Enterprise, Oregon, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with okra, blackberry, california poppy, and pumpkin — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Enterprise, 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 Enterprise 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 Enterprise — soil, climate, flood, and parcel records. How we handle your address.
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Enterprise — the short answer
Enterprise, Oregon: USDA zone 6a, about 119 days between hard freezes, across 939 acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~119
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 939 acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 6a is Enterprise's average, not your lot's — a low corner or a tree line moves it. Against Enterprise's 119-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Enterprise
Each reading below is measured for Enterprise itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredEnterprise runs about 119 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredEnterprise sits in USDA hardiness zone 6a.
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 Enterprise is in
Enterprise sits in the Blue Mountains — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Enterprise's own centroid rather than borrowed from Wallowa County.
What Grows in Enterprise
Every plant below cleared Enterprise's own zone 6a and its 119-day season. Each card opens that plant's Oregon profile. How we score.
Is it too late to plant in Enterprise?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 18 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 14 — long-season crops need about 90 days of runway, quick greens only 30. When the window is tight, the fall moves are quick ones — baby greens, radishes, and garlic set for next season.
What's on the federal record near Enterprise
Closest first, within ~10 miles of Enterprise. Listing isn't leaking, and distance isn't exposure.
- ENTERPRISE CHEVRON LLCUnderground Storage Tanks · 150 ft
- PACIFIC POWER & LIGHTUnderground Storage Tanks · 300 ft
- WRIGHT'S BPUnderground Storage Tanks · 300 ft
- GTE ENTERPRISE CENTRAL OFFICE - 5030-B01Underground Storage Tanks · 300 ft
- UPRR - ENTERPRISE SECTION TOOLHOUSEUnderground Storage Tanks · 300 ft
- MAIN STREET MOTORSUnderground Storage Tanks · 500 ft
- WALLOWA COUNTY RD DEPTUnderground Storage Tanks · 550 ft
- ENTERPRISE OIL CO INCUnderground Storage Tanks · 550 ft
- TROY RESTAURANT & LODGEUnderground Storage Tanks · 550 ft
- QUIK RESPONSE CAR COLORSUnderground Storage Tanks · 550 ft
- COURTNEY MOTORSUnderground Storage Tanks · 600 ft
- ADVANCED AUTO 4X4, INC. an OREGON CORPORUnderground Storage Tanks · 750 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Enterprise'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 Enterprise.
Sources Checked
within ~10 miles of Enterprise
Severity Distribution
within ~10 miles of Enterprise
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Enterprise, Mining runs higher than the national average — 27 sites within ~10 miles of Enterprise. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Enterprise
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 Enterprise average
Your land is one point inside Enterprise
Everything above resolves to Enterprise as a whole — one PHZM band and one 28°F frost record, read across 939 acres. 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 Enterprise Average
Enterprise Average
- ●USDA Zones 6a, averaged across Enterprise
- ●One soil character for all of Enterprise
- ●Frost dates read at Enterprise's scale: May 18 to Sep 14
YOUR Parcel
- ✓Your exact zone, not Enterprise's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Enterprise
Pull a site-specific report for your exact address in Enterprise, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Enterprise averages can't show:
We read public map data around Enterprise — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Enterprise average
How we know this about Enterprise
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 Enterprise’s own record; 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 Enterprise
When does frost risk typically end in Enterprise?
The last hard freeze (28°F) in Enterprise typically lands around May 18, 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 Jun 8.
When is the first frost in Enterprise?
The first hard freeze (28°F) in Enterprise typically arrives around Sep 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Aug 31, so the watching starts about Aug 15 — about 119 days after the spring freeze cleared.
How long is the growing season in Enterprise?
Measured between 28°F hard freezes, Enterprise sees about 119 frost-free days — roughly May 18 through Sep 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 8 to Aug 31, about 84 days.
Is the soil safe to grow vegetables in Enterprise?
The federal record around Enterprise is a meaningful one — 75 documented sites, mostly Underground Storage Tanks entries (37), 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 gardeners stretch the season in Enterprise?
With about 119 frost-free days between hard freezes, Enterprise rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 147 to 175 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 18 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Enterprise's scale — its 6a band and its 119-day season. Your yard writes its own version of Enterprise'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 Enterprise’s own scale
6 of the readings below were taken at Enterprise's own scale — its own ~119-day season between 28°F freezes, the 939 acres it covers and 75 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Enterprise's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Enterprise's own 28°F hard-freeze dates, about May 18 and Sep 14 and the ~119-day span between themNOAA 1991–2020 Climate Normals
- 75 documented contamination sites on the federal record near Enterprise, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Enterprise's boundary and the 939 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~119-day seasonGrowable Ground crop-matching engine
- The ecoregion at Enterprise's own centroid, the Blue MountainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Enterprise's 939 acres read through its county's SSURGO summaryfrom Wallowa County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Wallowa 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 Wallowa County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Enterprise's 939 acreswhy one lot differs from the next →
- Which side of Enterprise you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 939 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 Enterprise-wide figureread your own land →
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