Aurora, Oregon, sits in USDA hardiness zone 9a — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Aurora, 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 Aurora 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 Aurora — soil, climate, flood, and parcel records. How we handle your address.
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Aurora — the short answer
Aurora, Oregon: USDA zone 9a, about 243 days between hard freezes, across 310 acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 23
- Marion County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 21
- Marion County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~243
- Marion County normal — NOAA 1991–2020, nearest to this town
- City area
- 310 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 Marion County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Aurora's average, not your lot's — a low corner or a tree line moves it. Against Aurora's 243-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Aurora
Each reading below is measured for Aurora itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsAurora runs about 243 days between hard freezes (read from Marion County, the closest normal to Aurora) — 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
MeasuredAurora sits in USDA hardiness zone 9a.
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 Aurora is in
Aurora sits in the Willamette Valley — EPA Level III, inside the wider Marine West Coast Forest. That is read at Aurora's own centroid rather than borrowed from Marion County.
What Grows in Aurora
Plants matched to Aurora's USDA zones 9a, 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 Aurora?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 23 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 21 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Aurora
Survey cells within 31 miles of Aurora checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 518 miles off. What to watch for.
What's on the federal record near Aurora
Closest first, within ~10 miles of Aurora. Listing isn't leaking, and distance isn't exposure.
- CAPITAL CITY COUnderground Storage Tanks · 600 ft
- LEATHERS OIL CO.Underground Storage Tanks · 1600 ft
- 04S/01W-13BBBNitrate · 1600 ft
- AURORA PROPERTYUnderground Storage Tanks · 1700 ft
- AURORA FOREST NURSERYUnderground Storage Tanks · 0.8 mi
- WEYERHAEUSER AURORA FOREST NURSERYBrownfields · 1.0 mi
- TOP-O-HILL RESTAURANT, INC.Underground Storage Tanks · 1.0 mi
- AURORA JET CENTERUnderground Storage Tanks · 1.1 mi
- COLUMBIA HELICOPTER INC FLABrownfields · 1.6 mi
- NW HAZELNUT COUnderground Storage Tanks · 1.8 mi
- GENERAL AVIATION SERVICESUnderground Storage Tanks · 1.9 mi
- WALLY FARMS, INC.Underground Storage Tanks · 2.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Aurora'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 Aurora.
Total Sites
542
within ~10 miles of Aurora
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Aurora
Severity Distribution
within ~10 miles of Aurora
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Aurora, two things run higher than the national average within ~10 miles of Aurora — CAFO (9 sites) and PFAS (8 sites). That's not a problem with your land — it's information about it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Aurora
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 Aurora average
Your land is one point inside Aurora
Everything above resolves to Aurora as a whole — one PHZM band, read across 310 acres, with hard-freeze dates borrowed from Marion 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 Aurora Average
Aurora Average
- ●USDA Zones 9a, averaged across Aurora
- ●One soil character for all of Aurora
- ●Frost dates read at Aurora's scale: Mar 23 to Nov 21
YOUR Parcel
- ✓Your exact zone, not Aurora's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Aurora
Pull a site-specific report for your exact address in Aurora, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Aurora averages can't show:
We read public map data around Aurora — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Aurora average
How we know this about Aurora
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 Marion 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 Aurora
When does frost risk typically end in Aurora?
The last hard freeze (28°F) in Aurora typically lands around Mar 23, 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 13.
When is the first frost in Aurora?
The first hard freeze (28°F) in Aurora typically arrives around Nov 21, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 7, so the watching starts about Oct 22 — about 243 days after the spring freeze cleared.
How long is the growing season in Aurora?
Measured between 28°F hard freezes, Aurora sees about 243 frost-free days — roughly Mar 23 through Nov 21, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 13 to Nov 7, about 208 days.
Is the soil safe to grow vegetables in Aurora?
The federal record around Aurora is a meaningful one — 542 documented sites, mostly Underground Storage Tanks entries (286), the nearest Underground Storage Tanks record about 0.1 miles 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 Aurora?
From about Oct 22 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 21 (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 21. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Aurora's scale — its 9a band and its 243-day season. Your yard writes its own version of Aurora'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 Aurora’s own scale
5 of the readings below were taken at Aurora's own scale — the 310 acres it covers and 542 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Aurora's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 542 documented contamination sites on the federal record near Aurora, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Aurora's boundary and the 310 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Aurora's own centroid, the Willamette ValleyUS EPA Level III Ecoregions
- Lanternfly survey cells around Aurora checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Aurora has no normal of its own, so its county's is the closest measured readfrom Marion County
- Soil character — no town-scale survey exists, so Aurora's 310 acres read through its county's SSURGO summaryfrom Marion 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 Marion 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 Marion County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Aurora's 310 acreswhy one lot differs from the next →
- Which side of Aurora you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 310 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 Aurora-wide figureread your own land →