Sleeping Buffalo, Montana, sits in USDA hardiness zone 3b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
A short list that earns its place here — cabbage, cranberry, epazote, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Sleeping Buffalo, 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 Sleeping Buffalo 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 Sleeping Buffalo — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Sleeping Buffalo — the short answer
Sleeping Buffalo, Montana: USDA zone 3b, about 148 days between hard freezes, across 119 acres of town.
- USDA zone
- 3b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~148
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 119 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 3b is Sleeping Buffalo's average, not your lot's — a low corner or a tree line moves it. Against Sleeping Buffalo's 148-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Sleeping Buffalo
Each reading below is measured for Sleeping Buffalo itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSleeping Buffalo runs about 148 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
MeasuredSleeping Buffalo sits in USDA hardiness zone 3b.
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 Sleeping Buffalo is in
Sleeping Buffalo sits in the Northwestern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Sleeping Buffalo's own centroid rather than borrowed from Phillips County.
What Grows in Sleeping Buffalo
Every plant below cleared Sleeping Buffalo's own zone 3b and its 148-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Sleeping Buffalo?
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 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 29 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
What's on the federal record near Sleeping Buffalo
Closest first, within ~10 miles of Sleeping Buffalo. Listing isn't leaking, and distance isn't exposure.
- 32N32E35CDB 01Nitrate · 1200 ft
- SLEEPING BUFFALO HOT SPRINGS MGMT INCUnderground Storage Tanks · 1700 ft
- EZZIES SACO STATIONUnderground Storage Tanks · 4.7 mi
- 32N33E17DAD 01Nitrate · 5.0 mi
- 32N33E16BA 01Nitrate · 5.6 mi
- SACO DEHY INCBrownfields · 6.7 mi
- 32N33E25BCB 01Nitrate · 7.0 mi
- SACO DEHY INCUnderground Storage Tanks · 8.9 mi
- 32N34E29CCC 01Nitrate · 8.9 mi
- QWEST SACOUnderground Storage Tanks · 9.0 mi
- SACO CONOCOUnderground Storage Tanks · 9.0 mi
- S & R BARNARDSUnderground Storage Tanks · 9.2 mi
1 more site is on the record inside the same radius. See them on the map
Measured from Sleeping Buffalo'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 Sleeping Buffalo.
Sources Checked
within ~10 miles of Sleeping Buffalo
Severity Distribution
within ~10 miles of Sleeping Buffalo
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •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.
Check your specific parcel in Sleeping Buffalo
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 Sleeping Buffalo average
Your land is one point inside Sleeping Buffalo
Everything above resolves to Sleeping Buffalo as a whole — one PHZM band and one 28°F frost record, read across 119 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 Sleeping Buffalo Average
Sleeping Buffalo Average
- ●USDA Zones 3b, averaged across Sleeping Buffalo
- ●One soil character for all of Sleeping Buffalo
- ●Frost dates read at Sleeping Buffalo's scale: May 4 to Sep 29
YOUR Parcel
- ✓Your exact zone, not Sleeping Buffalo's 3b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Sleeping Buffalo
Pull a site-specific report for your exact address in Sleeping Buffalo, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Sleeping Buffalo averages can't show:
We read public map data around Sleeping Buffalo — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Sleeping Buffalo average
How we know this about Sleeping Buffalo
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 Sleeping Buffalo’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 Sleeping Buffalo
When does frost risk typically end in Sleeping Buffalo?
The last hard freeze (28°F) in Sleeping Buffalo typically lands around May 4, 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 25.
When is the first frost in Sleeping Buffalo?
The first hard freeze (28°F) in Sleeping Buffalo typically arrives around Sep 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 15, so the watching starts about Aug 30 — about 148 days after the spring freeze cleared.
How long is the growing season in Sleeping Buffalo?
Measured between 28°F hard freezes, Sleeping Buffalo sees about 148 frost-free days — roughly May 4 through Sep 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 25 to Sep 15, about 113 days.
Is the soil safe to grow vegetables in Sleeping Buffalo?
The federal record around Sleeping Buffalo is light — 19 documented sites across the 9 federal source types we checked, mostly Nitrate entries (12), the nearest Nitrate record about 0.2 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Sleeping Buffalo?
With about 148 frost-free days between hard freezes, Sleeping Buffalo 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 176 to 204 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 4 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Sleeping Buffalo's scale — its 3b band and its 148-day season. Your yard writes its own version of Sleeping Buffalo'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 Sleeping Buffalo’s own scale
6 of the readings below were taken at Sleeping Buffalo's own scale — its own ~148-day season between 28°F freezes, the 119 acres it covers and 19 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Sleeping Buffalo's own USDA hardiness band, zones 3bUSDA PHZM 2023
- Sleeping Buffalo's own 28°F hard-freeze dates, about May 4 and Sep 29 and the ~148-day span between themNOAA 1991–2020 Climate Normals
- 19 documented contamination sites on the federal record near Sleeping Buffalo, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Sleeping Buffalo's boundary and the 119 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 3b and a ~148-day seasonGrowable Ground crop-matching engine
- The ecoregion at Sleeping Buffalo's own centroid, the Northwestern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Sleeping Buffalo's 119 acres read through its county's SSURGO summaryfrom Phillips County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Phillips 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 Phillips County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Sleeping Buffalo's 119 acreswhy one lot differs from the next →
- Which side of Sleeping Buffalo you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 119 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.2 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 Sleeping Buffalo-wide figureread your own land →
More in Montana
Growing region
Nearby growing guides