Columbia City, Oregon, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Among the crops suited to this profile: cabbage, fig, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Columbia City, 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 Columbia City 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 Columbia City — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Columbia City — the short answer
Columbia City, Oregon: USDA zone 8b, about 262 days between hard freezes, across 502 acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 9
- Columbia County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 26
- Columbia County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~262
- Columbia County normal — NOAA 1991–2020, nearest to this town
- City area
- 502 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 Columbia County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Columbia City's average, not your lot's — a low corner or a tree line moves it. Against Columbia City's 262-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Columbia City
Each reading below is measured for Columbia City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsColumbia City runs about 262 days between hard freezes (read from Columbia County, the closest normal to Columbia City) — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredColumbia City 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 Columbia City is in
Columbia City sits in the Willamette Valley — EPA Level III, inside the wider Marine West Coast Forest. That is read at Columbia City's own centroid, and it is not what its county reads: Columbia County is mostly Coast Range. The wider page above you is answering a different question about different ground.
What Grows in Columbia City
Every plant below cleared Columbia City's own zone 8b and its 262-day season. Each card opens that plant's Oregon profile. How we score.
Is it too late to plant in Columbia City?
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 Feb 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 26 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
Documented around Columbia City
Survey cells within 31 miles of Columbia City checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 564 miles off. What to watch for.
What's on the federal record near Columbia City
Closest first, within ~10 miles of Columbia City. Listing isn't leaking, and distance isn't exposure.
- CLEARWATER PAPER CORPORATIONBrownfields · 450 ft
- ODOF COLUMBIA UNITBrownfields · 2300 ft
- COLUMBIA UNIT HEADQUARTERSUnderground Storage Tanks · 2300 ft
- HICKEY JR, PHILIP LUnderground Storage Tanks · 0.7 mi
- RIVER TOWNE STOREUnderground Storage Tanks · 0.7 mi
- WALKER RESIDENCEUnderground Storage Tanks · 0.7 mi
- CPEX PACIFIC INCUnderground Storage Tanks · 1.0 mi
- COLUMBIA RIVER NITROGEN, LLCToxics Release Inventory · 1.2 mi
- COLUMBIA RIVER NITROGEN, LLCBrownfields · 1.2 mi
- 05N/01W-22R01Nitrate · 1.3 mi
- WATTERS CONCRETE PRODUCTS INCUnderground Storage Tanks · 1.9 mi
- CITY OF ST HELENS SHOPSUnderground Storage Tanks · 2.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Columbia City'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 Columbia City.
Total Sites
258
within ~10 miles of Columbia City
Risk Level
Elevated
Highest-severity
8 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Columbia City
Severity Distribution
within ~10 miles of Columbia City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Columbia City, two things run higher than the national average within ~10 miles of Columbia City — Superfund (8 sites) and PFAS (3 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Columbia City
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 Columbia City average
Your land is one point inside Columbia City
Everything above resolves to Columbia City as a whole — one PHZM band, read across 502 acres, with hard-freeze dates borrowed from Columbia 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 Columbia City Average
Columbia City Average
- ●USDA Zones 8b, averaged across Columbia City
- ●One soil character for all of Columbia City
- ●Frost dates read at Columbia City's scale: Mar 9 to Nov 26
YOUR Parcel
- ✓Your exact zone, not Columbia City's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Columbia City
Pull a site-specific report for your exact address in Columbia City, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Columbia City averages can't show:
We read public map data around Columbia City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Columbia City average
How we know this about Columbia City
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 Columbia 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 Columbia City
When does frost risk typically end in Columbia City?
The last hard freeze (28°F) in Columbia City typically lands around Mar 9, 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 Mar 30.
When is the first frost in Columbia City?
The first hard freeze (28°F) in Columbia City typically arrives around Nov 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 12, so the watching starts about Oct 27 — about 262 days after the spring freeze cleared.
How long is the growing season in Columbia City?
Measured between 28°F hard freezes, Columbia City sees about 262 frost-free days — roughly Mar 9 through Nov 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 30 to Nov 12, about 227 days.
Is the soil safe to grow vegetables in Columbia City?
The federal record around Columbia City is a meaningful one — 258 documented sites, mostly Underground Storage Tanks entries (150), 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 Columbia City?
From about Oct 27 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 Nov 26 (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 Nov 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Columbia City's scale — its 8b band and its 262-day season. Your yard writes its own version of Columbia City'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 Columbia City’s own scale
6 of the readings below were taken at Columbia City's own scale — the 502 acres it covers and 258 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Columbia City's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 258 documented contamination sites on the federal record near Columbia City, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Columbia City's boundary and the 502 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~262-day seasonGrowable Ground crop-matching engine
- Columbia City sits in the Willamette Valley — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Columbia City checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Columbia City has no normal of its own, so its county's is the closest measured readfrom Columbia County
- Soil character — no town-scale survey exists, so Columbia City's 502 acres read through its county's SSURGO summaryfrom Columbia County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Columbia 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 Columbia County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Columbia City's 502 acreswhy one lot differs from the next →
- Which side of Columbia City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 502 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 Columbia City-wide figureread your own land →
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