregion at Whiterocks's own centroid, the Colorado PlateausUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Whiterocks's 1,507 acres read through its county's SSURGO summaryfrom Uintah County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Uintah 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 Uintah County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Whiterocks's 1,507 acreswhy one lot differs from the next →
- Which side of Whiterocks you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,507 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.7 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 Whiterocks-wide figureread your own land →
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