Langdon, North Dakota, sits in USDA hardiness zone 3b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor cabbage, cranberry, epazote, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Langdon, 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 Langdon 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 Langdon — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Langdon — the short answer
Langdon, North Dakota: USDA zone 3b, about 148 days between hard freezes, across 990 acres of city.
- USDA zone
- 3b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~148
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 990 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 3b is Langdon's average, not your lot's — a low corner or a tree line moves it. Against Langdon's 148-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Langdon
Each reading below is measured for Langdon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLangdon runs about 148 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredLangdon sits in USDA hardiness zone 3b.
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 Langdon is in
Langdon sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Langdon's own centroid rather than borrowed from Cavalier County.
What Grows in Langdon
Every plant below cleared Langdon's own zone 3b and its 148-day season. Each card opens that plant's North Dakota profile. How we score.
Is it too late to plant in Langdon?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 2 — long-season crops need about 90 days of runway, quick greens only 30. When the window is tight, the fall moves are quick ones — baby greens, radishes, and garlic set for next season.
What's on the federal record near Langdon
Closest first, within ~10 miles of Langdon. Listing isn't leaking, and distance isn't exposure.
- 161-060-14CDCNitrate · 1000 ft
- Cavalier Rural Electric Coop IncUnderground Storage Tanks · 1600 ft
- Erlings Oil IncUnderground Storage Tanks · 1700 ft
- Dicks ServiceUnderground Storage Tanks · 1700 ft
- Fisk Service and WashUnderground Storage Tanks · 1900 ft
- Langdon AmocoUnderground Storage Tanks · 2100 ft
- Farmers Union Oil CompanyUnderground Storage Tanks · 2400 ft
- Superpumper 9Underground Storage Tanks · 2400 ft
- HI-WAY CLEANERSBrownfields · 2500 ft
- Langdon DepotUnderground Storage Tanks · 0.5 mi
- United Telephone ShopUnderground Storage Tanks · 0.6 mi
- Famers Union OilUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Langdon'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 Langdon.
Total Sites
96
within ~10 miles of Langdon
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Langdon
Severity Distribution
within ~10 miles of Langdon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Langdon, Nitrate runs higher than the national average — 68 sites within ~10 miles of Langdon. 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 Langdon
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 Langdon average
Your land is one point inside Langdon
Everything above resolves to Langdon as a whole — one PHZM band and one 28°F frost record, read across 990 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 Langdon Average
Langdon Average
- ●USDA Zones 3b, averaged across Langdon
- ●One soil character for all of Langdon
- ●Frost dates read at Langdon's scale: May 7 to Oct 2
YOUR Parcel
- ✓Your exact zone, not Langdon's 3b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Langdon
Pull a site-specific report for your exact address in Langdon, North Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Langdon averages can't show:
We read public map data around Langdon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Langdon average
How we know this about Langdon
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 Langdon’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 Langdon
When does frost risk typically end in Langdon?
The last hard freeze (28°F) in Langdon typically lands around May 7, 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 28.
When is the first frost in Langdon?
The first hard freeze (28°F) in Langdon typically arrives around Oct 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 18, so the watching starts about Sep 2 — about 148 days after the spring freeze cleared.
How long is the growing season in Langdon?
Measured between 28°F hard freezes, Langdon sees about 148 frost-free days — roughly May 7 through Oct 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 28 to Sep 18, about 113 days.
Is the soil safe to grow vegetables in Langdon?
The federal record around Langdon is a meaningful one — 96 documented sites, mostly Nitrate entries (68), the nearest Nitrate record about 0.2 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 gardeners stretch the season in Langdon?
With about 148 frost-free days between hard freezes, Langdon rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 176 to 204 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 7 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Langdon's scale — its 3b band and its 148-day season. Your yard writes its own version of Langdon'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 Langdon’s own scale
6 of the readings below were taken at Langdon's own scale — its own ~148-day season between 28°F freezes, the 990 acres it covers and 96 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Langdon's own USDA hardiness band, zones 3bUSDA PHZM 2023
- Langdon's own 28°F hard-freeze dates, about May 7 and Oct 2 and the ~148-day span between themNOAA 1991–2020 Climate Normals
- 96 documented contamination sites on the federal record near Langdon, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Langdon's boundary and the 990 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 3b and a ~148-day seasonGrowable Ground crop-matching engine
- The ecoregion at Langdon's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Langdon's 990 acres read through its county's SSURGO summaryfrom Cavalier County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cavalier County
- The growing challenges every North Dakota grower plans around — written at state scale, so they stay on the state guidefrom North Dakota
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Cavalier County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Langdon's 990 acreswhy one lot differs from the next →
- Which side of Langdon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 990 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.2 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 Langdon-wide figureread your own land →
More in North Dakota
Wider growing context
What grows across North DakotaLangdon sits outside our named growing regions, so North Dakota as a whole is its closest context here.