Glendale Colony, Montana, sits in USDA hardiness zone 4a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, cranberry, cilantro, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Glendale Colony, 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 Glendale Colony 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 Glendale Colony — soil, climate, flood, and parcel records. How we handle your address.
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Glendale Colony — the short answer
Glendale Colony, Montana: USDA zone 4a, about 143 days between hard freezes, across 236 acres of town.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~143
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 236 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 4a is Glendale Colony's average, not your lot's — a low corner or a tree line moves it. Against Glendale Colony's 143-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glendale Colony
Each reading below is measured for Glendale Colony itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlendale Colony runs about 143 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
MeasuredGlendale Colony sits in USDA hardiness zone 4a.
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 Glendale Colony is in
Glendale Colony sits in the Northwestern Glaciated Plains — EPA Level III, inside the wider Great Plains. That is read at Glendale Colony's own centroid rather than borrowed from Glacier County.
What Grows in Glendale Colony
Every plant below cleared Glendale Colony's own zone 4a and its 143-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Glendale Colony?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 27 — 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 Glendale Colony
Closest first, within ~10 miles of Glendale Colony. Listing isn't leaking, and distance isn't exposure.
- GLENDALE COLONYCAFO · 0.5 mi
- FRANK & FAY MANLEYUnderground Storage Tanks · 2.7 mi
- 35N07W16AADD01Nitrate · 3.4 mi
- 34N07W06ABAA01Nitrate · 7.1 mi
- 35N06W21CB 01Nitrate · 7.8 mi
- 36N09W12DDBB01Nitrate · 8.5 mi
- ZENITH COLONY - CAFOCAFO · 9.4 mi
- SEVILLE COLONYCAFO · 9.6 mi
- SEVILLE COLONYBrownfields · 9.6 mi
- BIG SKY COLONY CAFO/AFOCAFO · 9.6 mi
- 35N06W23CD 01Nitrate · 9.9 mi
Measured from Glendale Colony'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 Glendale Colony.
Total Sites
16
within ~10 miles of Glendale Colony
Risk Level
Low
Highest-severity
4 concentrated animal feeding operations
Sources Checked
within ~10 miles of Glendale Colony
Severity Distribution
within ~10 miles of Glendale Colony
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Large animal operations push nitrates and bacteria downstream. Below one, test your water.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Glendale Colony
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 Glendale Colony average
Your land is one point inside Glendale Colony
Everything above resolves to Glendale Colony as a whole — one PHZM band and one 28°F frost record, read across 236 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 Glendale Colony Average
Glendale Colony Average
- ●USDA Zones 4a, averaged across Glendale Colony
- ●One soil character for all of Glendale Colony
- ●Frost dates read at Glendale Colony's scale: May 7 to Sep 27
YOUR Parcel
- ✓Your exact zone, not Glendale Colony's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glendale Colony
Pull a site-specific report for your exact address in Glendale Colony, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glendale Colony averages can't show:
We read public map data around Glendale Colony — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glendale Colony average
How we know this about Glendale Colony
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 Glendale Colony’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 Glendale Colony
When does frost risk typically end in Glendale Colony?
The last hard freeze (28°F) in Glendale Colony typically lands around May 7, 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 28.
When is the first frost in Glendale Colony?
The first hard freeze (28°F) in Glendale Colony typically arrives around Sep 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 13, so the watching starts about Aug 28 — about 143 days after the spring freeze cleared.
How long is the growing season in Glendale Colony?
Measured between 28°F hard freezes, Glendale Colony sees about 143 frost-free days — roughly May 7 through Sep 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 28 to Sep 13, about 108 days.
Is the soil safe to grow vegetables in Glendale Colony?
The federal record around Glendale Colony is light — 16 documented sites across the 9 federal source types we checked, mostly Nitrate entries (10), the nearest CAFO record about 0.5 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 Glendale Colony?
With about 143 frost-free days between hard freezes, Glendale Colony 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 171 to 199 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 7 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Glendale Colony's scale — its 4a band and its 143-day season. Your yard writes its own version of Glendale Colony'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 Glendale Colony’s own scale
6 of the readings below were taken at Glendale Colony's own scale — its own ~143-day season between 28°F freezes, the 236 acres it covers and 16 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glendale Colony's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Glendale Colony's own 28°F hard-freeze dates, about May 7 and Sep 27 and the ~143-day span between themNOAA 1991–2020 Climate Normals
- 16 documented contamination sites on the federal record near Glendale Colony, the closest CAFO record about 0.5 miles out from the town centreFederal environmental registers
- Glendale Colony's boundary and the 236 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~143-day seasonGrowable Ground crop-matching engine
- The ecoregion at Glendale Colony's own centroid, the Northwestern Glaciated PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glendale Colony's 236 acres read through its county's SSURGO summaryfrom Glacier County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Glacier 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 Glacier County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glendale Colony's 236 acreswhy one lot differs from the next →
- Which side of Glendale Colony you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 236 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest CAFO record about 0.5 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 Glendale Colony-wide figureread your own land →