Britton, South Dakota, sits in USDA hardiness zone 4a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Well-matched crops include cabbage, cranberry, turkish rocket, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Britton, 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 Britton 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 Britton — soil, climate, flood, and parcel records. How we handle your address.
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Britton — the short answer
Britton, South Dakota: USDA zone 4a, about 171 days between hard freezes, across 465 acres of city.
- USDA zone
- 4a
- 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 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~171
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 465 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 4a is Britton's average, not your lot's — a low corner or a tree line moves it. Against Britton's 171-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Britton
Each reading below is measured for Britton itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBritton runs about 171 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
MeasuredBritton sits in USDA hardiness zone 4a.
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 Britton is in
Britton sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Britton's own centroid rather than borrowed from Marshall County.
What Grows in Britton
Every plant below cleared Britton's own zone 4a and its 171-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Britton?
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 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 12 — 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 Britton
Closest first, within ~10 miles of Britton. Listing isn't leaking, and distance isn't exposure.
- LAKE REGION DISTRIBUTINGUnderground Storage Tanks · 200 ft
- MARSHALL COUNTYUnderground Storage Tanks · 200 ft
- HOLLAND OIL INCUnderground Storage Tanks · 350 ft
- CLIFF'S ONE STOPUnderground Storage Tanks · 500 ft
- CLIFF'S ONE STOP CARDTROLUnderground Storage Tanks · 500 ft
- BUHLS OF BRITTONUnderground Storage Tanks · 600 ft
- BUHLS OF BRITTONBrownfields · 600 ft
- 127N58W23DDBNitrate · 650 ft
- BRITTON HECLA SCHOOLBrownfields · 900 ft
- WEBER BODY SHOPBrownfields · 1000 ft
- 127N58W24CCCANitrate · 1100 ft
- COUSINS CARDTROLUnderground Storage Tanks · 1300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Britton'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 Britton.
Total Sites
122
within ~10 miles of Britton
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Britton
Severity Distribution
within ~10 miles of Britton
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Britton, Nitrate runs higher than the national average — 100 sites within ~10 miles of Britton. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Britton
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 Britton average
Your land is one point inside Britton
Everything above resolves to Britton as a whole — one PHZM band and one 28°F frost record, read across 465 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 Britton Average
Britton Average
- ●USDA Zones 4a, averaged across Britton
- ●One soil character for all of Britton
- ●Frost dates read at Britton's scale: Apr 24 to Oct 12
YOUR Parcel
- ✓Your exact zone, not Britton's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Britton
Pull a site-specific report for your exact address in Britton, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Britton averages can't show:
We read public map data around Britton — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Britton average
How we know this about Britton
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 Britton’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 Britton
When does frost risk typically end in Britton?
The last hard freeze (28°F) in Britton 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 Britton?
The first hard freeze (28°F) in Britton typically arrives around Oct 12, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 28, so the watching starts about Sep 12 — about 171 days after the spring freeze cleared.
How long is the growing season in Britton?
Measured between 28°F hard freezes, Britton sees about 171 frost-free days — roughly Apr 24 through Oct 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 15 to Sep 28, about 136 days.
Is the soil safe to grow vegetables in Britton?
The federal record around Britton shows 122 documented sites, mostly Nitrate entries (100), the nearest Underground Storage Tanks record under a tenth of a mile 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 Britton?
From about Sep 12 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 12 (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 12. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Britton's scale — its 4a band and its 171-day season. Your yard writes its own version of Britton'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 Britton’s own scale
6 of the readings below were taken at Britton's own scale — its own ~171-day season between 28°F freezes, the 465 acres it covers and 122 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Britton's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Britton's own 28°F hard-freeze dates, about Apr 24 and Oct 12 and the ~171-day span between themNOAA 1991–2020 Climate Normals
- 122 documented contamination sites on the federal record near Britton, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Britton's boundary and the 465 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~171-day seasonGrowable Ground crop-matching engine
- The ecoregion at Britton's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Britton's 465 acres read through its county's SSURGO summaryfrom Marshall County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Marshall 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 Marshall County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Britton's 465 acreswhy one lot differs from the next →
- Which side of Britton you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 465 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Britton-wide figureread your own land →