Power, Montana, sits in USDA hardiness zone 4b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Power, 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 Power 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 Power — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Power — the short answer
Power, Montana: USDA zone 4b, about 159 days between hard freezes, across 959 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~159
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 959 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 Power's average, not your lot's — a low corner or a tree line moves it. Against Power's 159-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Power
Each reading below is measured for Power itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPower runs about 159 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
MeasuredPower 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 Power is in
Power sits in the Northwestern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Power's own centroid rather than borrowed from Teton County.
What Grows in Power
Every plant below cleared Power's own zone 4b and its 159-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Power?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 8 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Power
Closest first, within ~10 miles of Power. Listing isn't leaking, and distance isn't exposure.
- POWER PUBLIC SCHOOLSUnderground Storage Tanks · 0.9 mi
- BRUCE MAURER INCUnderground Storage Tanks · 0.9 mi
- POWER FARMERS ELEVATORUnderground Storage Tanks · 0.9 mi
- 22N01W10BBBB01Nitrate · 3.0 mi
- 23N01W03AAC 01Nitrate · 4.2 mi
- 23N01E28DADD01Nitrate · 4.6 mi
- 22N02W02DDDD01Nitrate · 6.0 mi
- WOODHOUSE PRODUCTS INCUnderground Storage Tanks · 6.1 mi
- HAGER BROTHERSUnderground Storage Tanks · 6.6 mi
- 22N02W24BABC01Nitrate · 7.0 mi
- MALMSTROM AFB J 11Underground Storage Tanks · 7.3 mi
- BN DUTTON DEPOTUnderground Storage Tanks · 7.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Power'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 Power.
Severity Distribution
within ~10 miles of Power
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Power, Nitrate runs higher than the national average — 34 sites within ~10 miles of Power. 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 Power
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 Power average
Your land is one point inside Power
Everything above resolves to Power as a whole — one PHZM band and one 28°F frost record, read across 959 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 Power Average
Power Average
- ●USDA Zones 4b, averaged across Power
- ●One soil character for all of Power
- ●Frost dates read at Power's scale: May 2 to Oct 8
YOUR Parcel
- ✓Your exact zone, not Power's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Power
Pull a site-specific report for your exact address in Power, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Power averages can't show:
We read public map data around Power — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Power average
How we know this about Power
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 Power’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 Power
When does frost risk typically end in Power?
The last hard freeze (28°F) in Power typically lands around May 2, 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 23.
When is the first frost in Power?
The first hard freeze (28°F) in Power typically arrives around Oct 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 24, so the watching starts about Sep 8 — about 159 days after the spring freeze cleared.
How long is the growing season in Power?
Measured between 28°F hard freezes, Power sees about 159 frost-free days — roughly May 2 through Oct 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 23 to Sep 24, about 124 days.
Is the soil safe to grow vegetables in Power?
The federal record around Power shows 53 documented sites, mostly Nitrate entries (34), the nearest Underground Storage Tanks record about 0.9 miles 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 Power?
From about Sep 8 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Power's scale — its 4b band and its 159-day season. Your yard writes its own version of Power'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 Power’s own scale
6 of the readings below were taken at Power's own scale — its own ~159-day season between 28°F freezes, the 959 acres it covers and 53 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Power's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Power's own 28°F hard-freeze dates, about May 2 and Oct 8 and the ~159-day span between themNOAA 1991–2020 Climate Normals
- 53 documented contamination sites on the federal record near Power, the closest Underground Storage Tanks record about 0.9 miles out from the town centreFederal environmental registers
- Power's boundary and the 959 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~159-day seasonGrowable Ground crop-matching engine
- The ecoregion at Power's own centroid, the Northwestern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Power's 959 acres read through its county's SSURGO summaryfrom Teton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Teton 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 Teton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Power's 959 acreswhy one lot differs from the next →
- Which side of Power you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 959 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.9 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 Power-wide figureread your own land →