Auburn, Wyoming, sits in USDA hardiness zone 4b — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit okra, cranberry, cilantro, and zucchini — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Auburn, 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 Auburn 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 Auburn — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Auburn — the short answer
Auburn, Wyoming: USDA zone 4b, about 115 days between hard freezes, across 2K acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~115
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 Auburn's average, not your lot's — a low corner or a tree line moves it. Against Auburn's 115-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Auburn
Each reading below is measured for Auburn itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAuburn runs about 115 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
MeasuredAuburn 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 Auburn is in
Auburn sits in the Middle Rockies — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Auburn'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 Auburn
Every plant below cleared Auburn's own zone 4b and its 115-day season. Each card opens that plant's Wyoming profile. How we score.
Is it too late to plant in Auburn?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 17 — 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 Auburn
Closest first, within ~10 miles of Auburn. Listing isn't leaking, and distance isn't exposure.
- 32-119-04bba01Nitrate · 0.7 mi
- 33-119-35dac01Nitrate · 1.2 mi
- 33-119-35adc01Nitrate · 1.3 mi
- 32-119-16dba01Nitrate · 3.1 mi
- 32-119-16dbd01Nitrate · 3.1 mi
- 32-119-16dbd02Nitrate · 3.2 mi
- 33-118-31ddc01Nitrate · 3.2 mi
- 33-118-30dbd01Nitrate · 3.3 mi
- 32-119-21aac01Nitrate · 3.6 mi
- FREEDOM ARMS INCToxics Release Inventory · 3.7 mi
- STAR VALLEY DRINKING WATER INCIDENTSuperfund · 3.8 mi
- WY Department of TransportationUnderground Storage Tanks · 3.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Auburn'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 Auburn.
Total Sites
101
within ~10 miles of Auburn
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Auburn
Severity Distribution
within ~10 miles of Auburn
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Auburn, Nitrate runs higher than the national average — 44 sites within ~10 miles of Auburn. 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 Auburn
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 Auburn average
Your land is one point inside Auburn
Everything above resolves to Auburn as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Auburn Average
Auburn Average
- ●USDA Zones 4b, averaged across Auburn
- ●One soil character for all of Auburn
- ●Frost dates read at Auburn's scale: May 25 to Sep 17
YOUR Parcel
- ✓Your exact zone, not Auburn's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Auburn
Pull a site-specific report for your exact address in Auburn, Wyoming — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Auburn averages can't show:
We read public map data around Auburn — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Auburn average
How we know this about Auburn
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 Auburn’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 Auburn
When does frost risk typically end in Auburn?
The last hard freeze (28°F) in Auburn typically lands around May 25, 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 15.
When is the first frost in Auburn?
The first hard freeze (28°F) in Auburn typically arrives around Sep 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 3, so the watching starts about Aug 18 — about 115 days after the spring freeze cleared.
How long is the growing season in Auburn?
Measured between 28°F hard freezes, Auburn sees about 115 frost-free days — roughly May 25 through Sep 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 15 to Sep 3, about 80 days.
Is the soil safe to grow vegetables in Auburn?
The federal record around Auburn is a meaningful one — 101 documented sites, mostly Nitrate entries (44), the nearest Nitrate record about 0.7 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do gardeners stretch the season in Auburn?
With about 115 frost-free days between hard freezes, Auburn 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 143 to 171 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 25 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Auburn's scale — its 4b band and its 115-day season. Your yard writes its own version of Auburn'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 Auburn’s own scale
6 of the readings below were taken at Auburn's own scale — its own ~115-day season between 28°F freezes, the 2,342 acres it covers and 101 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Auburn's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Auburn's own 28°F hard-freeze dates, about May 25 and Sep 17 and the ~115-day span between themNOAA 1991–2020 Climate Normals
- 101 documented contamination sites on the federal record near Auburn, the closest Nitrate record about 0.7 miles out from the town centreFederal environmental registers
- Auburn's boundary and the 2,342 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~115-day seasonGrowable Ground crop-matching engine
- Auburn 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 Auburn's 2,342 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 Auburn's 2,342 acreswhy one lot differs from the next →
- Which side of Auburn you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,342 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.7 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 Auburn-wide figureread your own land →
More in Wyoming
Growing region
Nearby growing guides