Halls Crossing, Utah, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include cabbage, fig, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Halls Crossing, 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 Halls Crossing 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 Halls Crossing — soil, climate, flood, and parcel records. How we handle your address.
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Halls Crossing — the short answer
Halls Crossing, Utah: USDA zone 8a, about 263 days between hard freezes, across 9K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~263
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 9K 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 8a is Halls Crossing's average, not your lot's — a low corner or a tree line moves it. Against Halls Crossing's 263-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Halls Crossing
Each reading below is measured for Halls Crossing itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHalls Crossing runs about 263 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHalls Crossing sits in USDA hardiness zone 8a.
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 Halls Crossing is in
Halls Crossing sits in the Colorado Plateaus — EPA Level III, inside the wider North American Deserts. That is read at Halls Crossing's own centroid rather than borrowed from San Juan County.
What Grows in Halls Crossing
Every plant below cleared Halls Crossing's own zone 8a and its 263-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Halls Crossing?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 20 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
What's on the federal record near Halls Crossing
Closest first, within ~10 miles of Halls Crossing. Listing isn't leaking, and distance isn't exposure.
- HALLS GENERATOR SITEUnderground Storage Tanks · 2.5 mi
- HALLSUnderground Storage Tanks · 2.6 mi
- NEW HALLS CROSSING MARINAUnderground Storage Tanks · 2.6 mi
- HALLS CROSSING VILLAGE STOREUnderground Storage Tanks · 2.8 mi
- OLD HALLS CROSSING MARINA (CHEV. #73032 )Underground Storage Tanks · 2.8 mi
- HALLS CROSSINGUnderground Storage Tanks · 3.2 mi
- BULLFROG SVC. STATION #73029Underground Storage Tanks · 5.0 mi
- BULLFROG MAINTENANCE AREAUnderground Storage Tanks · 5.0 mi
- BULLFROG RESORT & MARINAUnderground Storage Tanks · 5.0 mi
- (D-38-11) 5cdd- 1Nitrate · 5.2 mi
- BULLFROG MARINA FUEL DOCK #71678Underground Storage Tanks · 5.6 mi
- BULLFROG DEVELOPMENT AREABrownfields · 5.9 mi
Measured from Halls Crossing'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 Halls Crossing.
Sources Checked
within ~10 miles of Halls Crossing
Severity Distribution
within ~10 miles of Halls Crossing
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Halls Crossing
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 Halls Crossing average
Your land is one point inside Halls Crossing
Everything above resolves to Halls Crossing as a whole — one PHZM band and one 28°F frost record, read across 9K 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 Halls Crossing Average
Halls Crossing Average
- ●USDA Zones 8a, averaged across Halls Crossing
- ●One soil character for all of Halls Crossing
- ●Frost dates read at Halls Crossing's scale: Mar 2 to Nov 20
YOUR Parcel
- ✓Your exact zone, not Halls Crossing's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Halls Crossing
Pull a site-specific report for your exact address in Halls Crossing, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Halls Crossing averages can't show:
We read public map data around Halls Crossing — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Halls Crossing average
How we know this about Halls Crossing
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 Halls Crossing’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 Halls Crossing
When does frost risk typically end in Halls Crossing?
The last hard freeze (28°F) in Halls Crossing typically lands around Mar 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 Mar 23.
When is the first frost in Halls Crossing?
The first hard freeze (28°F) in Halls Crossing typically arrives around Nov 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 6, so the watching starts about Oct 21 — about 263 days after the spring freeze cleared.
How long is the growing season in Halls Crossing?
Measured between 28°F hard freezes, Halls Crossing sees about 263 frost-free days — roughly Mar 2 through Nov 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 23 to Nov 6, about 228 days.
Is the soil safe to grow vegetables in Halls Crossing?
The federal record around Halls Crossing is light — 13 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (10), the nearest Underground Storage Tanks record about 2.5 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 Halls Crossing?
From about Oct 21 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 Nov 20 (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 Nov 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Halls Crossing's scale — its 8a band and its 263-day season. Your yard writes its own version of Halls Crossing'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 Halls Crossing’s own scale
6 of the readings below were taken at Halls Crossing's own scale — its own ~263-day season between 28°F freezes, the 8,607 acres it covers and 13 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Halls Crossing's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Halls Crossing's own 28°F hard-freeze dates, about Mar 2 and Nov 20 and the ~263-day span between themNOAA 1991–2020 Climate Normals
- 13 documented contamination sites on the federal record near Halls Crossing, the closest Underground Storage Tanks record about 2.5 miles out from the town centreFederal environmental registers
- Halls Crossing's boundary and the 8,607 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~263-day seasonGrowable Ground crop-matching engine
- The ecoregion at Halls Crossing's own centroid, the Colorado PlateausUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Halls Crossing's 8,607 acres read through its county's SSURGO summaryfrom San Juan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom San Juan 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 San Juan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Halls Crossing's 8,607 acreswhy one lot differs from the next →
- Which side of Halls Crossing you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,607 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 2.5 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 Halls Crossing-wide figureread your own land →
More in Utah
Wider growing context
What grows across UtahHalls Crossing sits outside our named growing regions, so Utah as a whole is its closest context here.
Nearby growing guides