Mayville, North Dakota, sits in USDA hardiness zone 4a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
On paper, cabbage, cranberry, turkish rocket, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Mayville, 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 Mayville 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 Mayville — soil, climate, flood, and parcel records. How we handle your address.
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Mayville — the short answer
Mayville, North Dakota: USDA zone 4a, about 161 days between hard freezes, across 1K acres of city.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~161
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 Mayville's average, not your lot's — a low corner or a tree line moves it. Against Mayville's 161-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mayville
Each reading below is measured for Mayville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMayville runs about 161 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
MeasuredMayville 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 Mayville is in
Mayville sits in the Lake Agassiz Plain — EPA Level III, inside the wider Great Plains. That is read at Mayville's own centroid rather than borrowed from Traill County.
What Grows in Mayville
Every plant below cleared Mayville's own zone 4a and its 161-day season. Each card opens that plant's North Dakota profile. How we score.
Is it too late to plant in Mayville?
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 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 8 — 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 Mayville
Closest first, within ~10 miles of Mayville. Listing isn't leaking, and distance isn't exposure.
- TORGESON BODY SHOP INCBrownfields · 650 ft
- Mayport Oil CoUnderground Storage Tanks · 800 ft
- Mayville StandardUnderground Storage Tanks · 850 ft
- City of Mayville City ShedUnderground Storage Tanks · 850 ft
- MayPort TesoroUnderground Storage Tanks · 1100 ft
- US West CommunicationsUnderground Storage Tanks · 1500 ft
- Mayville State UniversityUnderground Storage Tanks · 2200 ft
- BRAATEN'S BODY SHOPBrownfields · 2600 ft
- Caseys General Store #3550Underground Storage Tanks · 0.6 mi
- Cenex Convenience StoreUnderground Storage Tanks · 0.7 mi
- North Dakota State Dept of TransportationUnderground Storage Tanks · 1.0 mi
- Mayport AviationUnderground Storage Tanks · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mayville'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 Mayville.
Sources Checked
within ~10 miles of Mayville
Severity Distribution
within ~10 miles of Mayville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mayville, Nitrate runs higher than the national average — 48 sites within ~10 miles of Mayville. That's not a problem with your land — it's information about 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 Mayville
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 Mayville average
Your land is one point inside Mayville
Everything above resolves to Mayville as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Mayville Average
Mayville Average
- ●USDA Zones 4a, averaged across Mayville
- ●One soil character for all of Mayville
- ●Frost dates read at Mayville's scale: Apr 30 to Oct 8
YOUR Parcel
- ✓Your exact zone, not Mayville's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mayville
Pull a site-specific report for your exact address in Mayville, North Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mayville averages can't show:
We read public map data around Mayville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mayville average
How we know this about Mayville
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 Mayville’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 Mayville
When does frost risk typically end in Mayville?
The last hard freeze (28°F) in Mayville typically lands around Apr 30, 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 21.
When is the first frost in Mayville?
The first hard freeze (28°F) in Mayville typically arrives around Oct 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 24, so the watching starts about Sep 8 — about 161 days after the spring freeze cleared.
How long is the growing season in Mayville?
Measured between 28°F hard freezes, Mayville sees about 161 frost-free days — roughly Apr 30 through Oct 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 21 to Sep 24, about 126 days.
Is the soil safe to grow vegetables in Mayville?
The federal record around Mayville shows 65 documented sites, mostly Nitrate entries (48), the nearest Brownfields record about 0.1 miles 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 Mayville?
From about Sep 8 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Mayville's scale — its 4a band and its 161-day season. Your yard writes its own version of Mayville'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 Mayville’s own scale
6 of the readings below were taken at Mayville's own scale — its own ~161-day season between 28°F freezes, the 1,206 acres it covers and 65 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mayville's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Mayville's own 28°F hard-freeze dates, about Apr 30 and Oct 8 and the ~161-day span between themNOAA 1991–2020 Climate Normals
- 65 documented contamination sites on the federal record near Mayville, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Mayville's boundary and the 1,206 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~161-day seasonGrowable Ground crop-matching engine
- The ecoregion at Mayville's own centroid, the Lake Agassiz PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mayville's 1,206 acres read through its county's SSURGO summaryfrom Traill County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Traill 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 Traill County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mayville's 1,206 acreswhy one lot differs from the next →
- Which side of Mayville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,206 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Mayville-wide figureread your own land →
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