Weiser, Idaho, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, pawpaw, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Weiser, 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 Weiser 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 Weiser — soil, climate, flood, and parcel records. How we handle your address.
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Weiser — the short answer
Weiser, Idaho: USDA zone 7a, about 201 days between hard freezes, across 2K acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~201
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City 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 7a is Weiser's average, not your lot's — a low corner or a tree line moves it. Against Weiser's 201-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Weiser
Each reading below is measured for Weiser itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWeiser runs about 201 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
MeasuredWeiser 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 Weiser is in
Weiser sits in the Snake River Plain — EPA Level III, inside the wider North American Deserts. That is read at Weiser's own centroid rather than borrowed from Washington County.
What Grows in Weiser
Every plant below cleared Weiser's own zone 7a and its 201-day season. Each card opens that plant's Idaho profile. How we score.
Is it too late to plant in Weiser?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 24 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
What's on the federal record near Weiser
Closest first, within ~10 miles of Weiser. Listing isn't leaking, and distance isn't exposure.
- MIKES CLEANERSBrownfields · 150 ft
- BO'S BARNUnderground Storage Tanks · 250 ft
- WEISER STATIONUnderground Storage Tanks · 1000 ft
- DAWSON TRUCKING INCUnderground Storage Tanks · 1800 ft
- Johnson & BryantUnderground Storage Tanks · 1800 ft
- WEISER TOOL SHEDUnderground Storage Tanks · 1800 ft
- MCDANIEL CONSTRUCTIONUnderground Storage Tanks · 1800 ft
- 11N 05W 29CBB1Nitrate · 2000 ft
- TRI-Y SERVICEUnderground Storage Tanks · 2300 ft
- IDAHO TRANSPORTATION DEPTUnderground Storage Tanks · 2500 ft
- CLABBY MTR BUILDINGUnderground Storage Tanks · 2600 ft
- JAY'S SERVICE CENTERUnderground Storage Tanks · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Weiser'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 Weiser.
Total Sites
134
within ~10 miles of Weiser
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Weiser
Severity Distribution
within ~10 miles of Weiser
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Weiser, two things run higher than the national average within ~10 miles of Weiser — CAFO (3 sites) and Nitrate (76 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Weiser
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 Weiser average
Your land is one point inside Weiser
Everything above resolves to Weiser 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 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 Weiser Average
Weiser Average
- ●USDA Zones 7a, averaged across Weiser
- ●One soil character for all of Weiser
- ●Frost dates read at Weiser's scale: Apr 6 to Oct 24
YOUR Parcel
- ✓Your exact zone, not Weiser's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Weiser
Pull a site-specific report for your exact address in Weiser, Idaho — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Weiser averages can't show:
We read public map data around Weiser — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Weiser average
How we know this about Weiser
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 Weiser’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 Weiser
When does frost risk typically end in Weiser?
The last hard freeze (28°F) in Weiser typically lands around Apr 6, 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 Apr 27.
When is the first frost in Weiser?
The first hard freeze (28°F) in Weiser typically arrives around Oct 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 10, so the watching starts about Sep 24 — about 201 days after the spring freeze cleared.
How long is the growing season in Weiser?
Measured between 28°F hard freezes, Weiser sees about 201 frost-free days — roughly Apr 6 through Oct 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 27 to Oct 10, about 166 days.
Is the soil safe to grow vegetables in Weiser?
The federal record around Weiser is a meaningful one — 134 documented sites, mostly Nitrate entries (76), the nearest Brownfields record under a tenth of a mile 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 I protect my plants from frost in Weiser?
From about Sep 24 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Weiser's scale — its 7a band and its 201-day season. Your yard writes its own version of Weiser'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 Weiser’s own scale
6 of the readings below were taken at Weiser's own scale — its own ~201-day season between 28°F freezes, the 1,908 acres it covers and 134 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Weiser's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Weiser's own 28°F hard-freeze dates, about Apr 6 and Oct 24 and the ~201-day span between themNOAA 1991–2020 Climate Normals
- 134 documented contamination sites on the federal record near Weiser, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Weiser's boundary and the 1,908 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~201-day seasonGrowable Ground crop-matching engine
- The ecoregion at Weiser's own centroid, the Snake River PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Weiser's 1,908 acres read through its county's SSURGO summaryfrom Washington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washington 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 Washington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Weiser's 1,908 acreswhy one lot differs from the next →
- Which side of Weiser you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,908 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile 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 Weiser-wide figureread your own land →
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