South Ogden, Utah, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Crops well matched to these conditions include cabbage, pawpaw, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in South Ogden, 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 South Ogden 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 South Ogden — soil, climate, flood, and parcel records. How we handle your address.
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South Ogden — the short answer
South Ogden, Utah: USDA zone 7a, about 208 days between hard freezes, across 2K acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~208
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 2K 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 7a is South Ogden's average, not your lot's — a low corner or a tree line moves it. Against South Ogden's 208-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in South Ogden
Each reading below is measured for South Ogden itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSouth Ogden runs about 208 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredSouth Ogden sits in USDA hardiness zone 7a.
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 South Ogden is in
South Ogden sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at South Ogden's own centroid, and it is not what its county reads: Weber County is mostly Wasatch and Uinta Mountains. The wider page above you is answering a different question about different ground.
What Grows in South Ogden
Every plant below cleared South Ogden's own zone 7a and its 208-day season. Each card opens that plant's Utah profile. How we score.
Is it too late to plant in South Ogden?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near South Ogden
Closest first, within ~10 miles of South Ogden. Listing isn't leaking, and distance isn't exposure.
- GENEVA ROCK PRODUCTS: WEST HAVENToxics Release Inventory · 2300 ft
- BASIN MARKETS SINCLAIR #102Underground Storage Tanks · 2400 ft
- METRO #21Underground Storage Tanks · 2600 ft
- OGDEN JOHN M. BROWNING ARMORY/OMSUnderground Storage Tanks · 2600 ft
- UTAH ARNG OGDEN ARMORY/FMSBrownfields · 2600 ft
- U.H.P. HDQTRSUnderground Storage Tanks · 0.5 mi
- JIFFY STOP STOREUnderground Storage Tanks · 0.5 mi
- 46TH ST. PUMP HOUSEUnderground Storage Tanks · 0.6 mi
- PHILLIPS 66 - 55 #15201Underground Storage Tanks · 0.6 mi
- MAVERIK #411Underground Storage Tanks · 0.6 mi
- JACK B. PARSON COMPANIESUnderground Storage Tanks · 0.6 mi
- WATER TREATMENT PLANT #2Underground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from South Ogden'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 South Ogden.
Sources Checked
within ~10 miles of South Ogden
Severity Distribution
within ~10 miles of South Ogden
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around South Ogden, two things run higher than the national average within ~10 miles of South Ogden — PFAS (17 sites) and Superfund (18 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in South Ogden
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 South Ogden average
Your land is one point inside South Ogden
Everything above resolves to South Ogden as a whole — one PHZM band and one 28°F frost record, read across 2K 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 South Ogden Average
South Ogden Average
- ●USDA Zones 7a, averaged across South Ogden
- ●One soil character for all of South Ogden
- ●Frost dates read at South Ogden's scale: Apr 5 to Oct 30
YOUR Parcel
- ✓Your exact zone, not South Ogden's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in South Ogden
Pull a site-specific report for your exact address in South Ogden, Utah — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that South Ogden averages can't show:
We read public map data around South Ogden — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Ogden average
How we know this about South Ogden
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 South Ogden’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 South Ogden
When does frost risk typically end in South Ogden?
The last hard freeze (28°F) in South Ogden typically lands around Apr 5, 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 Apr 26.
When is the first frost in South Ogden?
The first hard freeze (28°F) in South Ogden typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 208 days after the spring freeze cleared.
How long is the growing season in South Ogden?
Measured between 28°F hard freezes, South Ogden sees about 208 frost-free days — roughly Apr 5 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 16, about 173 days.
Is the soil safe to grow vegetables in South Ogden?
The federal record around South Ogden runs heavier than most — 1,184 documented sites, mostly Underground Storage Tanks entries (682), the nearest Toxics Release Inventory record about 0.4 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in South Ogden?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at South Ogden's scale — its 7a band and its 208-day season. Your yard writes its own version of South Ogden'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 South Ogden’s own scale
6 of the readings below were taken at South Ogden's own scale — its own ~208-day season between 28°F freezes, the 2,497 acres it covers and 1,184 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- South Ogden's own USDA hardiness band, zones 7aUSDA PHZM 2023
- South Ogden's own 28°F hard-freeze dates, about Apr 5 and Oct 30 and the ~208-day span between themNOAA 1991–2020 Climate Normals
- 1,184 documented contamination sites on the federal record near South Ogden, the closest Toxics Release Inventory record about 0.4 miles out from the town centreFederal environmental registers
- South Ogden's boundary and the 2,497 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~208-day seasonGrowable Ground crop-matching engine
- South Ogden 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 South Ogden's 2,497 acres read through its county's SSURGO summaryfrom Weber County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Weber 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 Weber County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among South Ogden's 2,497 acreswhy one lot differs from the next →
- Which side of South Ogden you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,497 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory record about 0.4 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 South Ogden-wide figureread your own land →
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