Essex, Montana, sits in USDA hardiness zone 5a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, cranberry, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Essex, 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 Essex 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 Essex — soil, climate, flood, and parcel records. How we handle your address.
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Essex — the short answer
Essex, Montana: USDA zone 5a, about 143 days between hard freezes, across 332 acres of town.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 9
- 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
- ~143
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 332 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 5a is Essex's average, not your lot's — a low corner or a tree line moves it. Against Essex's 143-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Essex
Each reading below is measured for Essex itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredEssex 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
MeasuredEssex sits in USDA hardiness zone 5a.
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 Essex is in
Essex sits in the Canadian Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Essex's own centroid rather than borrowed from Flathead County.
What Grows in Essex
Every plant below cleared Essex's own zone 5a and its 143-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Essex?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Apr 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 9 (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. Even here the calendar’s edges hold value: thirty-day greens late in the window, then garlic and a rested bed for spring.
What's on the federal record near Essex
Closest first, within ~10 miles of Essex. Listing isn't leaking, and distance isn't exposure.
- IZAAK WALTON INNUnderground Storage Tanks · 2100 ft
- LippincottMining · 4.3 mi
- OkedaleMining · 4.3 mi
- Great NorthernMining · 4.3 mi
- HALF WAY HOUSEUnderground Storage Tanks · 4.5 mi
- STANTON CREEK LODGE CLOSEDUnderground Storage Tanks · 4.5 mi
- BN ESSEXUnderground Storage Tanks · 4.5 mi
- DENNYS UNDERPASS USTUnderground Storage Tanks · 6.0 mi
- Felix Creek ProspectsMining · 7.4 mi
- Unawah Creek ProspectsMining · 7.7 mi
- Unnamed Copper & GoldMining · 8.0 mi
- Stanton Lake ProspectsMining · 9.4 mi
Measured from Essex'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 Essex.
Severity Distribution
within ~10 miles of Essex
Highest-Severity Sites
Know Before You Grow
- •Mine waste leaches heavy metals. Test for lead, arsenic and cadmium before growing food here.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
Check your specific parcel in Essex
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 Essex average
Your land is one point inside Essex
Everything above resolves to Essex as a whole — one PHZM band and one 28°F frost record, read across 332 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 Essex Average
Essex Average
- ●USDA Zones 5a, averaged across Essex
- ●One soil character for all of Essex
- ●Frost dates read at Essex's scale: May 9 to Sep 29
YOUR Parcel
- ✓Your exact zone, not Essex's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Essex
Pull a site-specific report for your exact address in Essex, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Essex averages can't show:
We read public map data around Essex — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Essex average
How we know this about Essex
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 Essex’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 Essex
When does frost risk typically end in Essex?
The last hard freeze (28°F) in Essex typically lands around May 9, 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 30.
When is the first frost in Essex?
The first hard freeze (28°F) in Essex 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 143 days after the spring freeze cleared.
How long is the growing season in Essex?
Measured between 28°F hard freezes, Essex sees about 143 frost-free days — roughly May 9 through Sep 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 30 to Sep 15, about 108 days.
Is the soil safe to grow vegetables in Essex?
The federal record around Essex is light — 12 documented sites across the 9 federal source types we checked, mostly Mining entries (7), the nearest Underground Storage Tanks record about 0.4 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 Essex?
With about 143 frost-free days between hard freezes, Essex 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 9 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Essex's scale — its 5a band and its 143-day season. Your yard writes its own version of Essex'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 Essex’s own scale
6 of the readings below were taken at Essex's own scale — its own ~143-day season between 28°F freezes, the 332 acres it covers and 12 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Essex's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Essex's own 28°F hard-freeze dates, about May 9 and Sep 29 and the ~143-day span between themNOAA 1991–2020 Climate Normals
- 12 documented contamination sites on the federal record near Essex, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Essex's boundary and the 332 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~143-day seasonGrowable Ground crop-matching engine
- The ecoregion at Essex's own centroid, the Canadian RockiesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Essex's 332 acres read through its county's SSURGO summaryfrom Flathead County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Flathead 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 Flathead County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Essex's 332 acreswhy one lot differs from the next →
- Which side of Essex you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 332 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Essex-wide figureread your own land →