Daggett County, in Utah, sits in USDA hardiness zone 5b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include cabbage, cranberry, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Daggett County lies within the Uintah Basin — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Daggett County holds more than one microclimate.
Soils and elevations shift across Daggett 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 Daggett County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Daggett County — the short answer
Daggett County, Utah: USDA zone 5b, about 143 days between hard freezes, across 446K acres.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 13
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Oct 3
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~143
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 446K 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 Daggett County's average, not your lot's — a low corner or a tree line moves it. Against Daggett County's 143-day season, see what your own ground reads.
Heat in Daggett County
Across a year, Daggett County accumulates about 1,473 growing degree days above 50°F, about 1,039 fewer than the middle Utah county — ahead of 4 of Utah’s 29 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 Daggett County
Across Daggett County, the ground is predominantly Mollisols, where Poposhia, Bigtom, and Hoymount are the most extensive named soil series. The soil is generally well drained with a loam surface. Topsoil pH runs about 7.2–8.2, slightly alkaline. Rainfall drains through hydrologic group B soils.
Soil order
Mollisols
Drainage
Well drained
Hydric soils
0%
Soil still varies lot by lot — soil types explained.
How the ground varies across Daggett County
The USDA soil survey maps 96% of Daggett County as well drained — but another 2% drains differently: 1% somewhat excessively drained, 1% moderately well drained.
Poposhia is the most extensive named soil at 6% of mapped acres, then Bigtom (6%) and Hoymount (5%).
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 Daggett County
Each reading below is measured for Daggett 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 Daggett County are well drained, in hydrologic group B — 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 Daggett County runs about pH 7.2–8.2, 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
Season length
MeasuredDaggett County runs about 143 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
Winter hardiness
MeasuredDaggett County 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 Daggett County is in
Daggett County spans 3 EPA Level III ecoregions — Wasatch and Uinta Mountains (57%), Wyoming Basin (31%) and Colorado Plateaus (12%). 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 Daggett County
We scored all 1,086 plants against Daggett County's own USDA zone 5b and its own 143-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 Utah profile.
Is it too late to plant in Daggett County?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Apr 15; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 3 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
What gets applied to farmland in Daggett County
USGS estimates 701 lb of Glyphosate on Daggett County farmland in 2019, its largest by weight, ahead of Chlorpyrifos (406 lb) and Dimethoate (309 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 Daggett County — and how to grow with it.
We checked the federal record across Daggett County — 40 documented sites across 4 of the 9 source types we track.
The most significant on record: 1 Superfund site (none NPL-listed). Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Daggett 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 Daggett County
Closest first, across Daggett County. Listing isn't leaking, and distance isn't exposure.
- Yellow Canary Uranium DepositMining · 1600 ft
- RED CANYON LODGEUnderground Storage Tanks · 1.5 mi
- UDOT STA # 3437A GREENDALE JCTUnderground Storage Tanks · 2.0 mi
- FLAMING GORGE RESORTUnderground Storage Tanks · 2.6 mi
- CEDAR SPRINGS MARINAUnderground Storage Tanks · 3.4 mi
- Silver King MineMining · 4.8 mi
- Dutch John Mountain WorkingsMining · 5.4 mi
- Dutch John MountainMining · 5.4 mi
- U.S.F.S./ ANTELOPE FLATUnderground Storage Tanks · 5.7 mi
- NORTHWEST TAP STATIONBrownfields · 5.8 mi
- FLAMING GORGE RECREATION SERVUnderground Storage Tanks · 6.1 mi
- TROUT CREEK FLYFISHER, INCUnderground Storage Tanks · 6.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Daggett 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 Daggett County.
Total Sites
40
across Daggett County
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Severity Distribution
across Daggett County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Daggett County, two things run higher than the national average across Daggett County — Mining (13 sites) and Underground Storage Tanks (25 sites). That's not a problem with your land — it's information about it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Daggett 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 Daggett County average
Your land is one point inside Daggett County
Everything above resolves to Daggett County as a whole — one PHZM band and one county frost record, read across 446K 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 Daggett County Average
Daggett County Average
- ●USDA Zones 5b, averaged across Daggett County
- ●One soil character for all of Daggett County
- ●Frost dates read at Daggett County's scale: May 13 to Oct 3
YOUR Parcel
- ✓Your exact zone, not Daggett County's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Daggett County
Pull a site-specific report for your exact address in Daggett County, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Daggett County averages can't show:
We read public map data around Daggett County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Daggett County average
How we know this about Daggett 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 Daggett County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Daggett County
When does frost risk typically end in Daggett County?
The last hard freeze (28°F) in Daggett County typically lands around May 13, 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 3.
How long is the growing season in Daggett County?
Measured between 28°F hard freezes, Daggett County sees about 143 frost-free days — roughly May 13 through Oct 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 3 to Sep 19, about 108 days.
Is the soil safe to grow vegetables in Daggett County?
The federal record around Daggett County is a meaningful one — 40 documented sites, mostly Underground Storage Tanks entries (25), the nearest Mining record about 0.3 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 Daggett County?
With about 143 frost-free days between hard freezes, Daggett 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 171 to 199 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 13 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Daggett County's scale — its 5b band and its 143-day season. Your yard writes its own version of Daggett 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 Utah's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Daggett County’s own scale
8 of the readings below were taken at Daggett County's own scale — its own ~143-day span between 28°F freezes, the 3 most extensive soil series mapped here and 40 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Daggett County's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Daggett County's own 28°F hard-freeze dates and its ~143-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Daggett CountyUSDA NRCS SSURGO
- 40 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Mining record about 0.3 miles outFederal environmental registers
- Daggett County's boundary and the 445,768 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~143-day seasonGrowable Ground crop-matching engine
- The 3 ecoregions Daggett County spans, Wasatch and Uinta Mountains the largestUS EPA Level III Ecoregions
- Which agricultural compounds go onto Daggett County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Utah grower plans around — written at state scale, so they stay on the state guidefrom Utah
What this page can’t tell you
- How the season shifts across Daggett County — the ~143 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 Daggett County's 445,768 acreswhy one lot differs from the next →
- Which of those 40 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 Daggett Countyread your own land →