Weeksville, Montana, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit cabbage, blackberry, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Weeksville, 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 Weeksville 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 Weeksville — soil, climate, flood, and parcel records. How we handle your address.
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Weeksville — the short answer
Weeksville, Montana: USDA zone 6a, about 166 days between hard freezes, across 2K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~166
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 Weeksville's average, not your lot's — a low corner or a tree line moves it. Against Weeksville's 166-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Weeksville
Each reading below is measured for Weeksville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWeeksville runs about 166 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
MeasuredWeeksville 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 Weeksville is in
Weeksville sits in the Northern Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Weeksville's own centroid rather than borrowed from Sanders County.
What Grows in Weeksville
Every plant below cleared Weeksville's own zone 6a and its 166-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Weeksville?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 31; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 11 — 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 Weeksville
Closest first, within ~10 miles of Weeksville. Listing isn't leaking, and distance isn't exposure.
- 20N27W13DDCD01Nitrate · 3.6 mi
- PLAINS LANDFILLBrownfields · 4.4 mi
- Eddy Creek Block Claims 1 & 2Mining · 5.0 mi
- Coeur D' Alene Star MineMining · 5.3 mi
- Coeur D'Alene Star MineMining · 5.3 mi
- 20N26W15BAAD01Nitrate · 5.8 mi
- Mineronjou, Eddy and Russel GroupsMining · 6.0 mi
- 20N26W15ACAB01Nitrate · 6.0 mi
- Russell Group ProspectMining · 6.0 mi
- Eddy CreekMining · 6.1 mi
- Eddy Creek MineMining · 6.2 mi
- MDOT PLAINS SITEUnderground Storage Tanks · 6.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Weeksville'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 Weeksville.
Sources Checked
within ~10 miles of Weeksville
Severity Distribution
within ~10 miles of Weeksville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Weeksville, Mining runs higher than the national average — 25 sites within ~10 miles of Weeksville. 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.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Weeksville
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 Weeksville average
Your land is one point inside Weeksville
Everything above resolves to Weeksville as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Weeksville Average
Weeksville Average
- ●USDA Zones 6a, averaged across Weeksville
- ●One soil character for all of Weeksville
- ●Frost dates read at Weeksville's scale: Apr 28 to Oct 11
YOUR Parcel
- ✓Your exact zone, not Weeksville's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Weeksville
Pull a site-specific report for your exact address in Weeksville, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Weeksville averages can't show:
We read public map data around Weeksville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Weeksville average
How we know this about Weeksville
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 Weeksville’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 Weeksville
When does frost risk typically end in Weeksville?
The last hard freeze (28°F) in Weeksville typically lands around Apr 28, 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 19.
When is the first frost in Weeksville?
The first hard freeze (28°F) in Weeksville typically arrives around Oct 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 27, so the watching starts about Sep 11 — about 166 days after the spring freeze cleared.
How long is the growing season in Weeksville?
Measured between 28°F hard freezes, Weeksville sees about 166 frost-free days — roughly Apr 28 through Oct 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 19 to Sep 27, about 131 days.
Is the soil safe to grow vegetables in Weeksville?
The federal record around Weeksville is a meaningful one — 55 documented sites, mostly Mining entries (25), the nearest Nitrate record about 3.6 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 Weeksville?
From about Sep 11 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Weeksville's scale — its 6a band and its 166-day season. Your yard writes its own version of Weeksville'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 Weeksville’s own scale
6 of the readings below were taken at Weeksville's own scale — its own ~166-day season between 28°F freezes, the 1,862 acres it covers and 55 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Weeksville's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Weeksville's own 28°F hard-freeze dates, about Apr 28 and Oct 11 and the ~166-day span between themNOAA 1991–2020 Climate Normals
- 55 documented contamination sites on the federal record near Weeksville, the closest Nitrate record about 3.6 miles out from the town centreFederal environmental registers
- Weeksville's boundary and the 1,862 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~166-day seasonGrowable Ground crop-matching engine
- The ecoregion at Weeksville's own centroid, the Northern RockiesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Weeksville's 1,862 acres read through its county's SSURGO summaryfrom Sanders County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Sanders 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 Sanders County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Weeksville's 1,862 acreswhy one lot differs from the next →
- Which side of Weeksville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,862 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 3.6 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 Weeksville-wide figureread your own land →
More in Montana
Wider growing context
What grows across MontanaWeeksville sits outside our named growing regions, so Montana as a whole is its closest context here.
Nearby growing guides