Kaycee, 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.
A short list that earns its place here — cabbage, cranberry, turkish rocket, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Kaycee, 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 Kaycee 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 Kaycee — soil, climate, flood, and parcel records. How we handle your address.
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Kaycee — the short answer
Kaycee, Wyoming: USDA zone 4b, about 155 days between hard freezes, across 281 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~155
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 281 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 Kaycee's average, not your lot's — a low corner or a tree line moves it. Against Kaycee's 155-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kaycee
Each reading below is measured for Kaycee itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredKaycee runs about 155 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
MeasuredKaycee 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 Kaycee is in
Kaycee sits in the Northwestern Great Plains — EPA Level III, inside the wider Great Plains. That is read at Kaycee's own centroid rather than borrowed from Johnson County.
What Grows in Kaycee
Every plant below cleared Kaycee's own zone 4b and its 155-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Kaycee?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 7 — 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 Kaycee
Closest first, within ~10 miles of Kaycee. Listing isn't leaking, and distance isn't exposure.
- 43-082-12ad 05Nitrate · 650 ft
- 43-082-12a 01Nitrate · 700 ft
- Reno FieldUnderground Storage Tanks · 700 ft
- Kaycee Radio Repeater 730681Underground Storage Tanks · 700 ft
- T. .D Taylor and Sons-Exxon ServiceUnderground Storage Tanks · 750 ft
- Kaycee StandardUnderground Storage Tanks · 1200 ft
- Kaycee County ShopUnderground Storage Tanks · 1200 ft
- Kaycee High SchoolUnderground Storage Tanks · 1400 ft
- 43-082-12aa 01Nitrate · 1400 ft
- Kaycee TexacoUnderground Storage Tanks · 1600 ft
- Kaycee OutpostUnderground Storage Tanks · 1600 ft
- 43-082-12b 01Nitrate · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kaycee'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 Kaycee.
Sources Checked
within ~10 miles of Kaycee
Severity Distribution
within ~10 miles of Kaycee
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kaycee, Nitrate runs higher than the national average — 32 sites within ~10 miles of Kaycee. 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 Kaycee
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 Kaycee average
Your land is one point inside Kaycee
Everything above resolves to Kaycee as a whole — one PHZM band and one 28°F frost record, read across 281 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 Kaycee Average
Kaycee Average
- ●USDA Zones 4b, averaged across Kaycee
- ●One soil character for all of Kaycee
- ●Frost dates read at Kaycee's scale: May 5 to Oct 7
YOUR Parcel
- ✓Your exact zone, not Kaycee's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kaycee
Pull a site-specific report for your exact address in Kaycee, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kaycee averages can't show:
We read public map data around Kaycee — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kaycee average
How we know this about Kaycee
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 Kaycee’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 Kaycee
When does frost risk typically end in Kaycee?
The last hard freeze (28°F) in Kaycee typically lands around May 5, 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 26.
When is the first frost in Kaycee?
The first hard freeze (28°F) in Kaycee typically arrives around Oct 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 23, so the watching starts about Sep 7 — about 155 days after the spring freeze cleared.
How long is the growing season in Kaycee?
Measured between 28°F hard freezes, Kaycee sees about 155 frost-free days — roughly May 5 through Oct 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 26 to Sep 23, about 120 days.
Is the soil safe to grow vegetables in Kaycee?
The federal record around Kaycee is light — 44 documented sites across the 9 federal source types we checked, mostly Nitrate entries (32), the nearest Nitrate record about 0.1 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 I protect my plants from frost in Kaycee?
From about Sep 7 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kaycee's scale — its 4b band and its 155-day season. Your yard writes its own version of Kaycee'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 Kaycee’s own scale
6 of the readings below were taken at Kaycee's own scale — its own ~155-day season between 28°F freezes, the 281 acres it covers and 44 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Kaycee's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Kaycee's own 28°F hard-freeze dates, about May 5 and Oct 7 and the ~155-day span between themNOAA 1991–2020 Climate Normals
- 44 documented contamination sites on the federal record near Kaycee, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- Kaycee's boundary and the 281 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~155-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kaycee's own centroid, the Northwestern Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Kaycee's 281 acres read through its county's SSURGO summaryfrom Johnson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Johnson 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 Johnson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kaycee's 281 acreswhy one lot differs from the next →
- Which side of Kaycee you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 281 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.1 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 Kaycee-wide figureread your own land →
More in Wyoming
Wider growing context
What grows across WyomingKaycee sits outside our named growing regions, so Wyoming as a whole is its closest context here.
Nearby growing guides