New Witten, South Dakota, sits in USDA hardiness zone 5a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
On paper, cabbage, cranberry, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in New Witten, 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 New Witten 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 New Witten — soil, climate, flood, and parcel records. How we handle your address.
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New Witten — the short answer
New Witten, South Dakota: USDA zone 5a, about 179 days between hard freezes, across 177 acres of town.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~179
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 177 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 5a is New Witten's average, not your lot's — a low corner or a tree line moves it. Against New Witten's 179-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Witten
Each reading below is measured for New Witten itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Witten runs about 179 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
MeasuredNew Witten sits in USDA hardiness zone 5a.
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 New Witten is in
New Witten sits in the Northwestern Great Plains — EPA Level III, inside the wider Great Plains. That is read at New Witten's own centroid rather than borrowed from Tripp County.
What Grows in New Witten
Every plant below cleared New Witten's own zone 5a and its 179-day season. Each card opens that plant's South Dakota profile. How we score.
Is it too late to plant in New Witten?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 17 — long-season crops need about 90 days of runway, quick greens only 30. Late in the year the fall bench takes over — quick greens, radishes, and garlic that repays you next summer.
What's on the federal record near New Witten
Closest first, within ~10 miles of New Witten. Listing isn't leaking, and distance isn't exposure.
- 100N78W33BDDBNitrate · 600 ft
- TIM & ROY MOELLERUnderground Storage Tanks · 950 ft
- 100N79W33ANitrate · 5.4 mi
- 99N79W21DABBNitrate · 7.0 mi
- UNITED PARCEL SERVICE - WINNERBrownfields · 7.2 mi
- 101N76W33BDDNitrate · 9.0 mi
- 99N79W33CBCNitrate · 9.0 mi
- GROSSENBURG IMPLEMENT INCBrownfields · 9.9 mi
- GROSSENBERG IMPLEMENT COMPANYUnderground Storage Tanks · 10.0 mi
Measured from New Witten'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 New Witten.
Sources Checked
within ~10 miles of New Witten
Severity Distribution
within ~10 miles of New Witten
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
Check your specific parcel in New Witten
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 New Witten average
Your land is one point inside New Witten
Everything above resolves to New Witten as a whole — one PHZM band and one 28°F frost record, read across 177 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 New Witten Average
New Witten Average
- ●USDA Zones 5a, averaged across New Witten
- ●One soil character for all of New Witten
- ●Frost dates read at New Witten's scale: Apr 21 to Oct 17
YOUR Parcel
- ✓Your exact zone, not New Witten's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Witten
Pull a site-specific report for your exact address in New Witten, South Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Witten averages can't show:
We read public map data around New Witten — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Witten average
How we know this about New Witten
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 New Witten’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 New Witten
When does frost risk typically end in New Witten?
The last hard freeze (28°F) in New Witten typically lands around Apr 21, 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 12.
When is the first frost in New Witten?
The first hard freeze (28°F) in New Witten typically arrives around Oct 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 3, so the watching starts about Sep 17 — about 179 days after the spring freeze cleared.
How long is the growing season in New Witten?
Measured between 28°F hard freezes, New Witten sees about 179 frost-free days — roughly Apr 21 through Oct 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 12 to Oct 3, about 144 days.
Is the soil safe to grow vegetables in New Witten?
The federal record around New Witten is light — 14 documented sites across the 9 federal source types we checked, mostly Nitrate entries (10), 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 New Witten?
From about Sep 17 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 17 (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 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Witten's scale — its 5a band and its 179-day season. Your yard writes its own version of New Witten'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 New Witten’s own scale
6 of the readings below were taken at New Witten's own scale — its own ~179-day season between 28°F freezes, the 177 acres it covers and 14 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Witten's own USDA hardiness band, zones 5aUSDA PHZM 2023
- New Witten's own 28°F hard-freeze dates, about Apr 21 and Oct 17 and the ~179-day span between themNOAA 1991–2020 Climate Normals
- 14 documented contamination sites on the federal record near New Witten, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- New Witten's boundary and the 177 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~179-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Witten's own centroid, the Northwestern Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so New Witten's 177 acres read through its county's SSURGO summaryfrom Tripp County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tripp 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 Tripp County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Witten's 177 acreswhy one lot differs from the next →
- Which side of New Witten you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 177 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 New Witten-wide figureread your own land →
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