Kenilworth, Utah, sits in USDA hardiness zone 6b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, blackberry, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Kenilworth, 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 Kenilworth 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 Kenilworth — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Kenilworth — the short answer
Kenilworth, Utah: USDA zone 6b, about 182 days between hard freezes, across 481 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~182
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 481 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 6b is Kenilworth's average, not your lot's — a low corner or a tree line moves it. Against Kenilworth's 182-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kenilworth
Each reading below is measured for Kenilworth itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredKenilworth runs about 182 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
MeasuredKenilworth sits in USDA hardiness zone 6b.
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 Kenilworth is in
Kenilworth sits in the Colorado Plateaus — EPA Level III, inside the wider North American Deserts. That is read at Kenilworth's own centroid rather than borrowed from Carbon County.
What Grows in Kenilworth
Every plant below cleared Kenilworth's own zone 6b and its 182-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Kenilworth?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — 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 Kenilworth
Closest first, within ~10 miles of Kenilworth. Listing isn't leaking, and distance isn't exposure.
- KENILWORTH STORE MERCANTILEUnderground Storage Tanks · 0.7 mi
- DENVER & RIO GRANDE WESTER RRUnderground Storage Tanks · 2.1 mi
- HANDY MARTUnderground Storage Tanks · 2.1 mi
- HELPER CITY MUNICIPAL CORPUnderground Storage Tanks · 2.2 mi
- DENVER & RIO GRANDE WESTERN RR HELPER HQUnderground Storage Tanks · 2.2 mi
- CENTER SERVICE & CAR WASHUnderground Storage Tanks · 2.2 mi
- NORMAN CURTISUnderground Storage Tanks · 2.2 mi
- HELPER YARDBrownfields · 2.2 mi
- HELPER MERCANTILEUnderground Storage Tanks · 2.2 mi
- HELPER 66Underground Storage Tanks · 2.2 mi
- MARASCO & SONS TRUCKING CO.Underground Storage Tanks · 2.3 mi
- MORGANTOWN MACHINE & HYDRAULIC OF UT INCBrownfields · 2.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kenilworth'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 Kenilworth.
Total Sites
146
within ~10 miles of Kenilworth
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Kenilworth
Severity Distribution
within ~10 miles of Kenilworth
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kenilworth, Underground Storage Tanks runs higher than the national average — 107 sites within ~10 miles of Kenilworth. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Kenilworth
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 Kenilworth average
Your land is one point inside Kenilworth
Everything above resolves to Kenilworth as a whole — one PHZM band and one 28°F frost record, read across 481 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 Kenilworth Average
Kenilworth Average
- ●USDA Zones 6b, averaged across Kenilworth
- ●One soil character for all of Kenilworth
- ●Frost dates read at Kenilworth's scale: Apr 24 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Kenilworth's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kenilworth
Pull a site-specific report for your exact address in Kenilworth, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kenilworth averages can't show:
We read public map data around Kenilworth — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kenilworth average
How we know this about Kenilworth
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 Kenilworth’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 Kenilworth
When does frost risk typically end in Kenilworth?
The last hard freeze (28°F) in Kenilworth typically lands around Apr 24, 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 15.
When is the first frost in Kenilworth?
The first hard freeze (28°F) in Kenilworth typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 182 days after the spring freeze cleared.
How long is the growing season in Kenilworth?
Measured between 28°F hard freezes, Kenilworth sees about 182 frost-free days — roughly Apr 24 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 15 to Oct 9, about 147 days.
Is the soil safe to grow vegetables in Kenilworth?
The federal record around Kenilworth is a meaningful one — 146 documented sites, mostly Underground Storage Tanks entries (107), the nearest Underground Storage Tanks record about 0.7 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 I protect my plants from frost in Kenilworth?
From about Sep 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kenilworth's scale — its 6b band and its 182-day season. Your yard writes its own version of Kenilworth'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 Kenilworth’s own scale
6 of the readings below were taken at Kenilworth's own scale — its own ~182-day season between 28°F freezes, the 481 acres it covers and 146 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Kenilworth's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Kenilworth's own 28°F hard-freeze dates, about Apr 24 and Oct 23 and the ~182-day span between themNOAA 1991–2020 Climate Normals
- 146 documented contamination sites on the federal record near Kenilworth, the closest Underground Storage Tanks record about 0.7 miles out from the town centreFederal environmental registers
- Kenilworth's boundary and the 481 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~182-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kenilworth's own centroid, the Colorado PlateausUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Kenilworth's 481 acres read through its county's SSURGO summaryfrom Carbon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Carbon 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 Carbon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kenilworth's 481 acreswhy one lot differs from the next →
- Which side of Kenilworth you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 481 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 Kenilworth-wide figureread your own land →
More in Utah
Wider growing context
What grows across UtahKenilworth sits outside our named growing regions, so Utah as a whole is its closest context here.
Nearby growing guides