Ten Sleep, Wyoming, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, cranberry, turkish rocket, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Ten Sleep, 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 Ten Sleep 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 Ten Sleep — soil, climate, flood, and parcel records. How we handle your address.
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Ten Sleep — the short answer
Ten Sleep, Wyoming: USDA zone 4b, about 167 days between hard freezes, across 120 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~167
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 120 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 Ten Sleep's average, not your lot's — a low corner or a tree line moves it. Against Ten Sleep's 167-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ten Sleep
Each reading below is measured for Ten Sleep itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredTen Sleep runs about 167 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
MeasuredTen Sleep 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 Ten Sleep is in
Ten Sleep sits in the Wyoming Basin — EPA Level III, inside the wider North American Deserts. That is read at Ten Sleep's own centroid rather than borrowed from Washakie County.
What Grows in Ten Sleep
Every plant below cleared Ten Sleep's own zone 4b and its 167-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Ten Sleep?
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 29; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 26 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 10 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Ten Sleep
Closest first, within ~10 miles of Ten Sleep. Listing isn't leaking, and distance isn't exposure.
- Pony ExpressUnderground Storage Tanks · 350 ft
- Circle S ServicesUnderground Storage Tanks · 400 ft
- Flagstaff CaféUnderground Storage Tanks · 400 ft
- (Former) Ten Sleep Red HorseUnderground Storage Tanks · 450 ft
- Canyon LodgeUnderground Storage Tanks · 450 ft
- 47-088-16cdb02Nitrate · 650 ft
- 47-088-16cdc02Nitrate · 800 ft
- 47-088-16cca01Nitrate · 900 ft
- 47-088-16cdc01Nitrate · 950 ft
- 48-088-28ccc02Nitrate · 1800 ft
- 47-088-16dba01Nitrate · 0.6 mi
- 47-088-21aba01Nitrate · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Ten Sleep'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 Ten Sleep.
Sources Checked
within ~10 miles of Ten Sleep
Severity Distribution
within ~10 miles of Ten Sleep
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ten Sleep, Nitrate runs higher than the national average — 76 sites within ~10 miles of Ten Sleep. That's not a problem with your land — it's information about 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 Ten Sleep
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 Ten Sleep average
Your land is one point inside Ten Sleep
Everything above resolves to Ten Sleep as a whole — one PHZM band and one 28°F frost record, read across 120 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 Ten Sleep Average
Ten Sleep Average
- ●USDA Zones 4b, averaged across Ten Sleep
- ●One soil character for all of Ten Sleep
- ●Frost dates read at Ten Sleep's scale: Apr 26 to Oct 10
YOUR Parcel
- ✓Your exact zone, not Ten Sleep's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ten Sleep
Pull a site-specific report for your exact address in Ten Sleep, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ten Sleep averages can't show:
We read public map data around Ten Sleep — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ten Sleep average
How we know this about Ten Sleep
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 Ten Sleep’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 Ten Sleep
When does frost risk typically end in Ten Sleep?
The last hard freeze (28°F) in Ten Sleep typically lands around Apr 26, 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 17.
When is the first frost in Ten Sleep?
The first hard freeze (28°F) in Ten Sleep typically arrives around Oct 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 26, so the watching starts about Sep 10 — about 167 days after the spring freeze cleared.
How long is the growing season in Ten Sleep?
Measured between 28°F hard freezes, Ten Sleep sees about 167 frost-free days — roughly Apr 26 through Oct 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 17 to Sep 26, about 132 days.
Is the soil safe to grow vegetables in Ten Sleep?
The federal record around Ten Sleep shows 88 documented sites, mostly Nitrate entries (76), the nearest Underground Storage Tanks record under a tenth of a mile out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Ten Sleep?
From about Sep 10 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ten Sleep's scale — its 4b band and its 167-day season. Your yard writes its own version of Ten Sleep'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 Ten Sleep’s own scale
6 of the readings below were taken at Ten Sleep's own scale — its own ~167-day season between 28°F freezes, the 120 acres it covers and 88 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ten Sleep's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Ten Sleep's own 28°F hard-freeze dates, about Apr 26 and Oct 10 and the ~167-day span between themNOAA 1991–2020 Climate Normals
- 88 documented contamination sites on the federal record near Ten Sleep, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Ten Sleep's boundary and the 120 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~167-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ten Sleep's own centroid, the Wyoming BasinUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Ten Sleep's 120 acres read through its county's SSURGO summaryfrom Washakie County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washakie 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 Washakie County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ten Sleep's 120 acreswhy one lot differs from the next →
- Which side of Ten Sleep you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 120 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Ten Sleep-wide figureread your own land →
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