New Rockford, North Dakota, sits in USDA hardiness zone 4a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Reliable performers under these conditions include cabbage, cranberry, turkish rocket, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in New Rockford, 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 Rockford 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 Rockford — soil, climate, flood, and parcel records. How we handle your address.
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New Rockford — the short answer
New Rockford, 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)
- May 1
- 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
- ~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 New Rockford's average, not your lot's — a low corner or a tree line moves it. Against New Rockford's 161-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Rockford
Each reading below is measured for New Rockford itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Rockford 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
MeasuredNew Rockford 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 New Rockford is in
New Rockford sits in the Northern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at New Rockford's own centroid rather than borrowed from Eddy County.
What Grows in New Rockford
Every plant below cleared New Rockford'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 New Rockford?
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 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 1 (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. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near New Rockford
Closest first, within ~10 miles of New Rockford. Listing isn't leaking, and distance isn't exposure.
- Mayos StandardUnderground Storage Tanks · 500 ft
- Central Service StationUnderground Storage Tanks · 550 ft
- PFAU BROS AUTO BODYBrownfields · 600 ft
- Telephone OfficeUnderground Storage Tanks · 950 ft
- Micks 281 ServiceUnderground Storage Tanks · 0.6 mi
- NEW ROCKFORD COMMUNITY HEALTH CENTERBrownfields · 0.6 mi
- CenDak Farmers Union CoopUnderground Storage Tanks · 0.6 mi
- Caseys General Store #3631Underground Storage Tanks · 0.6 mi
- Big Daddys Fill and GrillUnderground Storage Tanks · 0.6 mi
- 148-066-06BCC1Nitrate · 0.9 mi
- 148-066-06BCC3Nitrate · 0.9 mi
- New Rockford Regional AirportUnderground Storage Tanks · 1.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Rockford'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 Rockford.
Sources Checked
within ~10 miles of New Rockford
Severity Distribution
within ~10 miles of New Rockford
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Rockford, Nitrate runs higher than the national average — 56 sites within ~10 miles of New Rockford. 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 New Rockford
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 Rockford average
Your land is one point inside New Rockford
Everything above resolves to New Rockford 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 New Rockford Average
New Rockford Average
- ●USDA Zones 4a, averaged across New Rockford
- ●One soil character for all of New Rockford
- ●Frost dates read at New Rockford's scale: May 1 to Oct 9
YOUR Parcel
- ✓Your exact zone, not New Rockford's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Rockford
Pull a site-specific report for your exact address in New Rockford, North Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Rockford averages can't show:
We read public map data around New Rockford — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Rockford average
How we know this about New Rockford
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 New Rockford’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 New Rockford
When does frost risk typically end in New Rockford?
The last hard freeze (28°F) in New Rockford typically lands around May 1, 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 22.
When is the first frost in New Rockford?
The first hard freeze (28°F) in New Rockford 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 161 days after the spring freeze cleared.
How long is the growing season in New Rockford?
Measured between 28°F hard freezes, New Rockford sees about 161 frost-free days — roughly May 1 through Oct 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 22 to Sep 25, about 126 days.
Is the soil safe to grow vegetables in New Rockford?
The federal record around New Rockford shows 67 documented sites, mostly Nitrate entries (56), the nearest Underground Storage Tanks record under a tenth of a mile 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 New Rockford?
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 New Rockford's scale — its 4a band and its 161-day season. Your yard writes its own version of New Rockford'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 Rockford’s own scale
6 of the readings below were taken at New Rockford's own scale — its own ~161-day season between 28°F freezes, the 1,100 acres it covers and 67 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Rockford's own USDA hardiness band, zones 4aUSDA PHZM 2023
- New Rockford's own 28°F hard-freeze dates, about May 1 and Oct 9 and the ~161-day span between themNOAA 1991–2020 Climate Normals
- 67 documented contamination sites on the federal record near New Rockford, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- New Rockford's boundary and the 1,100 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 New Rockford's own centroid, the Northern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so New Rockford's 1,100 acres read through its county's SSURGO summaryfrom Eddy County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Eddy 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 Eddy County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Rockford's 1,100 acreswhy one lot differs from the next →
- Which side of New Rockford you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,100 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Rockford-wide figureread your own land →
More in North Dakota
Wider growing context
What grows across North DakotaNew Rockford sits outside our named growing regions, so North Dakota as a whole is its closest context here.
Nearby growing guides