Niarada, Montana, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Crops well matched to these conditions include cabbage, blackberry, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Niarada, 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 Niarada 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 Niarada — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Niarada — the short answer
Niarada, Montana: USDA zone 6a, about 164 days between hard freezes, across 32K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~164
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 32K 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 6a is Niarada's average, not your lot's — a low corner or a tree line moves it. Against Niarada's 164-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Niarada
Each reading below is measured for Niarada itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNiarada runs about 164 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
MeasuredNiarada sits in USDA hardiness zone 6a.
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 Niarada is in
Niarada sits in the Northern Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Niarada's own centroid, and it is not what its county reads: Flathead County is mostly Canadian Rockies. The wider page above you is answering a different question about different ground.
What Grows in Niarada
Every plant below cleared Niarada's own zone 6a and its 164-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Niarada?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 29 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 10 — 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 Niarada
Closest first, within ~10 miles of Niarada. Listing isn't leaking, and distance isn't exposure.
- 24N23W17DAC 01Nitrate · 0.6 mi
- 24N24W25DDBB01Nitrate · 2.8 mi
- 24N24W27ABDB01Nitrate · 4.6 mi
- Dale MineMining · 4.7 mi
- HOT SPRINGS SUBSTATIONUnderground Storage Tanks · 5.3 mi
- 23N24W03BAB 01Nitrate · 5.7 mi
- O.F. Martin MineMining · 5.7 mi
- Martin and Battle Butte MinesMining · 5.7 mi
- Bergman & Murphy PropertyMining · 5.7 mi
- Martin MineMining · 5.9 mi
- Hog Heaven DistrictMining · 6.0 mi
- Golden Queen No 1 MineMining · 6.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Niarada'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 Niarada.
Sources Checked
within ~10 miles of Niarada
Severity Distribution
within ~10 miles of Niarada
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Niarada, two things run higher than the national average within ~10 miles of Niarada — Mining (27 sites) and Nitrate (22 sites). That's not a problem with your land — it's information about it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Niarada
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 Niarada average
Your land is one point inside Niarada
Everything above resolves to Niarada as a whole — one PHZM band and one 28°F frost record, read across 32K 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 Niarada Average
Niarada Average
- ●USDA Zones 6a, averaged across Niarada
- ●One soil character for all of Niarada
- ●Frost dates read at Niarada's scale: Apr 29 to Oct 10
YOUR Parcel
- ✓Your exact zone, not Niarada's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Niarada
Pull a site-specific report for your exact address in Niarada, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Niarada averages can't show:
We read public map data around Niarada — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Niarada average
How we know this about Niarada
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 Niarada’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 Niarada
When does frost risk typically end in Niarada?
The last hard freeze (28°F) in Niarada typically lands around Apr 29, 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 20.
When is the first frost in Niarada?
The first hard freeze (28°F) in Niarada typically arrives around Oct 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 26, so the watching starts about Sep 10 — about 164 days after the spring freeze cleared.
How long is the growing season in Niarada?
Measured between 28°F hard freezes, Niarada sees about 164 frost-free days — roughly Apr 29 through Oct 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 20 to Sep 26, about 129 days.
Is the soil safe to grow vegetables in Niarada?
The federal record around Niarada is a meaningful one — 54 documented sites, mostly Mining entries (27), the nearest Nitrate record about 0.6 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 Niarada?
From about Sep 10 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Niarada's scale — its 6a band and its 164-day season. Your yard writes its own version of Niarada'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 Niarada’s own scale
6 of the readings below were taken at Niarada's own scale — its own ~164-day season between 28°F freezes, the 31,665 acres it covers and 54 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Niarada's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Niarada's own 28°F hard-freeze dates, about Apr 29 and Oct 10 and the ~164-day span between themNOAA 1991–2020 Climate Normals
- 54 documented contamination sites on the federal record near Niarada, the closest Nitrate record about 0.6 miles out from the town centreFederal environmental registers
- Niarada's boundary and the 31,665 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~164-day seasonGrowable Ground crop-matching engine
- Niarada sits in the Northern Rockies — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Niarada's 31,665 acres read through its county's SSURGO summaryfrom Flathead County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Flathead County
- The growing challenges every Montana grower plans around — written at state scale, so they stay on the state guidefrom Montana
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Flathead County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Niarada's 31,665 acreswhy one lot differs from the next →
- Which side of Niarada you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 31,665 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.6 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 Niarada-wide figureread your own land →
More in Montana
Growing region
Nearby growing guides