Grants Pass, Oregon, sits in USDA hardiness zone 8b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — kale, douglas fir, garlic, and hazelnut — with any one site's soil, sun, and drainage making the final cut.
Even in Grants Pass, 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 Grants Pass 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 Grants Pass — soil, climate, flood, and parcel records. How we handle your address.
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Grants Pass — the short answer
Grants Pass, Oregon: USDA zone 8b, about 199 days between hard freezes, across 7K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 14
- Josephine County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Oct 30
- Josephine County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~199
- Josephine County normal — NOAA 1991–2020, nearest to this town
- City area
- 7K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Josephine County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Grants Pass's average, not your lot's — a low corner or a tree line moves it. Against Grants Pass's 199-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Grants Pass
Each reading below is measured for Grants Pass itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsGrants Pass runs about 199 days between hard freezes (read from Josephine County, the closest normal to Grants Pass) — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredGrants Pass sits in USDA hardiness zone 8b.
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 Grants Pass is in
Grants Pass sits in the Klamath Mountains/California High North Coast Range — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Grants Pass's own centroid rather than borrowed from Josephine County.
What Grows in Grants Pass
Plants matched to Grants Pass's USDA zones 8b, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Grants Pass?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 17; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Grants Pass
Closest first, within ~10 miles of Grants Pass. Listing isn't leaking, and distance isn't exposure.
- EVERGREEN FEDERALUnderground Storage Tanks · 200 ft
- MOCK'S FORD SALES, INC.Underground Storage Tanks · 250 ft
- MOCK S FORDBrownfields · 350 ft
- LINCOLN CLEANERSBrownfields · 750 ft
- ARCO AM/PM FACILITY # 4282Underground Storage Tanks · 950 ft
- ARCO PRODUCTS CO 4282Brownfields · 950 ft
- BRITTS DETAILUnderground Storage Tanks · 1500 ft
- EXPERT TIREUnderground Storage Tanks · 1500 ft
- WHEELER MOTORS INCUnderground Storage Tanks · 1600 ft
- DARYLS RV VILLAGEUnderground Storage Tanks · 1700 ft
- WHEELER TOYOTAUnderground Storage Tanks · 1700 ft
- VIRGIL'S CHEVRON STATIONUnderground Storage Tanks · 1900 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Grants Pass'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 Grants Pass.
Total Sites
329
within ~10 miles of Grants Pass
Risk Level
High
Highest-severity
5 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Grants Pass
Severity Distribution
within ~10 miles of Grants Pass
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Grants Pass, two things run higher than the national average within ~10 miles of Grants Pass — Mining (40 sites) and Superfund (5 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Grants Pass
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 Grants Pass average
Your land is one point inside Grants Pass
Everything above resolves to Grants Pass as a whole — one PHZM band, read across 7K acres, with hard-freeze dates borrowed from Josephine County’s record because no 30-year normal resolves at this city’s own centroid. 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 Grants Pass Average
Grants Pass Average
- ●USDA Zones 8b, averaged across Grants Pass
- ●One soil character for all of Grants Pass
- ●Frost dates read at Grants Pass's scale: Apr 14 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Grants Pass's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Grants Pass
Pull a site-specific report for your exact address in Grants Pass, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Grants Pass averages can't show:
We read public map data around Grants Pass — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Grants Pass average
How we know this about Grants Pass
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 Josephine County’s record, because none resolves here; 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 Grants Pass
When does frost risk typically end in Grants Pass?
The last hard freeze (28°F) in Grants Pass typically lands around Apr 14, 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 5.
When is the first frost in Grants Pass?
The first hard freeze (28°F) in Grants Pass typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 199 days after the spring freeze cleared.
How long is the growing season in Grants Pass?
Measured between 28°F hard freezes, Grants Pass sees about 199 frost-free days — roughly Apr 14 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 5 to Oct 16, about 164 days.
Is the soil safe to grow vegetables in Grants Pass?
The federal record around Grants Pass runs heavier than most — 329 documented sites, mostly Underground Storage Tanks entries (179), the nearest Underground Storage Tanks record under a tenth of a mile 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 Grants Pass?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Grants Pass's scale — its 8b band and its 199-day season. Your yard writes its own version of Grants Pass'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 Grants Pass’s own scale
4 of the readings below were taken at Grants Pass's own scale — the 7,372 acres it covers and 329 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Grants Pass's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 329 documented contamination sites on the federal record near Grants Pass, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Grants Pass's boundary and the 7,372 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Grants Pass's own centroid, the Klamath Mountains/California High North Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Grants Pass has no normal of its own, so its county's is the closest measured readfrom Josephine County
- Soil character — no town-scale survey exists, so Grants Pass's 7,372 acres read through its county's SSURGO summaryfrom Josephine County
- The candidate plant list — Oregon's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Oregon
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Josephine County
- The growing challenges every Oregon grower plans around — written at state scale, so they stay on the state guidefrom Oregon
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Josephine County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Grants Pass's 7,372 acreswhy one lot differs from the next →
- Which side of Grants Pass you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 7,372 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Grants Pass-wide figureread your own land →
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