Warm Springs, Oregon, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, pawpaw, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Warm Springs, 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 Warm Springs 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 Warm Springs — soil, climate, flood, and parcel records. How we handle your address.
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Warm Springs — the short answer
Warm Springs, Oregon: USDA zone 7a, about 193 days between hard freezes, across 27K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~193
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 27K 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 Warm Springs's average, not your lot's — a low corner or a tree line moves it. Against Warm Springs's 193-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Warm Springs
Each reading below is measured for Warm Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWarm Springs runs about 193 days between hard freezes — 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
MeasuredWarm Springs 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 Warm Springs is in
Warm Springs sits in the Blue Mountains — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Warm Springs's own centroid rather than borrowed from Jefferson County.
What Grows in Warm Springs
Every plant below cleared Warm Springs's own zone 7a and its 193-day season. Each card opens that plant's Oregon profile. How we score.
Is it too late to plant in Warm Springs?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 25 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Warm Springs
Closest first, within ~10 miles of Warm Springs. Listing isn't leaking, and distance isn't exposure.
- WARM SPRINGS FOREST PRODUCTSToxics Release Inventory · 2.0 mi
- PINE GROVE TD-2 PNGVORQ5680Underground Storage Tanks · 2.1 mi
- CROOKED RIVER NAT'L GRASSLANDS - HQUnderground Storage Tanks · 3.7 mi
- SMITH & GREENE LOGGING COMPANYUnderground Storage Tanks · 4.1 mi
- RAINBOW STATIONUnderground Storage Tanks · 6.2 mi
- BN RR - GATEWAY #345Underground Storage Tanks · 8.2 mi
- 09S/14E-20CAANitrate · 8.2 mi
- 09S/14E-21CCCNitrate · 8.9 mi
- OSU COARC MADRASBrownfields · 9.1 mi
Measured from Warm Springs'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 Warm Springs.
Total Sites
11
within ~10 miles of Warm Springs
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Warm Springs
Severity Distribution
within ~10 miles of Warm Springs
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Warm Springs
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 Warm Springs average
Your land is one point inside Warm Springs
Everything above resolves to Warm Springs as a whole — one PHZM band and one 28°F frost record, read across 27K 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 Warm Springs Average
Warm Springs Average
- ●USDA Zones 7a, averaged across Warm Springs
- ●One soil character for all of Warm Springs
- ●Frost dates read at Warm Springs's scale: Apr 15 to Oct 25
YOUR Parcel
- ✓Your exact zone, not Warm Springs's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Warm Springs
Pull a site-specific report for your exact address in Warm Springs, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Warm Springs averages can't show:
We read public map data around Warm Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Warm Springs average
How we know this about Warm Springs
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 Warm Springs’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 Warm Springs
When does frost risk typically end in Warm Springs?
The last hard freeze (28°F) in Warm Springs typically lands around Apr 15, 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 6.
When is the first frost in Warm Springs?
The first hard freeze (28°F) in Warm Springs typically arrives around Oct 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 11, so the watching starts about Sep 25 — about 193 days after the spring freeze cleared.
How long is the growing season in Warm Springs?
Measured between 28°F hard freezes, Warm Springs sees about 193 frost-free days — roughly Apr 15 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 11, about 158 days.
Is the soil safe to grow vegetables in Warm Springs?
The federal record around Warm Springs is light — 11 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (5), the nearest Toxics Release Inventory record about 2.0 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Warm Springs?
From about Sep 25 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Warm Springs's scale — its 7a band and its 193-day season. Your yard writes its own version of Warm Springs'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 Warm Springs’s own scale
6 of the readings below were taken at Warm Springs's own scale — its own ~193-day season between 28°F freezes, the 27,162 acres it covers and 11 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Warm Springs's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Warm Springs's own 28°F hard-freeze dates, about Apr 15 and Oct 25 and the ~193-day span between themNOAA 1991–2020 Climate Normals
- 11 documented contamination sites on the federal record near Warm Springs, the closest Toxics Release Inventory record about 2.0 miles out from the town centreFederal environmental registers
- Warm Springs's boundary and the 27,162 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~193-day seasonGrowable Ground crop-matching engine
- The ecoregion at Warm Springs's own centroid, the Blue MountainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Warm Springs's 27,162 acres read through its county's SSURGO summaryfrom Jefferson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jefferson 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 Jefferson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Warm Springs's 27,162 acreswhy one lot differs from the next →
- Which side of Warm Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 27,162 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory record about 2.0 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 Warm Springs-wide figureread your own land →