Fillmore, Utah, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, blackberry, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Fillmore, 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 Fillmore 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 Fillmore — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Fillmore — the short answer
Fillmore, Utah: USDA zone 6b, about 182 days between hard freezes, across 5K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~182
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 5K 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 Fillmore's average, not your lot's — a low corner or a tree line moves it. Against Fillmore's 182-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Fillmore
Each reading below is measured for Fillmore itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFillmore 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
MeasuredFillmore 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 Fillmore is in
Fillmore sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Fillmore's own centroid rather than borrowed from Millard County.
What Grows in Fillmore
Every plant below cleared Fillmore'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 Fillmore?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 20 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Fillmore
Closest first, within ~10 miles of Fillmore. Listing isn't leaking, and distance isn't exposure.
- R&R SERVICEUnderground Storage Tanks · 0.5 mi
- FILLMORE CITY SHOPSUnderground Storage Tanks · 0.6 mi
- MILLARD HIGH SCHOOLUnderground Storage Tanks · 0.6 mi
- STARS CONOCOUnderground Storage Tanks · 0.6 mi
- FILLMORE BUS COMPOUNDUnderground Storage Tanks · 0.7 mi
- FILLMORE COMMUNITY HOSPITALBrownfields · 0.7 mi
- FILLMORE ARMORYUnderground Storage Tanks · 0.8 mi
- MILLARD COUNTY COURT COMPLEXUnderground Storage Tanks · 0.8 mi
- ABANDONED USTS /RENTAL PROP.Underground Storage Tanks · 0.8 mi
- TURNER OIL COMPANYUnderground Storage Tanks · 0.8 mi
- CITIZENS TELECOM COMPANY OF UTAH-FILLMORE CENTRAL OFFICEUnderground Storage Tanks · 0.8 mi
- DEARDEN EQUIPMENTUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Fillmore'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 Fillmore.
Total Sites
129
within ~10 miles of Fillmore
Risk Level
Moderate
Highest-severity
1 concentrated animal feeding operation
Sources Checked
within ~10 miles of Fillmore
Severity Distribution
within ~10 miles of Fillmore
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Fillmore, Nitrate runs higher than the national average — 82 sites within ~10 miles of Fillmore. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Fillmore
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 Fillmore average
Your land is one point inside Fillmore
Everything above resolves to Fillmore as a whole — one PHZM band and one 28°F frost record, read across 5K 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 city 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 Fillmore Average
Fillmore Average
- ●USDA Zones 6b, averaged across Fillmore
- ●One soil character for all of Fillmore
- ●Frost dates read at Fillmore's scale: Apr 21 to Oct 20
YOUR Parcel
- ✓Your exact zone, not Fillmore's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Fillmore
Pull a site-specific report for your exact address in Fillmore, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Fillmore averages can't show:
We read public map data around Fillmore — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Fillmore average
How we know this about Fillmore
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Fillmore’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 city grain anywhere on this page — there is no city-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 Fillmore
When does frost risk typically end in Fillmore?
The last hard freeze (28°F) in Fillmore typically lands around Apr 21, 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 12.
When is the first frost in Fillmore?
The first hard freeze (28°F) in Fillmore typically arrives around Oct 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 6, so the watching starts about Sep 20 — about 182 days after the spring freeze cleared.
How long is the growing season in Fillmore?
Measured between 28°F hard freezes, Fillmore sees about 182 frost-free days — roughly Apr 21 through Oct 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 12 to Oct 6, about 147 days.
Is the soil safe to grow vegetables in Fillmore?
The federal record around Fillmore shows 129 documented sites, mostly Nitrate entries (82), the nearest Underground Storage Tanks record about 0.5 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 I protect my plants from frost in Fillmore?
From about Sep 20 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 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 Oct 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Fillmore's scale — its 6b band and its 182-day season. Your yard writes its own version of Fillmore'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 Fillmore’s own scale
6 of the readings below were taken at Fillmore's own scale — its own ~182-day season between 28°F freezes, the 4,602 acres it covers and 129 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Fillmore's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Fillmore's own 28°F hard-freeze dates, about Apr 21 and Oct 20 and the ~182-day span between themNOAA 1991–2020 Climate Normals
- 129 documented contamination sites on the federal record near Fillmore, the closest Underground Storage Tanks record about 0.5 miles out from the town centreFederal environmental registers
- Fillmore's boundary and the 4,602 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 Fillmore's own centroid, the Central Basin and RangeUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Fillmore's 4,602 acres read through its county's SSURGO summaryfrom Millard County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Millard 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 Millard County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Fillmore's 4,602 acreswhy one lot differs from the next →
- Which side of Fillmore you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,602 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.5 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 Fillmore-wide figureread your own land →
More in Utah
Wider growing context
What grows across UtahFillmore sits outside our named growing regions, so Utah as a whole is its closest context here.