Tetonia, Idaho, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include cabbage, cranberry, cilantro, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Tetonia, 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 Tetonia 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 Tetonia — soil, climate, flood, and parcel records. How we handle your address.
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Tetonia — the short answer
Tetonia, Idaho: USDA zone 4b, about 131 days between hard freezes, across 365 acres of city.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~131
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 365 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 Tetonia's average, not your lot's — a low corner or a tree line moves it. Against Tetonia's 131-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Tetonia
Each reading below is measured for Tetonia itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredTetonia runs about 131 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
MeasuredTetonia 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 Tetonia is in
Tetonia sits in the Snake River Plain — EPA Level III, inside the wider North American Deserts. That is read at Tetonia's own centroid rather than borrowed from Teton County.
What Grows in Tetonia
Every plant below cleared Tetonia's own zone 4b and its 131-day season. Each card opens that plant's Idaho profile. How we score.
Is it too late to plant in Tetonia?
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 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 25 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
What's on the federal record near Tetonia
Closest first, within ~10 miles of Tetonia. Listing isn't leaking, and distance isn't exposure.
- Grand View General StoreUnderground Storage Tanks · 800 ft
- 06N 45E 28BBC1Nitrate · 2400 ft
- 06N 45E 33CCC1Nitrate · 1.2 mi
- 06N 45E 19DDCC1Nitrate · 1.5 mi
- 06N 45E 34BDA1Nitrate · 1.5 mi
- TETONIA RESEARCH & EXTENSION CENTERUnderground Storage Tanks · 2.1 mi
- 06N 45E 34DDDC1Nitrate · 2.2 mi
- 06N 44E 36ABD1Nitrate · 2.5 mi
- 06N 45E 23BAA1Nitrate · 2.8 mi
- TETONIA ELEMENTRY SCHOOLUnderground Storage Tanks · 2.8 mi
- TETONIA STATIONUnderground Storage Tanks · 2.8 mi
- BADGER CREEKUnderground Storage Tanks · 2.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Tetonia'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 Tetonia.
Sources Checked
within ~10 miles of Tetonia
Severity Distribution
within ~10 miles of Tetonia
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Tetonia, Nitrate runs higher than the national average — 106 sites within ~10 miles of Tetonia. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Tetonia
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 Tetonia average
Your land is one point inside Tetonia
Everything above resolves to Tetonia as a whole — one PHZM band and one 28°F frost record, read across 365 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 city 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 Tetonia Average
Tetonia Average
- ●USDA Zones 4b, averaged across Tetonia
- ●One soil character for all of Tetonia
- ●Frost dates read at Tetonia's scale: May 17 to Sep 25
YOUR Parcel
- ✓Your exact zone, not Tetonia's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Tetonia
Pull a site-specific report for your exact address in Tetonia, Idaho — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Tetonia averages can't show:
We read public map data around Tetonia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Tetonia average
How we know this about Tetonia
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Tetonia’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 city grain anywhere on this page — there is no city-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 Tetonia
When does frost risk typically end in Tetonia?
The last hard freeze (28°F) in Tetonia typically lands around May 17, 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 7.
When is the first frost in Tetonia?
The first hard freeze (28°F) in Tetonia typically arrives around Sep 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 11, so the watching starts about Aug 26 — about 131 days after the spring freeze cleared.
How long is the growing season in Tetonia?
Measured between 28°F hard freezes, Tetonia sees about 131 frost-free days — roughly May 17 through Sep 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 7 to Sep 11, about 96 days.
Is the soil safe to grow vegetables in Tetonia?
The federal record around Tetonia shows 131 documented sites, mostly Nitrate entries (106), the nearest Underground Storage Tanks record about 0.2 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 Tetonia?
With about 131 frost-free days between hard freezes, Tetonia 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 159 to 187 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 17 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Tetonia's scale — its 4b band and its 131-day season. Your yard writes its own version of Tetonia'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 Tetonia’s own scale
6 of the readings below were taken at Tetonia's own scale — its own ~131-day season between 28°F freezes, the 365 acres it covers and 131 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Tetonia's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Tetonia's own 28°F hard-freeze dates, about May 17 and Sep 25 and the ~131-day span between themNOAA 1991–2020 Climate Normals
- 131 documented contamination sites on the federal record near Tetonia, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Tetonia's boundary and the 365 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~131-day seasonGrowable Ground crop-matching engine
- The ecoregion at Tetonia's own centroid, the Snake River PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Tetonia's 365 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 Idaho grower plans around — written at state scale, so they stay on the state guidefrom Idaho
- 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 Tetonia's 365 acreswhy one lot differs from the next →
- Which side of Tetonia you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 365 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Tetonia-wide figureread your own land →