Siletz, Oregon, sits in USDA hardiness zone 9b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, kale, douglas fir, garlic, and hazelnut all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Siletz, 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 Siletz 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 Siletz — soil, climate, flood, and parcel records. How we handle your address.
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Siletz — the short answer
Siletz, Oregon: USDA zone 9b, about 308 days between hard freezes, across 403 acres of city.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 3
- Lincoln County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 8
- Lincoln County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~308
- Lincoln County normal — NOAA 1991–2020, nearest to this town
- City area
- 403 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 Lincoln County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Siletz's average, not your lot's — a low corner or a tree line moves it. Against Siletz's 308-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Siletz
Each reading below is measured for Siletz itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSiletz runs about 308 days between hard freezes (read from Lincoln County, the closest normal to Siletz) — 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
MeasuredSiletz sits in USDA hardiness zone 9b.
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 Siletz is in
Siletz sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Siletz's own centroid rather than borrowed from Lincoln County.
What Grows in Siletz
Plants matched to Siletz's USDA zones 9b, 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 Siletz?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Jan 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 8 — 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.
What's on the federal record near Siletz
Closest first, within ~10 miles of Siletz. Listing isn't leaking, and distance isn't exposure.
- SILETZ SERVICE CENTERUnderground Storage Tanks · 200 ft
- B & B MARKET $ GASUnderground Storage Tanks · 550 ft
- SILETZ SCHOOLUnderground Storage Tanks · 750 ft
- TOLEDO SAND GRAVEL CO. INC.Underground Storage Tanks · 0.8 mi
- TRUAX CORPORATION #89Underground Storage Tanks · 4.3 mi
- MOBIL MINI MARTUnderground Storage Tanks · 5.4 mi
- NW NATURAL TOLEDO REGIONAL STATION PIG RBrownfields · 6.3 mi
- LOGSDEN COUNTRY STORE LTDUnderground Storage Tanks · 6.3 mi
- HARMAN MOTER COMPANYUnderground Storage Tanks · 6.3 mi
- BURGESS BUS SHOPUnderground Storage Tanks · 6.4 mi
- LINCOLN COUNTY SD BUS SHOPBrownfields · 6.4 mi
- DAHL & DAHL, INC.Brownfields · 6.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Siletz'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 Siletz.
Total Sites
155
within ~10 miles of Siletz
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Siletz
Severity Distribution
within ~10 miles of Siletz
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Siletz
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 Siletz average
Your land is one point inside Siletz
Everything above resolves to Siletz as a whole — one PHZM band, read across 403 acres, with hard-freeze dates borrowed from Lincoln 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 Siletz Average
Siletz Average
- ●USDA Zones 9b, averaged across Siletz
- ●One soil character for all of Siletz
- ●Frost dates read at Siletz's scale: Feb 3 to Dec 8
YOUR Parcel
- ✓Your exact zone, not Siletz's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Siletz
Pull a site-specific report for your exact address in Siletz, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Siletz averages can't show:
We read public map data around Siletz — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Siletz average
How we know this about Siletz
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 Lincoln 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 Siletz
When does frost risk typically end in Siletz?
The last hard freeze (28°F) in Siletz typically lands around Feb 3, 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 Feb 24.
When is the first frost in Siletz?
The first hard freeze (28°F) in Siletz typically arrives around Dec 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 24, so the watching starts about Nov 8 — about 308 days after the spring freeze cleared.
How long is the growing season in Siletz?
Measured between 28°F hard freezes, Siletz sees about 308 frost-free days — roughly Feb 3 through Dec 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 24 to Nov 24, about 273 days.
Is the soil safe to grow vegetables in Siletz?
The federal record around Siletz is a meaningful one — 155 documented sites, mostly Underground Storage Tanks entries (95), the nearest Underground Storage Tanks 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 Siletz?
From about Nov 8 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 Dec 8 (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 Dec 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Siletz's scale — its 9b band and its 308-day season. Your yard writes its own version of Siletz'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 Siletz’s own scale
4 of the readings below were taken at Siletz's own scale — the 403 acres it covers and 155 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Siletz's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 155 documented contamination sites on the federal record near Siletz, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Siletz's boundary and the 403 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Siletz's own centroid, the Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Siletz has no normal of its own, so its county's is the closest measured readfrom Lincoln County
- Soil character — no town-scale survey exists, so Siletz's 403 acres read through its county's SSURGO summaryfrom Lincoln 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 Lincoln 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 Lincoln County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Siletz's 403 acreswhy one lot differs from the next →
- Which side of Siletz you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 403 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 Siletz-wide figureread your own land →