Wetonka, South Dakota, sits in USDA hardiness zone 4b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Among the crops suited to this profile: cabbage, cranberry, turkish rocket, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Wetonka, 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 Wetonka 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 Wetonka — soil, climate, flood, and parcel records. How we handle your address.
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Wetonka — the short answer
Wetonka, South Dakota: USDA zone 4b, about 163 days between hard freezes, across 157 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~163
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 157 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 Wetonka's average, not your lot's — a low corner or a tree line moves it. Against Wetonka's 163-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wetonka
Each reading below is measured for Wetonka itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWetonka runs about 163 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
MeasuredWetonka 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 Wetonka is in
Wetonka sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Wetonka's own centroid, and it is not what its county reads: McPherson County is mostly Northwestern Glaciated Plains. The wider page above you is answering a different question about different ground.
What Grows in Wetonka
Every plant below cleared Wetonka's own zone 4b and its 163-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in Wetonka?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 29 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 9 — 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 Wetonka
Closest first, within ~10 miles of Wetonka. Listing isn't leaking, and distance isn't exposure.
- 125N66W22DADCNitrate · 750 ft
- 125N66W23ABAANitrate · 1.2 mi
- FASHION CLEANERSUnderground Storage Tanks · 4.1 mi
- 124N66W24BABNitrate · 5.6 mi
- NORTHERN BORDER PIPELINE COMP STN 9Brownfields · 6.2 mi
- MIDLAND CAMPUSUnderground Storage Tanks · 7.1 mi
- 125N67W32AAAANitrate · 7.7 mi
- ERDMANN OIL COUnderground Storage Tanks · 8.0 mi
- UNITED PARCEL SERVICEUnderground Storage Tanks · 8.8 mi
- RICHMOND LAKE RECREATION AREAUnderground Storage Tanks · 8.8 mi
- ALS SPECIALTIESBrownfields · 8.8 mi
- 123N66W 2CDC2Nitrate · 9.2 mi
2 more sites are on the record inside the same radius. See them on the map
Measured from Wetonka'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 Wetonka.
Sources Checked
within ~10 miles of Wetonka
Severity Distribution
within ~10 miles of Wetonka
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Wetonka
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 Wetonka average
Your land is one point inside Wetonka
Everything above resolves to Wetonka as a whole — one PHZM band and one 28°F frost record, read across 157 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 town 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 Wetonka Average
Wetonka Average
- ●USDA Zones 4b, averaged across Wetonka
- ●One soil character for all of Wetonka
- ●Frost dates read at Wetonka's scale: Apr 29 to Oct 9
YOUR Parcel
- ✓Your exact zone, not Wetonka's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wetonka
Pull a site-specific report for your exact address in Wetonka, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wetonka averages can't show:
We read public map data around Wetonka — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wetonka average
How we know this about Wetonka
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Wetonka’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 town grain anywhere on this page — there is no town-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 Wetonka
When does frost risk typically end in Wetonka?
The last hard freeze (28°F) in Wetonka typically lands around Apr 29, 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 20.
When is the first frost in Wetonka?
The first hard freeze (28°F) in Wetonka typically arrives around Oct 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 25, so the watching starts about Sep 9 — about 163 days after the spring freeze cleared.
How long is the growing season in Wetonka?
Measured between 28°F hard freezes, Wetonka sees about 163 frost-free days — roughly Apr 29 through Oct 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 20 to Sep 25, about 128 days.
Is the soil safe to grow vegetables in Wetonka?
The federal record around Wetonka is light — 21 documented sites across the 9 federal source types we checked, mostly Nitrate entries (14), the nearest Nitrate record about 0.1 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Wetonka?
From about Sep 9 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wetonka's scale — its 4b band and its 163-day season. Your yard writes its own version of Wetonka'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 Wetonka’s own scale
6 of the readings below were taken at Wetonka's own scale — its own ~163-day season between 28°F freezes, the 157 acres it covers and 21 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wetonka's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Wetonka's own 28°F hard-freeze dates, about Apr 29 and Oct 9 and the ~163-day span between themNOAA 1991–2020 Climate Normals
- 21 documented contamination sites on the federal record near Wetonka, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- Wetonka's boundary and the 157 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~163-day seasonGrowable Ground crop-matching engine
- Wetonka sits in the Northern Glaciated Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wetonka's 157 acres read through its county's SSURGO summaryfrom McPherson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom McPherson 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 McPherson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wetonka's 157 acreswhy one lot differs from the next →
- Which side of Wetonka you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 157 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.1 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 Wetonka-wide figureread your own land →
More in South Dakota
Wider growing context
What grows across South DakotaWetonka sits outside our named growing regions, so South Dakota as a whole is its closest context here.
Nearby growing guides