Grant, Montana, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Expect cabbage, cranberry, cilantro, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Grant, 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 Grant 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 Grant — soil, climate, flood, and parcel records. How we handle your address.
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Grant — the short answer
Grant, Montana: USDA zone 4b, about 121 days between hard freezes, across 1K acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~121
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Grant's average, not your lot's — a low corner or a tree line moves it. Against Grant's 121-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Grant
Each reading below is measured for Grant itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGrant runs about 121 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
MeasuredGrant 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 Grant is in
Grant sits in the Middle Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Grant's own centroid rather than borrowed from Beaverhead County.
What Grows in Grant
Every plant below cleared Grant's own zone 4b and its 121-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Grant?
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 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 22 — 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 Grant
Closest first, within ~10 miles of Grant. Listing isn't leaking, and distance isn't exposure.
- 09S12W22DCBD01Nitrate · 1.7 mi
- 09S12W08ACDA01Nitrate · 4.3 mi
- 09S13W35ABCB01Nitrate · 4.6 mi
- 09S13W14DBAB01Nitrate · 5.3 mi
- 10S12W25AACB01Nitrate · 5.4 mi
- Cottontail GroupMining · 6.4 mi
- Peterson Flat SynclineMining · 6.5 mi
- Cedar Creek SynclineMining · 7.3 mi
- Henneberry Ridge SynclineMining · 9.2 mi
- 09S14W25DDCB01Nitrate · 9.3 mi
- Kissick Creek PropertyMining · 9.4 mi
- Lucky Strike MineMining · 9.8 mi
1 more site is on the record inside the same radius. See them on the map
Measured from Grant'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 Grant.
Total Sites
19
within ~10 miles of Grant
Risk Level
Low
Highest-severity
7 mining sites (prospects, none worked)
Severity Distribution
within ~10 miles of Grant
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Mine waste leaches heavy metals. Test for lead, arsenic and cadmium before growing food here.
Check your specific parcel in Grant
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 Grant average
Your land is one point inside Grant
Everything above resolves to Grant as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Grant Average
Grant Average
- ●USDA Zones 4b, averaged across Grant
- ●One soil character for all of Grant
- ●Frost dates read at Grant's scale: May 24 to Sep 22
YOUR Parcel
- ✓Your exact zone, not Grant's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Grant
Pull a site-specific report for your exact address in Grant, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Grant averages can't show:
We read public map data around Grant — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Grant average
How we know this about Grant
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 Grant’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 Grant
When does frost risk typically end in Grant?
The last hard freeze (28°F) in Grant typically lands around May 24, 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 14.
When is the first frost in Grant?
The first hard freeze (28°F) in Grant typically arrives around Sep 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 8, so the watching starts about Aug 23 — about 121 days after the spring freeze cleared.
How long is the growing season in Grant?
Measured between 28°F hard freezes, Grant sees about 121 frost-free days — roughly May 24 through Sep 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 14 to Sep 8, about 86 days.
Is the soil safe to grow vegetables in Grant?
The federal record around Grant is light — 19 documented sites across the 9 federal source types we checked, mostly Nitrate entries (12), the nearest Nitrate record about 1.7 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 Grant?
With about 121 frost-free days between hard freezes, Grant 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 149 to 177 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 24 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Grant's scale — its 4b band and its 121-day season. Your yard writes its own version of Grant'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 Grant’s own scale
6 of the readings below were taken at Grant's own scale — its own ~121-day season between 28°F freezes, the 1,120 acres it covers and 19 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Grant's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Grant's own 28°F hard-freeze dates, about May 24 and Sep 22 and the ~121-day span between themNOAA 1991–2020 Climate Normals
- 19 documented contamination sites on the federal record near Grant, the closest Nitrate record about 1.7 miles out from the town centreFederal environmental registers
- Grant's boundary and the 1,120 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~121-day seasonGrowable Ground crop-matching engine
- The ecoregion at Grant's own centroid, the Middle RockiesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Grant's 1,120 acres read through its county's SSURGO summaryfrom Beaverhead County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Beaverhead 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 Beaverhead County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Grant's 1,120 acreswhy one lot differs from the next →
- Which side of Grant you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,120 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.7 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 Grant-wide figureread your own land →
More in Montana
Wider growing context
What grows across MontanaGrant sits outside our named growing regions, so Montana as a whole is its closest context here.
Nearby growing guides