Uinta County, in Wyoming, sits in USDA hardiness zone 5b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor cabbage, cranberry, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Uinta County holds more than one microclimate.
Soils and elevations shift across Uinta County, so your frost dates and drainage aren't the county average. 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 Uinta County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Uinta County — the short answer
Uinta County, Wyoming: USDA zone 5b, about 132 days between hard freezes, across 1.3M acres.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 20
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Sep 29
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~132
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 1.3M acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Uinta County's average, not your lot's — a low corner or a tree line moves it. Against Uinta County's 132-day season, see what your own ground reads.
Heat in Uinta County
Across a year, Uinta County accumulates about 1,233 growing degree days above 50°F, about 641 fewer than the middle Wyoming county — ahead of 5 of Wyoming’s 23 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Uinta County
Across Uinta County, the ground is predominantly Mollisols, where Millburne, Groshon, and Hickey are the most extensive named soil series. The soil is generally well drained with a sandy loam surface. Topsoil pH runs about 7.2–8.0, slightly alkaline. Rainfall drains through hydrologic group B/D soils.
Soil order
Mollisols
Drainage
Well drained
Hydric soils
19%
Soil still varies lot by lot — soil types explained.
How the ground varies across Uinta County
The USDA soil survey maps 65% of Uinta County as well drained — but another 8% drains differently: 3% moderately well drained, 3% very poorly drained.
Millburne is the most extensive named soil at 20% of mapped acres, then Groshon (17%) and Hickey (6%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Uinta County
Each reading below is measured for Uinta County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Uinta County are well drained, in hydrologic group B/D — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Uinta County runs about pH 7.2–8.0, on the alkaline side.
Many vegetables cope, but acid-lovers like blueberries struggle, and iron and manganese lock up above about pH 7.5 — leaves yellow between the veins even in rich soil.
Elemental sulfur and generous organic matter lower pH slowly for the beds that need it; test first so you add only what the soil actually calls for.
USDA NRCS SSURGO
Wet ground
MeasuredAbout 19% of Uinta County is mapped as hydric — wetland — soil.
If your lot falls in one of those pockets, a standard in-ground bed will fight waterlogging all season, and roots that need air will struggle.
Check how your own ground drains before you dig; raised beds or moisture-loving plantings turn a wet corner from a problem into a niche.
USDA NRCS SSURGO
Season length
MeasuredUinta County runs about 132 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
The kind of country Uinta County is in
Uinta County spans 2 EPA Level III ecoregions — Wyoming Basin (91%) and Wasatch and Uinta Mountains (9%). Which one your land falls in changes what grows wild there and how the ground behaves, and a county-wide answer cannot tell you which.
What Grows in Uinta County
We scored all 1,086 plants against Uinta County's own USDA zone 5b and its own 132-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Wyoming profile.
Is it too late to plant in Uinta County?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 22; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 29 — long-season crops need about 90 days of runway, quick greens only 30. Short seasons reward decisiveness — quick-maturing varieties late, hardy greens under cover, and next year’s garlic in the ground before it closes.
What gets applied to farmland in Uinta County
USGS estimates 2,797 lb of 2,4-d on Uinta County farmland in 2019, its largest by weight, ahead of Chlorpyrifos (1,964 lb) and Glyphosate (1,654 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Uinta County — and how to grow with it.
We checked the federal record across Uinta County — 342 documented sites across 4 of the 9 source types we track.
The most significant on record: 8 Toxics Release Inventory facilities. Active industrial facilities reporting chemical releases to air, water, and land.
There's a meaningful federal record across Uinta County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Uinta County
Closest first, across Uinta County. Listing isn't leaking, and distance isn't exposure.
- MOUNTAIN WIND POWERBrownfields · 0.8 mi
- 15-117-10 01Nitrate · 2.1 mi
- FORT BRIDGER TRAVEL CENTERBrownfields · 3.3 mi
- Fort Bridger Travel CenterUnderground Storage Tanks · 3.3 mi
- Texaco StationUnderground Storage Tanks · 3.4 mi
- Fort Bridger MotelUnderground Storage Tanks · 3.4 mi
- LEROY STATIONBrownfields · 3.8 mi
- 15-116-35dda01Nitrate · 6.5 mi
- 15-115-20cba01Nitrate · 7.8 mi
- Fort Bridger VortacUnderground Storage Tanks · 8.5 mi
- 16-115-33ccd01Nitrate · 9.0 mi
- Wagon Wheel Motel and CaféUnderground Storage Tanks · 9.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Uinta County'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 Uinta County.
Total Sites
342
across Uinta County
Risk Level
Elevated
Highest-severity
8 Toxics Release Inventory facilities
Sources Checked
across Uinta County
Severity Distribution
across Uinta County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Uinta County, Nitrate runs higher than the national average — 110 sites across Uinta County. 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 Uinta County
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 Uinta County average
Your land is one point inside Uinta County
Everything above resolves to Uinta County as a whole — one PHZM band and one county frost record, read across 1.3M 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 county 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 county average.
Your Lot vs the Uinta County Average
Uinta County Average
- ●USDA Zones 5b, averaged across Uinta County
- ●One soil character for all of Uinta County
- ●Frost dates read at Uinta County's scale: May 20 to Sep 29
YOUR Parcel
- ✓Your exact zone, not Uinta County's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Uinta County
Pull a site-specific report for your exact address in Uinta County, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Uinta County averages can't show:
We read public map data around Uinta County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Uinta County average
How we know this about Uinta County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Uinta County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Uinta County
When does frost risk typically end in Uinta County?
The last hard freeze (28°F) in Uinta County typically lands around May 20, 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 Jun 10.
How long is the growing season in Uinta County?
Measured between 28°F hard freezes, Uinta County sees about 132 frost-free days — roughly May 20 through Sep 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 10 to Sep 15, about 97 days.
Is the soil safe to grow vegetables in Uinta County?
The federal record around Uinta County is a meaningful one — 342 documented sites, mostly Underground Storage Tanks entries (141), the nearest Brownfields record about 0.8 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do gardeners stretch the season in Uinta County?
With about 132 frost-free days between hard freezes, Uinta County rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 160 to 188 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 20 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Uinta County's scale — its 5b band and its 132-day season. Your yard writes its own version of Uinta County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Wyoming's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Uinta County’s own scale
8 of the readings below were taken at Uinta County's own scale — its own ~132-day span between 28°F freezes, the 3 most extensive soil series mapped here and 342 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Uinta County's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Uinta County's own 28°F hard-freeze dates and its ~132-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Uinta CountyUSDA NRCS SSURGO
- 342 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Brownfields record about 0.8 miles outFederal environmental registers
- Uinta County's boundary and the 1,332,303 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~132-day seasonGrowable Ground crop-matching engine
- The 2 ecoregions Uinta County spans, Wyoming Basin the largestUS EPA Level III Ecoregions
- Which agricultural compounds go onto Uinta County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Wyoming grower plans around — written at state scale, so they stay on the state guidefrom Wyoming
What this page can’t tell you
- How the season shifts across Uinta County — the ~132 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Uinta County's 1,332,303 acreswhy one lot differs from the next →
- Which of those 342 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Uinta Countyread your own land →