Bunker Hill, Oregon, sits in USDA hardiness zone 9a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include artichoke, fig, california poppy, and cabbage, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Bunker Hill, 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 Bunker Hill 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 Bunker Hill — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Bunker Hill — the short answer
Bunker Hill, Oregon: USDA zone 9a, about 292 days between hard freezes, across 934 acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 8
- Coos County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 27
- Coos County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~292
- Coos County normal — NOAA 1991–2020, nearest to this town
- Town area
- 934 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 Coos County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Bunker Hill's average, not your lot's — a low corner or a tree line moves it. Against Bunker Hill's 292-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bunker Hill
Each reading below is measured for Bunker Hill itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBunker Hill runs about 292 days between hard freezes (read from Coos County, the closest normal to Bunker Hill) — 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
MeasuredBunker Hill 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 Bunker Hill is in
Bunker Hill sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Bunker Hill's own centroid rather than borrowed from Coos County.
What Grows in Bunker Hill
Every plant below cleared Bunker Hill's own zone 9a and its 292-day season. Each card opens that plant's Oregon profile. How we score.
Is it too late to plant in Bunker Hill?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 27 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Bunker Hill
Closest first, within ~10 miles of Bunker Hill. Listing isn't leaking, and distance isn't exposure.
- FAIRBANKS CAPITOL CORP.Underground Storage Tanks · 2400 ft
- CITY OF COOS BAYUnderground Storage Tanks · 2600 ft
- COOS BAY SERVICE CENTERUnderground Storage Tanks · 0.5 mi
- CHAMBERS PLUMBING & HEATING INCUnderground Storage Tanks · 0.5 mi
- BASSETT-HYLAND ENERGY CO - MAIN OFFICEUnderground Storage Tanks · 0.6 mi
- EMBARCADERO INVESTMENTSUnderground Storage Tanks · 0.6 mi
- GOLD COAST SECURITYUnderground Storage Tanks · 0.6 mi
- AUTOMOTIVE ELECTRIC INCORPORATEDBrownfields · 0.6 mi
- OR STATE HWY 3-7 COOS BAYUnderground Storage Tanks · 0.6 mi
- OREGON DEPARTMENT OF TRANSPORTATIONBrownfields · 0.6 mi
- WASTEWATER PUMP STATION #9Underground Storage Tanks · 0.6 mi
- WEBSTER, LEE & VIRGINIAUnderground Storage Tanks · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Bunker Hill'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 Bunker Hill.
Total Sites
286
within ~10 miles of Bunker Hill
Risk Level
Elevated
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Bunker Hill
Severity Distribution
within ~10 miles of Bunker Hill
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bunker Hill, two things run higher than the national average within ~10 miles of Bunker Hill — Mining (30 sites) and Superfund (4 sites). That's not a problem with your land — it's information about it.
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 Bunker Hill
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 Bunker Hill average
Your land is one point inside Bunker Hill
Everything above resolves to Bunker Hill as a whole — one PHZM band, read across 934 acres, with hard-freeze dates borrowed from Coos County’s record because no 30-year normal resolves at this town’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 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 Bunker Hill Average
Bunker Hill Average
- ●USDA Zones 9a, averaged across Bunker Hill
- ●One soil character for all of Bunker Hill
- ●Frost dates read at Bunker Hill's scale: Feb 8 to Nov 27
YOUR Parcel
- ✓Your exact zone, not Bunker Hill's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bunker Hill
Pull a site-specific report for your exact address in Bunker Hill, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bunker Hill averages can't show:
We read public map data around Bunker Hill — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bunker Hill average
How we know this about Bunker Hill
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 Coos 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 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 Bunker Hill
When does frost risk typically end in Bunker Hill?
The last hard freeze (28°F) in Bunker Hill typically lands around Feb 8, 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 1.
When is the first frost in Bunker Hill?
The first hard freeze (28°F) in Bunker Hill typically arrives around Nov 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 13, so the watching starts about Oct 28 — about 292 days after the spring freeze cleared.
How long is the growing season in Bunker Hill?
Measured between 28°F hard freezes, Bunker Hill sees about 292 frost-free days — roughly Feb 8 through Nov 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 1 to Nov 13, about 257 days.
Is the soil safe to grow vegetables in Bunker Hill?
The federal record around Bunker Hill is a meaningful one — 286 documented sites, mostly Underground Storage Tanks entries (169), the nearest Underground Storage Tanks record about 0.5 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 Bunker Hill?
From about Oct 28 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 27 (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 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Bunker Hill's scale — its 9a band and its 292-day season. Your yard writes its own version of Bunker Hill'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 Bunker Hill’s own scale
5 of the readings below were taken at Bunker Hill's own scale — the 934 acres it covers and 286 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Bunker Hill's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 286 documented contamination sites on the federal record near Bunker Hill, the closest Underground Storage Tanks record about 0.5 miles out from the town centreFederal environmental registers
- Bunker Hill's boundary and the 934 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~292-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bunker Hill's own centroid, the Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Bunker Hill has no normal of its own, so its county's is the closest measured readfrom Coos County
- Soil character — no town-scale survey exists, so Bunker Hill's 934 acres read through its county's SSURGO summaryfrom Coos County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Coos 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 Coos County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bunker Hill's 934 acreswhy one lot differs from the next →
- Which side of Bunker Hill you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 934 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.5 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 Bunker Hill-wide figureread your own land →