Kelly, Wyoming, sits in USDA hardiness zone 4a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Among the crops suited to this profile: zucchini, cranberry, cilantro, and okra. The site-level story — soil, sun, drainage — decides the rest.
Even in Kelly, 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 Kelly 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 Kelly — soil, climate, flood, and parcel records. How we handle your address.
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Kelly — the short answer
Kelly, Wyoming: USDA zone 4a, about 99 days between hard freezes, across 271 acres of town.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jun 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~99
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 271 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 4a is Kelly's average, not your lot's — a low corner or a tree line moves it. Against Kelly's 99-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kelly
Each reading below is measured for Kelly itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredKelly runs about 99 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
MeasuredKelly sits in USDA hardiness zone 4a.
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 Kelly is in
Kelly sits in the Middle Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Kelly's own centroid rather than borrowed from Teton County.
What Grows in Kelly
Every plant below cleared Kelly's own zone 4a and its 99-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Kelly?
Almost never — the real question is what to plant next. Cool-season crops can go in from around May 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jun 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 8 — long-season crops need about 90 days of runway, quick greens only 30. Short seasons reward decisiveness — quick-maturing varieties late, hardy greens under cover, and next year’s garlic in the ground before it closes.
What's on the federal record near Kelly
Closest first, within ~10 miles of Kelly. Listing isn't leaking, and distance isn't exposure.
- Glenn B. Taylor RanchUnderground Storage Tanks · 1900 ft
- 42-115-11acc01Nitrate · 1.0 mi
- 42N 115W 09BDB1Nitrate · 1.3 mi
- 42-115-11aad01Nitrate · 1.4 mi
- 42-115-08daa02Nitrate · 1.7 mi
- 42-115-08daa01Nitrate · 1.7 mi
- 42-115-08dac01Nitrate · 1.8 mi
- 42-115-08dab02Nitrate · 1.8 mi
- 42-115-08dab01Nitrate · 1.9 mi
- 43N 115W 29DAD1Nitrate · 3.0 mi
- Teton Science SchoolUnderground Storage Tanks · 3.4 mi
- Dornan'sUnderground Storage Tanks · 4.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kelly'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 Kelly.
Total Sites
109
within ~10 miles of Kelly
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Kelly
Severity Distribution
within ~10 miles of Kelly
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kelly, Nitrate runs higher than the national average — 82 sites within ~10 miles of Kelly. 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 Kelly
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 Kelly average
Your land is one point inside Kelly
Everything above resolves to Kelly as a whole — one PHZM band and one 28°F frost record, read across 271 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 Kelly Average
Kelly Average
- ●USDA Zones 4a, averaged across Kelly
- ●One soil character for all of Kelly
- ●Frost dates read at Kelly's scale: Jun 1 to Sep 8
YOUR Parcel
- ✓Your exact zone, not Kelly's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kelly
Pull a site-specific report for your exact address in Kelly, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kelly averages can't show:
We read public map data around Kelly — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kelly average
How we know this about Kelly
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 Kelly’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 Kelly
When does frost risk typically end in Kelly?
The last hard freeze (28°F) in Kelly typically lands around Jun 1, 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 22.
When is the first frost in Kelly?
The first hard freeze (28°F) in Kelly typically arrives around Sep 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Aug 25, so the watching starts about Aug 9 — about 99 days after the spring freeze cleared.
How long is the growing season in Kelly?
Measured between 28°F hard freezes, Kelly sees about 99 frost-free days — roughly Jun 1 through Sep 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 22 to Aug 25, about 64 days.
Is the soil safe to grow vegetables in Kelly?
The federal record around Kelly shows 109 documented sites, mostly Nitrate entries (82), the nearest Underground Storage Tanks record about 0.4 miles 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 gardeners stretch the season in Kelly?
With about 99 frost-free days between hard freezes, Kelly 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 127 to 155 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the Jun 1 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Kelly's scale — its 4a band and its 99-day season. Your yard writes its own version of Kelly'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 Kelly’s own scale
6 of the readings below were taken at Kelly's own scale — its own ~99-day season between 28°F freezes, the 271 acres it covers and 109 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Kelly's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Kelly's own 28°F hard-freeze dates, about Jun 1 and Sep 8 and the ~99-day span between themNOAA 1991–2020 Climate Normals
- 109 documented contamination sites on the federal record near Kelly, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Kelly's boundary and the 271 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~99-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kelly's own centroid, the Middle RockiesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Kelly's 271 acres read through its county's SSURGO summaryfrom Teton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Teton 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 Teton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kelly's 271 acreswhy one lot differs from the next →
- Which side of Kelly you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 271 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 Kelly-wide figureread your own land →