Alpine Northwest, Wyoming, sits in USDA hardiness zone 5a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
The conditions favor cabbage, cranberry, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Alpine Northwest, 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 Alpine Northwest 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 Alpine Northwest — soil, climate, flood, and parcel records. How we handle your address.
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Alpine Northwest — the short answer
Alpine Northwest, Wyoming: USDA zone 5a, about 126 days between hard freezes, across 758 acres of town.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 19
- 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
- ~126
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 758 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 Alpine Northwest's average, not your lot's — a low corner or a tree line moves it. Against Alpine Northwest's 126-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Alpine Northwest
Each reading below is measured for Alpine Northwest itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAlpine Northwest runs about 126 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
MeasuredAlpine Northwest 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 Alpine Northwest is in
Alpine Northwest sits in the Middle Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Alpine Northwest's own centroid, and it is not what its county reads: Lincoln County is mostly Wyoming Basin. The wider page above you is answering a different question about different ground.
What Grows in Alpine Northwest
Every plant below cleared Alpine Northwest's own zone 5a and its 126-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Alpine Northwest?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 19 (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. When the window is tight, the fall moves are quick ones — baby greens, radishes, and garlic set for next season.
What's on the federal record near Alpine Northwest
Closest first, within ~10 miles of Alpine Northwest. Listing isn't leaking, and distance isn't exposure.
- Alpine Airport Fueling FacilityUnderground Storage Tanks · 0.6 mi
- 37-118-19dca01Nitrate · 0.6 mi
- 37-118-20cba01Nitrate · 0.8 mi
- KJ's Alpine (Former Boardwalk Market)Underground Storage Tanks · 1.2 mi
- 37-118-20daa01Nitrate · 1.5 mi
- Delgado Oil Company, Inc.Underground Storage Tanks · 1.6 mi
- Rim StationUnderground Storage Tanks · 1.6 mi
- Leavitt Lumber CompanyUnderground Storage Tanks · 1.6 mi
- Kibbie CompoundUnderground Storage Tanks · 1.6 mi
- Alpine StandardUnderground Storage Tanks · 1.6 mi
- PalisportUnderground Storage Tanks · 1.6 mi
- Alpine Post officeUnderground Storage Tanks · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Alpine Northwest'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 Alpine Northwest.
Sources Checked
within ~10 miles of Alpine Northwest
Severity Distribution
within ~10 miles of Alpine Northwest
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Alpine Northwest, Nitrate runs higher than the national average — 22 sites within ~10 miles of Alpine Northwest. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Alpine Northwest
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 Alpine Northwest average
Your land is one point inside Alpine Northwest
Everything above resolves to Alpine Northwest as a whole — one PHZM band and one 28°F frost record, read across 758 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 Alpine Northwest Average
Alpine Northwest Average
- ●USDA Zones 5a, averaged across Alpine Northwest
- ●One soil character for all of Alpine Northwest
- ●Frost dates read at Alpine Northwest's scale: May 19 to Sep 22
YOUR Parcel
- ✓Your exact zone, not Alpine Northwest's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Alpine Northwest
Pull a site-specific report for your exact address in Alpine Northwest, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Alpine Northwest averages can't show:
We read public map data around Alpine Northwest — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Alpine Northwest average
How we know this about Alpine Northwest
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 Alpine Northwest’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 Alpine Northwest
When does frost risk typically end in Alpine Northwest?
The last hard freeze (28°F) in Alpine Northwest typically lands around May 19, 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 9.
When is the first frost in Alpine Northwest?
The first hard freeze (28°F) in Alpine Northwest 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 126 days after the spring freeze cleared.
How long is the growing season in Alpine Northwest?
Measured between 28°F hard freezes, Alpine Northwest sees about 126 frost-free days — roughly May 19 through Sep 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 9 to Sep 8, about 91 days.
Is the soil safe to grow vegetables in Alpine Northwest?
The federal record around Alpine Northwest is light — 37 documented sites across the 9 federal source types we checked, mostly Nitrate entries (22), the nearest Underground Storage Tanks record about 0.6 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 Alpine Northwest?
With about 126 frost-free days between hard freezes, Alpine Northwest 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 154 to 182 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 19 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Alpine Northwest's scale — its 5a band and its 126-day season. Your yard writes its own version of Alpine Northwest'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 Alpine Northwest’s own scale
6 of the readings below were taken at Alpine Northwest's own scale — its own ~126-day season between 28°F freezes, the 758 acres it covers and 37 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Alpine Northwest's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Alpine Northwest's own 28°F hard-freeze dates, about May 19 and Sep 22 and the ~126-day span between themNOAA 1991–2020 Climate Normals
- 37 documented contamination sites on the federal record near Alpine Northwest, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Alpine Northwest's boundary and the 758 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~126-day seasonGrowable Ground crop-matching engine
- Alpine Northwest sits in the Middle Rockies — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Alpine Northwest's 758 acres read through its county's SSURGO summaryfrom Lincoln County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lincoln County
- The growing challenges every Wyoming grower plans around — written at state scale, so they stay on the state guidefrom Wyoming
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Lincoln County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Alpine Northwest's 758 acreswhy one lot differs from the next →
- Which side of Alpine Northwest you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 758 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 Alpine Northwest-wide figureread your own land →
More in Wyoming
Wider growing context
What grows across WyomingAlpine Northwest sits outside our named growing regions, so Wyoming as a whole is its closest context here.
Nearby growing guides