Huron, South Dakota, sits in USDA hardiness zone 4b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Reliable performers under these conditions include cabbage, cranberry, turkish rocket, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Huron, 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 Huron 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 Huron — soil, climate, flood, and parcel records. How we handle your address.
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Huron — the short answer
Huron, South Dakota: USDA zone 4b, about 172 days between hard freezes, across 6K acres of city.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~172
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 6K 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 4b is Huron's average, not your lot's — a low corner or a tree line moves it. Against Huron's 172-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Huron
Each reading below is measured for Huron itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHuron runs about 172 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
MeasuredHuron sits in USDA hardiness zone 4b.
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 Huron is in
Huron sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Huron's own centroid rather than borrowed from Beadle County.
What Grows in Huron
Every plant below cleared Huron's own zone 4b and its 172-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Huron?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 25; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 22 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 11 — 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 Huron
Closest first, within ~10 miles of Huron. Listing isn't leaking, and distance isn't exposure.
- HURON REGIONAL MEDICAL CENTERBrownfields · 450 ft
- CITY HALLUnderground Storage Tanks · 450 ft
- PROSTROLLO COLLISION CENTERUnderground Storage Tanks · 500 ft
- IVERSON CHRYSLER CENTER, INC.Brownfields · 750 ft
- FAIR CITY GLASS & CRAFTSUnderground Storage Tanks · 900 ft
- EASTSIDE SERVICEUnderground Storage Tanks · 1100 ft
- FIRESTONE STOREBrownfields · 1200 ft
- FIRESTONE STOREUnderground Storage Tanks · 1300 ft
- HURON CLEANERS INCBrownfields · 1300 ft
- SHERWIN-WILLIAMS #703023Brownfields · 1300 ft
- GENERAL TRADING COMPANYUnderground Storage Tanks · 1300 ft
- EASTSIDE XPRESS - CP 27Underground Storage Tanks · 1400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Huron'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 Huron.
Total Sites
266
within ~10 miles of Huron
Risk Level
Elevated
Highest-severity
16 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Huron
Severity Distribution
within ~10 miles of Huron
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Huron, Nitrate runs higher than the national average — 150 sites within ~10 miles of Huron. 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 Huron
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 Huron average
Your land is one point inside Huron
Everything above resolves to Huron as a whole — one PHZM band and one 28°F frost record, read across 6K 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 Huron Average
Huron Average
- ●USDA Zones 4b, averaged across Huron
- ●One soil character for all of Huron
- ●Frost dates read at Huron's scale: Apr 22 to Oct 11
YOUR Parcel
- ✓Your exact zone, not Huron's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Huron
Pull a site-specific report for your exact address in Huron, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Huron averages can't show:
We read public map data around Huron — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Huron average
How we know this about Huron
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 Huron’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 Huron
When does frost risk typically end in Huron?
The last hard freeze (28°F) in Huron typically lands around Apr 22, 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 13.
When is the first frost in Huron?
The first hard freeze (28°F) in Huron typically arrives around Oct 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 27, so the watching starts about Sep 11 — about 172 days after the spring freeze cleared.
How long is the growing season in Huron?
Measured between 28°F hard freezes, Huron sees about 172 frost-free days — roughly Apr 22 through Oct 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 13 to Sep 27, about 137 days.
Is the soil safe to grow vegetables in Huron?
The federal record around Huron is a meaningful one — 266 documented sites, mostly Nitrate entries (150), the nearest Brownfields record under a tenth of a mile 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 Huron?
From about Sep 11 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Huron's scale — its 4b band and its 172-day season. Your yard writes its own version of Huron'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 Huron’s own scale
6 of the readings below were taken at Huron's own scale — its own ~172-day season between 28°F freezes, the 6,228 acres it covers and 266 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Huron's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Huron's own 28°F hard-freeze dates, about Apr 22 and Oct 11 and the ~172-day span between themNOAA 1991–2020 Climate Normals
- 266 documented contamination sites on the federal record near Huron, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Huron's boundary and the 6,228 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~172-day seasonGrowable Ground crop-matching engine
- The ecoregion at Huron's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Huron's 6,228 acres read through its county's SSURGO summaryfrom Beadle County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Beadle County
- The growing challenges every South Dakota grower plans around — written at state scale, so they stay on the state guidefrom South Dakota
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Beadle County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Huron's 6,228 acreswhy one lot differs from the next →
- Which side of Huron you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,228 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile 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 Huron-wide figureread your own land →
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