La Grande, Washington, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in La Grande, 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 La Grande 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 La Grande — soil, climate, flood, and parcel records. How we handle your address.
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La Grande — the short answer
La Grande, Washington: USDA zone 8b, about 261 days between hard freezes, across 3K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~261
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 8b is La Grande's average, not your lot's — a low corner or a tree line moves it. Against La Grande's 261-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in La Grande
Each reading below is measured for La Grande itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLa Grande runs about 261 days between hard freezes — 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
MeasuredLa Grande 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 La Grande is in
La Grande sits in the Cascades — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at La Grande's own centroid rather than borrowed from Pierce County.
What Grows in La Grande
Every plant below cleared La Grande's own zone 8b and its 261-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in La Grande?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 22 — 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 La Grande
Closest first, within ~10 miles of La Grande. Listing isn't leaking, and distance isn't exposure.
- ALDER MAINTENANCE SITEUnderground Storage Tanks · 0.7 mi
- TACOMA PUBLIC UTILITIES LAGRANDE DAMBrownfields · 1.3 mi
- TACOMA DPU ALDER DAMBrownfields · 1.4 mi
- WA UW PACK FOREST FACILITYBrownfields · 2.7 mi
- LA GRANDE HYDROPLANTUnderground Storage Tanks · 2.7 mi
- PACK FORESTUnderground Storage Tanks · 2.8 mi
- R J SWANSON INCUnderground Storage Tanks · 2.9 mi
- MashelMining · 2.9 mi
- GRACE KNEIPUnderground Storage Tanks · 3.6 mi
- ASSOCIATED PETROLEUM PRODUCTS INC EATONVILLEUnderground Storage Tanks · 3.7 mi
- Hamilton CenterpointUnderground Storage Tanks · 3.8 mi
- MILL TOWN GROCERYUnderground Storage Tanks · 3.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from La Grande'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 La Grande.
Total Sites
54
within ~10 miles of La Grande
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of La Grande
Severity Distribution
within ~10 miles of La Grande
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around La Grande, Mining runs higher than the national average — 3 sites within ~10 miles of La Grande. 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.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in La Grande
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 La Grande average
Your land is one point inside La Grande
Everything above resolves to La Grande as a whole — one PHZM band and one 28°F frost record, read across 3K 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 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 La Grande Average
La Grande Average
- ●USDA Zones 8b, averaged across La Grande
- ●One soil character for all of La Grande
- ●Frost dates read at La Grande's scale: Mar 6 to Nov 22
YOUR Parcel
- ✓Your exact zone, not La Grande's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in La Grande
Pull a site-specific report for your exact address in La Grande, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that La Grande averages can't show:
We read public map data around La Grande — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the La Grande average
How we know this about La Grande
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 La Grande’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 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 La Grande
When does frost risk typically end in La Grande?
The last hard freeze (28°F) in La Grande typically lands around Mar 6, 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 27.
When is the first frost in La Grande?
The first hard freeze (28°F) in La Grande typically arrives around Nov 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 8, so the watching starts about Oct 23 — about 261 days after the spring freeze cleared.
How long is the growing season in La Grande?
Measured between 28°F hard freezes, La Grande sees about 261 frost-free days — roughly Mar 6 through Nov 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 27 to Nov 8, about 226 days.
Is the soil safe to grow vegetables in La Grande?
The federal record around La Grande shows 54 documented sites, mostly Underground Storage Tanks entries (33), the nearest Underground Storage Tanks record about 0.7 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in La Grande?
From about Oct 23 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at La Grande's scale — its 8b band and its 261-day season. Your yard writes its own version of La Grande'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 La Grande’s own scale
6 of the readings below were taken at La Grande's own scale — its own ~261-day season between 28°F freezes, the 2,724 acres it covers and 54 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- La Grande's own USDA hardiness band, zones 8bUSDA PHZM 2023
- La Grande's own 28°F hard-freeze dates, about Mar 6 and Nov 22 and the ~261-day span between themNOAA 1991–2020 Climate Normals
- 54 documented contamination sites on the federal record near La Grande, the closest Underground Storage Tanks record about 0.7 miles out from the town centreFederal environmental registers
- La Grande's boundary and the 2,724 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~261-day seasonGrowable Ground crop-matching engine
- The ecoregion at La Grande's own centroid, the CascadesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so La Grande's 2,724 acres read through its county's SSURGO summaryfrom Pierce County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pierce County
- The growing challenges every Washington grower plans around — written at state scale, so they stay on the state guidefrom Washington
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Pierce County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among La Grande's 2,724 acreswhy one lot differs from the next →
- Which side of La Grande you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,724 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.7 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 La Grande-wide figureread your own land →
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