Brooktree Park, North Dakota, sits in USDA hardiness zone 4a — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Brooktree Park, 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 Brooktree Park 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 Brooktree Park — soil, climate, flood, and parcel records. How we handle your address.
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Brooktree Park — the short answer
Brooktree Park, North Dakota: USDA zone 4a, about 169 days between hard freezes, across 113 acres of town.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~169
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 113 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 Brooktree Park's average, not your lot's — a low corner or a tree line moves it. Against Brooktree Park's 169-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Brooktree Park
Each reading below is measured for Brooktree Park itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBrooktree Park runs about 169 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
MeasuredBrooktree Park 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 Brooktree Park is in
Brooktree Park sits in the Lake Agassiz Plain — EPA Level III, inside the wider Great Plains. That is read at Brooktree Park's own centroid rather than borrowed from Cass County.
What Grows in Brooktree Park
Every plant below cleared Brooktree Park's own zone 4a and its 169-day season. Each card opens that plant's North Dakota profile. How we score.
Is it too late to plant in Brooktree Park?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 30; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 13 — 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 Brooktree Park
Closest first, within ~10 miles of Brooktree Park. Listing isn't leaking, and distance isn't exposure.
- 141-049-33CABNitrate · 1.3 mi
- Harwood Diesel PlantUnderground Storage Tanks · 1.7 mi
- Petro Serve USA 66Underground Storage Tanks · 2.0 mi
- 140-049-07DCA1Nitrate · 3.7 mi
- 141-049-06CDBNitrate · 3.9 mi
- HUBERT OYE & SONS INC - ASPHALT PRODUCTSBrownfields · 4.2 mi
- Jacob Gust FarmUnderground Storage Tanks · 4.4 mi
- 141-050-11CDCNitrate · 4.5 mi
- 140-049-16DAANitrate · 4.6 mi
- 141-050-02ADDNitrate · 5.0 mi
- 140-049-15DDC1Nitrate · 5.3 mi
- MARVIN WINDOWSBrownfields · 5.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Brooktree Park'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 Brooktree Park.
Total Sites
534
within ~10 miles of Brooktree Park
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Brooktree Park
Severity Distribution
within ~10 miles of Brooktree Park
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Brooktree Park
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 Brooktree Park average
Your land is one point inside Brooktree Park
Everything above resolves to Brooktree Park as a whole — one PHZM band and one 28°F frost record, read across 113 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 Brooktree Park Average
Brooktree Park Average
- ●USDA Zones 4a, averaged across Brooktree Park
- ●One soil character for all of Brooktree Park
- ●Frost dates read at Brooktree Park's scale: Apr 27 to Oct 13
YOUR Parcel
- ✓Your exact zone, not Brooktree Park's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Brooktree Park
Pull a site-specific report for your exact address in Brooktree Park, North Dakota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Brooktree Park averages can't show:
We read public map data around Brooktree Park — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Brooktree Park average
How we know this about Brooktree Park
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 Brooktree Park’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 Brooktree Park
When does frost risk typically end in Brooktree Park?
The last hard freeze (28°F) in Brooktree Park typically lands around Apr 27, 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 18.
When is the first frost in Brooktree Park?
The first hard freeze (28°F) in Brooktree Park typically arrives around Oct 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 29, so the watching starts about Sep 13 — about 169 days after the spring freeze cleared.
How long is the growing season in Brooktree Park?
Measured between 28°F hard freezes, Brooktree Park sees about 169 frost-free days — roughly Apr 27 through Oct 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 18 to Sep 29, about 134 days.
Is the soil safe to grow vegetables in Brooktree Park?
The federal record around Brooktree Park is a meaningful one — 534 documented sites, mostly Underground Storage Tanks entries (236), the nearest Nitrate record about 1.3 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 Brooktree Park?
From about Sep 13 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Brooktree Park's scale — its 4a band and its 169-day season. Your yard writes its own version of Brooktree Park'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 Brooktree Park’s own scale
6 of the readings below were taken at Brooktree Park's own scale — its own ~169-day season between 28°F freezes, the 113 acres it covers and 534 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Brooktree Park's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Brooktree Park's own 28°F hard-freeze dates, about Apr 27 and Oct 13 and the ~169-day span between themNOAA 1991–2020 Climate Normals
- 534 documented contamination sites on the federal record near Brooktree Park, the closest Nitrate record about 1.3 miles out from the town centreFederal environmental registers
- Brooktree Park's boundary and the 113 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~169-day seasonGrowable Ground crop-matching engine
- The ecoregion at Brooktree Park's own centroid, the Lake Agassiz PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Brooktree Park's 113 acres read through its county's SSURGO summaryfrom Cass County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cass 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 Cass County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Brooktree Park's 113 acreswhy one lot differs from the next →
- Which side of Brooktree Park you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 113 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.3 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 Brooktree Park-wide figureread your own land →
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