Wahpeton, Iowa, sits in USDA hardiness zone 5a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Well-matched crops include cabbage, cranberry, lavender, 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 Wahpeton, 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 Wahpeton 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 Wahpeton — soil, climate, flood, and parcel records. How we handle your address.
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Wahpeton — the short answer
Wahpeton, Iowa: USDA zone 5a, about 181 days between hard freezes, across 767 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~181
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 767 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 Wahpeton's average, not your lot's — a low corner or a tree line moves it. Against Wahpeton's 181-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wahpeton
Each reading below is measured for Wahpeton itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWahpeton runs about 181 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
MeasuredWahpeton 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 Wahpeton is in
Wahpeton sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Wahpeton's own centroid rather than borrowed from Dickinson County.
What Grows in Wahpeton
Every plant below cleared Wahpeton's own zone 5a and its 181-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Wahpeton?
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 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — 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 Wahpeton
Closest first, within ~10 miles of Wahpeton. Listing isn't leaking, and distance isn't exposure.
- GULL POINT STATE PARKUnderground Storage Tanks · 2000 ft
- 099N37W35ABA 12868 1960Emerson BayNitrate · 1.2 mi
- OH SHUCKSUnderground Storage Tanks · 1.8 mi
- BOYS TOWN CAMPUnderground Storage Tanks · 1.8 mi
- CASEY''S GENERAL STORE 1315Underground Storage Tanks · 1.9 mi
- FORMER DEL''S MOBILUnderground Storage Tanks · 2.0 mi
- CASEY''S #1315Underground Storage Tanks · 2.1 mi
- MERCURY-EMERALD MEADOW DRIVESuperfund · 2.2 mi
- CITY OF ARNOLDS PARKUnderground Storage Tanks · 2.2 mi
- OKOBOJI WATER SUPPLYPFAS · 2.2 mi
- CYCLE COUNTRY ACCESS CORPUnderground Storage Tanks · 2.3 mi
- OAK HILL MARINAUnderground Storage Tanks · 2.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Wahpeton'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 Wahpeton.
Total Sites
175
within ~10 miles of Wahpeton
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Wahpeton
Severity Distribution
within ~10 miles of Wahpeton
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wahpeton, PFAS runs higher than the national average — 3 sites within ~10 miles of Wahpeton. 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.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Wahpeton
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 Wahpeton average
Your land is one point inside Wahpeton
Everything above resolves to Wahpeton as a whole — one PHZM band and one 28°F frost record, read across 767 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 Wahpeton Average
Wahpeton Average
- ●USDA Zones 5a, averaged across Wahpeton
- ●One soil character for all of Wahpeton
- ●Frost dates read at Wahpeton's scale: Apr 20 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Wahpeton's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wahpeton
Pull a site-specific report for your exact address in Wahpeton, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wahpeton averages can't show:
We read public map data around Wahpeton — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wahpeton average
How we know this about Wahpeton
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 Wahpeton’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 Wahpeton
When does frost risk typically end in Wahpeton?
The last hard freeze (28°F) in Wahpeton typically lands around Apr 20, 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 11.
When is the first frost in Wahpeton?
The first hard freeze (28°F) in Wahpeton typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 181 days after the spring freeze cleared.
How long is the growing season in Wahpeton?
Measured between 28°F hard freezes, Wahpeton sees about 181 frost-free days — roughly Apr 20 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 11 to Oct 4, about 146 days.
Is the soil safe to grow vegetables in Wahpeton?
The federal record around Wahpeton is a meaningful one — 175 documented sites, mostly Underground Storage Tanks entries (103), the nearest Underground Storage Tanks record about 0.4 miles 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 Wahpeton?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wahpeton's scale — its 5a band and its 181-day season. Your yard writes its own version of Wahpeton'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 Wahpeton’s own scale
6 of the readings below were taken at Wahpeton's own scale — its own ~181-day season between 28°F freezes, the 767 acres it covers and 175 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wahpeton's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Wahpeton's own 28°F hard-freeze dates, about Apr 20 and Oct 18 and the ~181-day span between themNOAA 1991–2020 Climate Normals
- 175 documented contamination sites on the federal record near Wahpeton, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Wahpeton's boundary and the 767 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~181-day seasonGrowable Ground crop-matching engine
- The ecoregion at Wahpeton's own centroid, the Western Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wahpeton's 767 acres read through its county's SSURGO summaryfrom Dickinson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Dickinson County
- The growing challenges every Iowa grower plans around — written at state scale, so they stay on the state guidefrom Iowa
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Dickinson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wahpeton's 767 acreswhy one lot differs from the next →
- Which side of Wahpeton you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 767 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Wahpeton-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaWahpeton sits outside our named growing regions, so Iowa as a whole is its closest context here.
Nearby growing guides