Crowheart, Wyoming, sits in USDA hardiness zone 4b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, cranberry, cilantro, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Crowheart, 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 Crowheart 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 Crowheart — soil, climate, flood, and parcel records. How we handle your address.
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Crowheart — the short answer
Crowheart, Wyoming: USDA zone 4b, about 136 days between hard freezes, across 20K acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 14
- 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
- ~136
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 20K 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 Crowheart's average, not your lot's — a low corner or a tree line moves it. Against Crowheart's 136-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Crowheart
Each reading below is measured for Crowheart itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCrowheart runs about 136 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
MeasuredCrowheart 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 Crowheart is in
Crowheart sits in the Wyoming Basin — EPA Level III, inside the wider North American Deserts. That is read at Crowheart's own centroid rather than borrowed from Fremont County.
What Grows in Crowheart
Every plant below cleared Crowheart's own zone 4b and its 136-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Crowheart?
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 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 14 (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. 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 Crowheart
Closest first, within ~10 miles of Crowheart. Listing isn't leaking, and distance isn't exposure.
- 4N-04W-02cda01Nitrate · 1.6 mi
- 4N-04W-02dcb01Nitrate · 1.7 mi
- 4N-04W-22bbb02Nitrate · 1.8 mi
- 4N-04W-15dcd01Nitrate · 1.8 mi
- Crowheart SchoolUnderground Storage Tanks · 2.7 mi
- 4N-04W-23adc01Nitrate · 2.8 mi
- 4N-03W-08bbd01Nitrate · 4.2 mi
- 4N-03W-32baa01Nitrate · 5.8 mi
- 3N-3W-04aba01Nitrate · 7.4 mi
- Bull's ConocoUnderground Storage Tanks · 7.7 mi
- 6N-03W-33ccd01Nitrate · 9.0 mi
Measured from Crowheart'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 Crowheart.
Severity Distribution
within ~10 miles of Crowheart
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
Check your specific parcel in Crowheart
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 Crowheart average
Your land is one point inside Crowheart
Everything above resolves to Crowheart as a whole — one PHZM band and one 28°F frost record, read across 20K 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 Crowheart Average
Crowheart Average
- ●USDA Zones 4b, averaged across Crowheart
- ●One soil character for all of Crowheart
- ●Frost dates read at Crowheart's scale: May 14 to Sep 27
YOUR Parcel
- ✓Your exact zone, not Crowheart's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Crowheart
Pull a site-specific report for your exact address in Crowheart, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Crowheart averages can't show:
We read public map data around Crowheart — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Crowheart average
How we know this about Crowheart
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 Crowheart’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 Crowheart
When does frost risk typically end in Crowheart?
The last hard freeze (28°F) in Crowheart typically lands around May 14, 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 4.
When is the first frost in Crowheart?
The first hard freeze (28°F) in Crowheart 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 136 days after the spring freeze cleared.
How long is the growing season in Crowheart?
Measured between 28°F hard freezes, Crowheart sees about 136 frost-free days — roughly May 14 through Sep 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 4 to Sep 13, about 101 days.
Is the soil safe to grow vegetables in Crowheart?
The federal record around Crowheart is light — 20 documented sites across the 9 federal source types we checked, mostly Nitrate entries (18), the nearest Nitrate record about 1.6 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 Crowheart?
With about 136 frost-free days between hard freezes, Crowheart 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 164 to 192 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 14 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Crowheart's scale — its 4b band and its 136-day season. Your yard writes its own version of Crowheart'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 Crowheart’s own scale
6 of the readings below were taken at Crowheart's own scale — its own ~136-day season between 28°F freezes, the 20,127 acres it covers and 20 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Crowheart's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Crowheart's own 28°F hard-freeze dates, about May 14 and Sep 27 and the ~136-day span between themNOAA 1991–2020 Climate Normals
- 20 documented contamination sites on the federal record near Crowheart, the closest Nitrate record about 1.6 miles out from the town centreFederal environmental registers
- Crowheart's boundary and the 20,127 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~136-day seasonGrowable Ground crop-matching engine
- The ecoregion at Crowheart's own centroid, the Wyoming BasinUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Crowheart's 20,127 acres read through its county's SSURGO summaryfrom Fremont County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Fremont 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 Fremont County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Crowheart's 20,127 acreswhy one lot differs from the next →
- Which side of Crowheart you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 20,127 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.6 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 Crowheart-wide figureread your own land →
More in Wyoming
Wider growing context
What grows across WyomingCrowheart sits outside our named growing regions, so Wyoming as a whole is its closest context here.
Nearby growing guides