Blaine, Washington, sits in USDA hardiness zone 8b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with kale, potato, garlic, and western red cedar — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Blaine, 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 Blaine 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 Blaine — soil, climate, flood, and parcel records. How we handle your address.
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Blaine — the short answer
Blaine, Washington: USDA zone 8b, about 131 days between hard freezes, across 4K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 29
- Whatcom County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Oct 7
- Whatcom County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~131
- Whatcom County normal — NOAA 1991–2020, nearest to this town
- City area
- 4K 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 Whatcom County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Blaine's average, not your lot's — a low corner or a tree line moves it. Against Blaine's 131-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Blaine
Each reading below is measured for Blaine itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBlaine runs about 131 days between hard freezes (read from Whatcom County, the closest normal to Blaine) — 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
MeasuredBlaine 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 Blaine is in
Blaine sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Blaine's own centroid, and it is not what its county reads: Whatcom County is mostly North Cascades. The wider page above you is answering a different question about different ground.
What Grows in Blaine
Plants matched to Blaine's USDA zones 8b, 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 Blaine?
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 May 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 29 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 7 — long-season crops need about 90 days of runway, quick greens only 30. Short seasons reward decisiveness — quick-maturing varieties late, hardy greens under cover, and next year’s garlic in the ground before it closes.
What's on the federal record near Blaine
Closest first, within ~10 miles of Blaine. Listing isn't leaking, and distance isn't exposure.
- SUMAS CITY OFUnderground Storage Tanks · 800 ft
- DENNIS N BROWNUnderground Storage Tanks · 850 ft
- BLAINE SCHOOL DISTRICT 503Underground Storage Tanks · 2600 ft
- HILLS CHEVRONBrownfields · 0.6 mi
- HILL'S CHEVRONUnderground Storage Tanks · 0.6 mi
- TESORO 2154Underground Storage Tanks · 0.6 mi
- BLAINE GULL 304Underground Storage Tanks · 0.6 mi
- JUSTESEN INDUSTRIESToxics Release Inventory · 0.6 mi
- PEACE PORTAL SHELLUnderground Storage Tanks · 0.7 mi
- USA # 68401Underground Storage Tanks · 0.7 mi
- BLAINE STPUnderground Storage Tanks · 0.7 mi
- BLAINE SCHOOL DISTRICT CAMPUSUnderground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Blaine'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 Blaine.
Total Sites
180
within ~10 miles of Blaine
Risk Level
Elevated
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Blaine
Severity Distribution
within ~10 miles of Blaine
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Blaine, two things run higher than the national average within ~10 miles of Blaine — CAFO (18 sites) and Superfund (4 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Blaine
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 Blaine average
Your land is one point inside Blaine
Everything above resolves to Blaine as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Whatcom 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 Blaine Average
Blaine Average
- ●USDA Zones 8b, averaged across Blaine
- ●One soil character for all of Blaine
- ●Frost dates read at Blaine's scale: May 29 to Oct 7
YOUR Parcel
- ✓Your exact zone, not Blaine's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Blaine
Pull a site-specific report for your exact address in Blaine, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Blaine averages can't show:
We read public map data around Blaine — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Blaine average
How we know this about Blaine
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 Whatcom 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 Blaine
When does frost risk typically end in Blaine?
The last hard freeze (28°F) in Blaine typically lands around May 29, 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 19.
When is the first frost in Blaine?
The first hard freeze (28°F) in Blaine typically arrives around Oct 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 23, so the watching starts about Sep 7 — about 131 days after the spring freeze cleared.
How long is the growing season in Blaine?
Measured between 28°F hard freezes, Blaine sees about 131 frost-free days — roughly May 29 through Oct 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 19 to Sep 23, about 96 days.
Is the soil safe to grow vegetables in Blaine?
The federal record around Blaine is a meaningful one — 180 documented sites, mostly Underground Storage Tanks entries (70), the nearest Underground Storage Tanks record about 0.2 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 gardeners stretch the season in Blaine?
With about 131 frost-free days between hard freezes, Blaine 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 159 to 187 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 29 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Blaine's scale — its 8b band and its 131-day season. Your yard writes its own version of Blaine'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 Blaine’s own scale
4 of the readings below were taken at Blaine's own scale — the 3,575 acres it covers and 180 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Blaine's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 180 documented contamination sites on the federal record near Blaine, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Blaine's boundary and the 3,575 acres inside itUS Census TIGER/Line 2025
- Blaine sits in the Puget Lowland — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Blaine has no normal of its own, so its county's is the closest measured readfrom Whatcom County
- Soil character — no town-scale survey exists, so Blaine's 3,575 acres read through its county's SSURGO summaryfrom Whatcom County
- The candidate plant list — Washington's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Washington
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Whatcom 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 Whatcom County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Blaine's 3,575 acreswhy one lot differs from the next →
- Which side of Blaine you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,575 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Blaine-wide figureread your own land →
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