Circleville, Utah, sits in USDA hardiness zone 5b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, cranberry, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Circleville, 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 Circleville 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 Circleville — soil, climate, flood, and parcel records. How we handle your address.
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Circleville — the short answer
Circleville, Utah: USDA zone 5b, about 131 days between hard freezes, across 7K acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~131
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 7K 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 Circleville's average, not your lot's — a low corner or a tree line moves it. Against Circleville's 131-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Circleville
Each reading below is measured for Circleville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCircleville runs about 131 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
MeasuredCircleville 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 Circleville is in
Circleville sits in the Wasatch and Uinta Mountains — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Circleville's own centroid rather than borrowed from Piute County.
What Grows in Circleville
Every plant below cleared Circleville's own zone 5b and its 131-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Circleville?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 28 — long-season crops need about 90 days of runway, quick greens only 30. Even here the calendar’s edges hold value: thirty-day greens late in the window, then garlic and a rested bed for spring.
What's on the federal record near Circleville
Closest first, within ~10 miles of Circleville. Listing isn't leaking, and distance isn't exposure.
- DELBERT DALTON & SONSUnderground Storage Tanks · 1000 ft
- FEEDERLINE 065/66 ILI FACILITYBrownfields · 1200 ft
- LARRY'S CAFEUnderground Storage Tanks · 1300 ft
- FULMER CEDAR RIDGE DAIRYCAFO · 1800 ft
- (C-30- 4)25bcc- 1Nitrate · 2200 ft
- DALTON HOG FARMCAFO · 0.8 mi
- MORGAN FARMSCAFO · 1.2 mi
- (C-30- 4)13ccb- 1Nitrate · 2.0 mi
- (C-30- 3)19dbb- 1Nitrate · 2.0 mi
- DALTON TURKEY FARMCAFO · 2.5 mi
- FLYING V RANCHCAFO · 5.2 mi
- SORENSEN FEEDLOTCAFO · 5.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Circleville'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 Circleville.
Sources Checked
within ~10 miles of Circleville
Severity Distribution
within ~10 miles of Circleville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Circleville, two things run higher than the national average within ~10 miles of Circleville — CAFO (7 sites) and Mining (5 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Circleville
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 Circleville average
Your land is one point inside Circleville
Everything above resolves to Circleville as a whole — one PHZM band and one 28°F frost record, read across 7K 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 Circleville Average
Circleville Average
- ●USDA Zones 5b, averaged across Circleville
- ●One soil character for all of Circleville
- ●Frost dates read at Circleville's scale: May 20 to Sep 28
YOUR Parcel
- ✓Your exact zone, not Circleville's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Circleville
Pull a site-specific report for your exact address in Circleville, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Circleville averages can't show:
We read public map data around Circleville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Circleville average
How we know this about Circleville
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 Circleville’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 Circleville
When does frost risk typically end in Circleville?
The last hard freeze (28°F) in Circleville 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.
When is the first frost in Circleville?
The first hard freeze (28°F) in Circleville typically arrives around Sep 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 14, so the watching starts about Aug 29 — about 131 days after the spring freeze cleared.
How long is the growing season in Circleville?
Measured between 28°F hard freezes, Circleville sees about 131 frost-free days — roughly May 20 through Sep 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 10 to Sep 14, about 96 days.
Is the soil safe to grow vegetables in Circleville?
The federal record around Circleville shows 27 documented sites, mostly Underground Storage Tanks entries (8), the nearest Underground Storage Tanks record about 0.2 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do gardeners stretch the season in Circleville?
With about 131 frost-free days between hard freezes, Circleville 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 159 to 187 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 Circleville's scale — its 5b band and its 131-day season. Your yard writes its own version of Circleville'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 Circleville’s own scale
6 of the readings below were taken at Circleville's own scale — its own ~131-day season between 28°F freezes, the 7,073 acres it covers and 27 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Circleville's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Circleville's own 28°F hard-freeze dates, about May 20 and Sep 28 and the ~131-day span between themNOAA 1991–2020 Climate Normals
- 27 documented contamination sites on the federal record near Circleville, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Circleville's boundary and the 7,073 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~131-day seasonGrowable Ground crop-matching engine
- The ecoregion at Circleville's own centroid, the Wasatch and Uinta MountainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Circleville's 7,073 acres read through its county's SSURGO summaryfrom Piute County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Piute 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 Piute County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Circleville's 7,073 acreswhy one lot differs from the next →
- Which side of Circleville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 7,073 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Circleville-wide figureread your own land →
More in Utah
Wider growing context
What grows across UtahCircleville sits outside our named growing regions, so Utah as a whole is its closest context here.