Horseshoe Bend, Idaho, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, pawpaw, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Horseshoe Bend, 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 Horseshoe Bend 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 Horseshoe Bend — soil, climate, flood, and parcel records. How we handle your address.
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Horseshoe Bend — the short answer
Horseshoe Bend, Idaho: USDA zone 7a, about 200 days between hard freezes, across 693 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~200
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 693 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 7a is Horseshoe Bend's average, not your lot's — a low corner or a tree line moves it. Against Horseshoe Bend's 200-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Horseshoe Bend
Each reading below is measured for Horseshoe Bend itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHorseshoe Bend runs about 200 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHorseshoe Bend sits in USDA hardiness zone 7a.
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 Horseshoe Bend is in
Horseshoe Bend sits in the Idaho Batholith — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Horseshoe Bend's own centroid rather than borrowed from Boise County.
What Grows in Horseshoe Bend
Every plant below cleared Horseshoe Bend's own zone 7a and its 200-day season. Each card opens that plant's Idaho profile. How we score.
Is it too late to plant in Horseshoe Bend?
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 Mar 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 28 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
What's on the federal record near Horseshoe Bend
Closest first, within ~10 miles of Horseshoe Bend. Listing isn't leaking, and distance isn't exposure.
- VALLEY VIEW CHEVRONUnderground Storage Tanks · 550 ft
- Ray's Corner MarketUnderground Storage Tanks · 550 ft
- BOISE CASCADE CORP.- HSBUnderground Storage Tanks · 1400 ft
- 07N 02E 34ABD1Nitrate · 0.6 mi
- Horseshoe Bend School District #73Underground Storage Tanks · 0.6 mi
- DON EDDY PROPERTYUnderground Storage Tanks · 0.8 mi
- 07N 02E 23CAC1Nitrate · 1.0 mi
- Mammoth ProspectMining · 1.1 mi
- DOUBLE DIAMOND RANCHUnderground Storage Tanks · 1.1 mi
- Osborne MineMining · 1.3 mi
- HANSON LOGGING COUnderground Storage Tanks · 1.7 mi
- CHEVRON STATIONUnderground Storage Tanks · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Horseshoe Bend'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 Horseshoe Bend.
Total Sites
107
within ~10 miles of Horseshoe Bend
Risk Level
High
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Horseshoe Bend
Severity Distribution
within ~10 miles of Horseshoe Bend
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Horseshoe Bend, Mining runs higher than the national average — 71 sites within ~10 miles of Horseshoe Bend. That's not a problem with your land — it's information about it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Horseshoe Bend
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 Horseshoe Bend average
Your land is one point inside Horseshoe Bend
Everything above resolves to Horseshoe Bend as a whole — one PHZM band and one 28°F frost record, read across 693 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 Horseshoe Bend Average
Horseshoe Bend Average
- ●USDA Zones 7a, averaged across Horseshoe Bend
- ●One soil character for all of Horseshoe Bend
- ●Frost dates read at Horseshoe Bend's scale: Apr 11 to Oct 28
YOUR Parcel
- ✓Your exact zone, not Horseshoe Bend's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Horseshoe Bend
Pull a site-specific report for your exact address in Horseshoe Bend, Idaho — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Horseshoe Bend averages can't show:
We read public map data around Horseshoe Bend — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Horseshoe Bend average
How we know this about Horseshoe Bend
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 Horseshoe Bend’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 Horseshoe Bend
When does frost risk typically end in Horseshoe Bend?
The last hard freeze (28°F) in Horseshoe Bend typically lands around Apr 11, 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 2.
When is the first frost in Horseshoe Bend?
The first hard freeze (28°F) in Horseshoe Bend typically arrives around Oct 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 14, so the watching starts about Sep 28 — about 200 days after the spring freeze cleared.
How long is the growing season in Horseshoe Bend?
Measured between 28°F hard freezes, Horseshoe Bend sees about 200 frost-free days — roughly Apr 11 through Oct 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 2 to Oct 14, about 165 days.
Is the soil safe to grow vegetables in Horseshoe Bend?
The federal record around Horseshoe Bend runs heavier than most — 107 documented sites, mostly Mining entries (71), the nearest Underground Storage Tanks record about 0.1 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Horseshoe Bend?
From about Sep 28 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Horseshoe Bend's scale — its 7a band and its 200-day season. Your yard writes its own version of Horseshoe Bend'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 Horseshoe Bend’s own scale
6 of the readings below were taken at Horseshoe Bend's own scale — its own ~200-day season between 28°F freezes, the 693 acres it covers and 107 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Horseshoe Bend's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Horseshoe Bend's own 28°F hard-freeze dates, about Apr 11 and Oct 28 and the ~200-day span between themNOAA 1991–2020 Climate Normals
- 107 documented contamination sites on the federal record near Horseshoe Bend, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Horseshoe Bend's boundary and the 693 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~200-day seasonGrowable Ground crop-matching engine
- The ecoregion at Horseshoe Bend's own centroid, the Idaho BatholithUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Horseshoe Bend's 693 acres read through its county's SSURGO summaryfrom Boise County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Boise 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 Boise County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Horseshoe Bend's 693 acreswhy one lot differs from the next →
- Which side of Horseshoe Bend you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 693 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Horseshoe Bend-wide figureread your own land →
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