Hall, Montana, sits in USDA hardiness zone 4b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, cranberry, cilantro, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Hall, 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 Hall 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 Hall — soil, climate, flood, and parcel records. How we handle your address.
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Hall — the short answer
Hall, Montana: USDA zone 4b, about 127 days between hard freezes, across 106 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~127
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 106 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 4b is Hall's average, not your lot's — a low corner or a tree line moves it. Against Hall's 127-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hall
Each reading below is measured for Hall itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHall runs about 127 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
MeasuredHall sits in USDA hardiness zone 4b.
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 Hall is in
Hall sits in the Middle Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Hall's own centroid rather than borrowed from Granite County.
What Grows in Hall
Every plant below cleared Hall's own zone 4b and its 127-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Hall?
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 17; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 19 — 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 Hall
Closest first, within ~10 miles of Hall. Listing isn't leaking, and distance isn't exposure.
- HOGANS RANCH & BUILDERS SUPPLYUnderground Storage Tanks · 500 ft
- 10N13W26DCCB01Nitrate · 500 ft
- 09N13W02CBBC01Nitrate · 1.7 mi
- 10N12W30BABD01Nitrate · 2.1 mi
- 10N12W31ACDA01Nitrate · 2.3 mi
- MDOT 11 2006 DRUMMOND SHOPUnderground Storage Tanks · 3.2 mi
- 10N13W12BDDA01Nitrate · 3.6 mi
- FOLEYS QUALITY SERVICE & SUPPLY USTUnderground Storage Tanks · 4.4 mi
- GRANITE COUNTY ROAD DEPT HALLUnderground Storage Tanks · 4.4 mi
- 10N12W09CADA01Nitrate · 5.2 mi
- Key-DurandMining · 5.2 mi
- 10N12W06BBAA01Nitrate · 5.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hall'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 Hall.
Sources Checked
within ~10 miles of Hall
Severity Distribution
within ~10 miles of Hall
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hall, Mining runs higher than the national average — 82 sites within ~10 miles of Hall. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Hall
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 Hall average
Your land is one point inside Hall
Everything above resolves to Hall as a whole — one PHZM band and one 28°F frost record, read across 106 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 Hall Average
Hall Average
- ●USDA Zones 4b, averaged across Hall
- ●One soil character for all of Hall
- ●Frost dates read at Hall's scale: May 15 to Sep 19
YOUR Parcel
- ✓Your exact zone, not Hall's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hall
Pull a site-specific report for your exact address in Hall, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hall averages can't show:
We read public map data around Hall — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hall average
How we know this about Hall
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 Hall’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 Hall
When does frost risk typically end in Hall?
The last hard freeze (28°F) in Hall typically lands around May 15, 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 Jun 5.
When is the first frost in Hall?
The first hard freeze (28°F) in Hall typically arrives around Sep 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 5, so the watching starts about Aug 20 — about 127 days after the spring freeze cleared.
How long is the growing season in Hall?
Measured between 28°F hard freezes, Hall sees about 127 frost-free days — roughly May 15 through Sep 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 5 to Sep 5, about 92 days.
Is the soil safe to grow vegetables in Hall?
The federal record around Hall runs heavier than most — 123 documented sites, mostly Mining entries (82), the nearest Underground Storage Tanks record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do gardeners stretch the season in Hall?
With about 127 frost-free days between hard freezes, Hall 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 155 to 183 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 15 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Hall's scale — its 4b band and its 127-day season. Your yard writes its own version of Hall'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 Hall’s own scale
6 of the readings below were taken at Hall's own scale — its own ~127-day season between 28°F freezes, the 106 acres it covers and 123 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hall's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Hall's own 28°F hard-freeze dates, about May 15 and Sep 19 and the ~127-day span between themNOAA 1991–2020 Climate Normals
- 123 documented contamination sites on the federal record near Hall, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Hall's boundary and the 106 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~127-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hall's own centroid, the Middle RockiesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hall's 106 acres read through its county's SSURGO summaryfrom Granite County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Granite 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 Granite County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hall's 106 acreswhy one lot differs from the next →
- Which side of Hall you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 106 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 Hall-wide figureread your own land →
More in Montana
Wider growing context
What grows across MontanaHall sits outside our named growing regions, so Montana as a whole is its closest context here.
Nearby growing guides