Logan, Utah, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Among the crops suited to this profile: cabbage, hazelnut, lavender, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Logan, 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 Logan 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 Logan — soil, climate, flood, and parcel records. How we handle your address.
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Logan — the short answer
Logan, Utah: USDA zone 6a, about 183 days between hard freezes, across 12K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 20
- 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
- ~183
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 12K 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 6a is Logan's average, not your lot's — a low corner or a tree line moves it. Against Logan's 183-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Logan
Each reading below is measured for Logan itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLogan runs about 183 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
MeasuredLogan sits in USDA hardiness zone 6a.
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 Logan is in
Logan sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Logan's own centroid, and it is not what its county reads: Cache County is mostly Wasatch and Uinta Mountains. The wider page above you is answering a different question about different ground.
What Grows in Logan
Every plant below cleared Logan's own zone 6a and its 183-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in Logan?
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 Mar 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 20 (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. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Logan
Closest first, within ~10 miles of Logan. Listing isn't leaking, and distance isn't exposure.
- SUNSHINE TERRACE FOUNDATIONUnderground Storage Tanks · 1500 ft
- MAYFLOWER CONTRACT SERVICES INCBrownfields · 1600 ft
- COOK TRANSPORTATION COUnderground Storage Tanks · 1700 ft
- BELLS AUTO CENTERUnderground Storage Tanks · 1700 ft
- HERALD JOURNALUnderground Storage Tanks · 1700 ft
- CACHE VALLEY PLATING LLCBrownfields · 1800 ft
- 7-ELEVEN 1851-25472Underground Storage Tanks · 1800 ft
- BEAR RIVER RECYCLING CORPBrownfields · 1800 ft
- SHERWIN WILLIAMS CO.Brownfields · 1900 ft
- NYLA'S CHEVRONBrownfields · 2000 ft
- LINDA ROUNDSUnderground Storage Tanks · 2000 ft
- WINDOW WELDER (OLD DELL'S TEXACOUnderground Storage Tanks · 2100 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Logan'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 Logan.
Total Sites
443
within ~10 miles of Logan
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Logan
Severity Distribution
within ~10 miles of Logan
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Logan, two things run higher than the national average within ~10 miles of Logan — CAFO (9 sites) and PFAS (8 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Logan
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 Logan average
Your land is one point inside Logan
Everything above resolves to Logan as a whole — one PHZM band and one 28°F frost record, read across 12K 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 Logan Average
Logan Average
- ●USDA Zones 6a, averaged across Logan
- ●One soil character for all of Logan
- ●Frost dates read at Logan's scale: Apr 20 to Oct 20
YOUR Parcel
- ✓Your exact zone, not Logan's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Logan
Pull a site-specific report for your exact address in Logan, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Logan averages can't show:
We read public map data around Logan — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Logan average
How we know this about Logan
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 Logan’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 Logan
When does frost risk typically end in Logan?
The last hard freeze (28°F) in Logan typically lands around Apr 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 May 11.
When is the first frost in Logan?
The first hard freeze (28°F) in Logan 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 183 days after the spring freeze cleared.
How long is the growing season in Logan?
Measured between 28°F hard freezes, Logan sees about 183 frost-free days — roughly Apr 20 through Oct 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 11 to Oct 6, about 148 days.
Is the soil safe to grow vegetables in Logan?
The federal record around Logan is a meaningful one — 443 documented sites, mostly Underground Storage Tanks entries (198), the nearest Underground Storage Tanks 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 I protect my plants from frost in Logan?
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 Logan's scale — its 6a band and its 183-day season. Your yard writes its own version of Logan'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 Logan’s own scale
6 of the readings below were taken at Logan's own scale — its own ~183-day season between 28°F freezes, the 11,573 acres it covers and 443 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Logan's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Logan's own 28°F hard-freeze dates, about Apr 20 and Oct 20 and the ~183-day span between themNOAA 1991–2020 Climate Normals
- 443 documented contamination sites on the federal record near Logan, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Logan's boundary and the 11,573 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~183-day seasonGrowable Ground crop-matching engine
- Logan sits in the Central Basin and Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Logan's 11,573 acres read through its county's SSURGO summaryfrom Cache County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cache 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 Cache County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Logan's 11,573 acreswhy one lot differs from the next →
- Which side of Logan you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 11,573 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Logan-wide figureread your own land →
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