Blyn, Washington, sits in USDA hardiness zone 8b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Blyn, 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 Blyn 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 Blyn — soil, climate, flood, and parcel records. How we handle your address.
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Blyn — the short answer
Blyn, Washington: USDA zone 8b, about 272 days between hard freezes, across 3K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 23
- 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
- ~272
- 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 Blyn's average, not your lot's — a low corner or a tree line moves it. Against Blyn's 272-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Blyn
Each reading below is measured for Blyn itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBlyn runs about 272 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
MeasuredBlyn 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 Blyn is in
Blyn sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Blyn's own centroid, and it is not what its county reads: Clallam County is mostly Coast Range. The wider page above you is answering a different question about different ground.
What Grows in Blyn
Every plant below cleared Blyn's own zone 8b and its 272-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Blyn?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 23 (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. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Blyn
Closest first, within ~10 miles of Blyn. Listing isn't leaking, and distance isn't exposure.
- AT&T MT BLYN FACILITYUnderground Storage Tanks · 2100 ft
- SEQUIM BAY STATE PARKUnderground Storage Tanks · 1.3 mi
- 29N/03W-12G01Nitrate · 1.3 mi
- JAMESTOWN S'KLALLAM TRIBEUnderground Storage Tanks · 1.3 mi
- 29N/02W-07C03Nitrate · 1.3 mi
- WA DWF SEQUIM RV PARKUnderground Storage Tanks · 1.6 mi
- E-CYCLE NWSuperfund · 2.2 mi
- WASHINGTON MARITIME NATIONAL WILDLIFE REUnderground Storage Tanks · 2.3 mi
- 30N/02W-31J02Nitrate · 2.7 mi
- SEQUIM BAY GENERAL STOREUnderground Storage Tanks · 2.9 mi
- 30N/03W-36L01Nitrate · 2.9 mi
- 30N/02W-28N03Nitrate · 3.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Blyn'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 Blyn.
Total Sites
182
within ~10 miles of Blyn
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Blyn
Severity Distribution
within ~10 miles of Blyn
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Blyn, two things run higher than the national average within ~10 miles of Blyn — PFAS (7 sites) and Nitrate (76 sites). That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Blyn
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 Blyn average
Your land is one point inside Blyn
Everything above resolves to Blyn 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 Blyn Average
Blyn Average
- ●USDA Zones 8b, averaged across Blyn
- ●One soil character for all of Blyn
- ●Frost dates read at Blyn's scale: Feb 23 to Nov 22
YOUR Parcel
- ✓Your exact zone, not Blyn's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Blyn
Pull a site-specific report for your exact address in Blyn, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Blyn averages can't show:
We read public map data around Blyn — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Blyn average
How we know this about Blyn
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 Blyn’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 Blyn
When does frost risk typically end in Blyn?
The last hard freeze (28°F) in Blyn typically lands around Feb 23, 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 16.
When is the first frost in Blyn?
The first hard freeze (28°F) in Blyn 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 272 days after the spring freeze cleared.
How long is the growing season in Blyn?
Measured between 28°F hard freezes, Blyn sees about 272 frost-free days — roughly Feb 23 through Nov 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 16 to Nov 8, about 237 days.
Is the soil safe to grow vegetables in Blyn?
The federal record around Blyn is a meaningful one — 182 documented sites, mostly Nitrate entries (76), the nearest Underground Storage Tanks record about 0.4 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 Blyn?
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 Blyn's scale — its 8b band and its 272-day season. Your yard writes its own version of Blyn'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 Blyn’s own scale
6 of the readings below were taken at Blyn's own scale — its own ~272-day season between 28°F freezes, the 3,061 acres it covers and 182 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Blyn's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Blyn's own 28°F hard-freeze dates, about Feb 23 and Nov 22 and the ~272-day span between themNOAA 1991–2020 Climate Normals
- 182 documented contamination sites on the federal record near Blyn, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Blyn's boundary and the 3,061 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~272-day seasonGrowable Ground crop-matching engine
- Blyn sits in the Puget Lowland — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Blyn's 3,061 acres read through its county's SSURGO summaryfrom Clallam County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clallam 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 Clallam County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Blyn's 3,061 acreswhy one lot differs from the next →
- Which side of Blyn you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,061 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Blyn-wide figureread your own land →