Bull Mountain, Oregon, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Expect cabbage, fig, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Bull Mountain, 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 Bull Mountain 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 Bull Mountain — soil, climate, flood, and parcel records. How we handle your address.
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Bull Mountain — the short answer
Bull Mountain, Oregon: USDA zone 8b, about 274 days between hard freezes, across 1K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 22
- Washington County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 23
- Washington County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~274
- Washington County normal — NOAA 1991–2020, nearest to this town
- Town area
- 1K 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 Washington County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Bull Mountain's average, not your lot's — a low corner or a tree line moves it. Against Bull Mountain's 274-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bull Mountain
Each reading below is measured for Bull Mountain itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBull Mountain runs about 274 days between hard freezes (read from Washington County, the closest normal to Bull Mountain) — 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
MeasuredBull Mountain 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 Bull Mountain is in
Bull Mountain sits in the Willamette Valley — EPA Level III, inside the wider Marine West Coast Forest. That is read at Bull Mountain's own centroid rather than borrowed from Washington County.
What Grows in Bull Mountain
Every plant below cleared Bull Mountain's own zone 8b and its 274-day season. Each card opens that plant's Oregon profile. How we score.
Is it too late to plant in Bull Mountain?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Jan 25; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 22 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 23 — 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.
Documented around Bull Mountain
Survey cells within 31 miles of Bull Mountain checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 530 miles off. What to watch for.
What's on the federal record near Bull Mountain
Closest first, within ~10 miles of Bull Mountain. Listing isn't leaking, and distance isn't exposure.
- CITY OF TIGARD WATER DEPARTMENTUnderground Storage Tanks · 0.6 mi
- 02S/01W-17CAB01Nitrate · 1.2 mi
- ALBERTSONS LLCBrownfields · 1.4 mi
- GOLF COURSEUnderground Storage Tanks · 1.4 mi
- CHEVRON 209056Brownfields · 1.6 mi
- MOUNTAINSIDE HIGH SCHOOLUnderground Storage Tanks · 1.6 mi
- MURRAY HILLS CHEVRONUnderground Storage Tanks · 1.7 mi
- WESTERN SERVICE CENTERUnderground Storage Tanks · 1.7 mi
- MORSE BROS INC - PROGRESSUnderground Storage Tanks · 1.8 mi
- ARCO FACILITY NO. 01175Underground Storage Tanks · 1.8 mi
- ARCO PRODUCTS CO 1175Brownfields · 1.8 mi
- FRONTIER BULL MOUNTAIN CENTRAL OFF. 5490Underground Storage Tanks · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Bull Mountain'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 Bull Mountain.
Total Sites
1,832
within ~10 miles of Bull Mountain
Risk Level
Elevated
Highest-severity
10 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Bull Mountain
Severity Distribution
within ~10 miles of Bull Mountain
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bull Mountain, Toxics Release Inventory runs higher than the national average — 115 sites within ~10 miles of Bull Mountain. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Bull Mountain
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 Bull Mountain average
Your land is one point inside Bull Mountain
Everything above resolves to Bull Mountain as a whole — one PHZM band, read across 1K acres, with hard-freeze dates borrowed from Washington 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 Bull Mountain Average
Bull Mountain Average
- ●USDA Zones 8b, averaged across Bull Mountain
- ●One soil character for all of Bull Mountain
- ●Frost dates read at Bull Mountain's scale: Feb 22 to Nov 23
YOUR Parcel
- ✓Your exact zone, not Bull Mountain's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bull Mountain
Pull a site-specific report for your exact address in Bull Mountain, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bull Mountain averages can't show:
We read public map data around Bull Mountain — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bull Mountain average
How we know this about Bull Mountain
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 Washington 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 Bull Mountain
When does frost risk typically end in Bull Mountain?
The last hard freeze (28°F) in Bull Mountain typically lands around Feb 22, 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 15.
When is the first frost in Bull Mountain?
The first hard freeze (28°F) in Bull Mountain typically arrives around Nov 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 9, so the watching starts about Oct 24 — about 274 days after the spring freeze cleared.
How long is the growing season in Bull Mountain?
Measured between 28°F hard freezes, Bull Mountain sees about 274 frost-free days — roughly Feb 22 through Nov 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 15 to Nov 9, about 239 days.
Is the soil safe to grow vegetables in Bull Mountain?
The federal record around Bull Mountain is a meaningful one — 1,832 documented sites, mostly Underground Storage Tanks entries (882), the nearest Underground Storage Tanks record about 0.6 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 Bull Mountain?
From about Oct 24 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Bull Mountain's scale — its 8b band and its 274-day season. Your yard writes its own version of Bull Mountain'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 Bull Mountain’s own scale
6 of the readings below were taken at Bull Mountain's own scale — the 1,270 acres it covers and 1,832 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Bull Mountain's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 1,832 documented contamination sites on the federal record near Bull Mountain, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Bull Mountain's boundary and the 1,270 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~274-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bull Mountain's own centroid, the Willamette ValleyUS EPA Level III Ecoregions
- Lanternfly survey cells around Bull Mountain checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Bull Mountain has no normal of its own, so its county's is the closest measured readfrom Washington County
- Soil character — no town-scale survey exists, so Bull Mountain's 1,270 acres read through its county's SSURGO summaryfrom Washington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washington 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 Washington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bull Mountain's 1,270 acreswhy one lot differs from the next →
- Which side of Bull Mountain you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,270 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 Bull Mountain-wide figureread your own land →