Big Lake, Washington, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, fig, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Big Lake, 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 Big Lake 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 Big Lake — soil, climate, flood, and parcel records. How we handle your address.
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Big Lake — the short answer
Big Lake, Washington: USDA zone 8b, about 237 days between hard freezes, across 5K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 16
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~237
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 5K 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 Big Lake's average, not your lot's — a low corner or a tree line moves it. Against Big Lake's 237-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Big Lake
Each reading below is measured for Big Lake itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBig Lake runs about 237 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredBig Lake 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 Big Lake is in
Big Lake sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Big Lake's own centroid, and it is not what its county reads: Skagit County is mostly North Cascades. The wider page above you is answering a different question about different ground.
What Grows in Big Lake
Every plant below cleared Big Lake's own zone 8b and its 237-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Big Lake?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 16 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
What's on the federal record near Big Lake
Closest first, within ~10 miles of Big Lake. Listing isn't leaking, and distance isn't exposure.
- BIG LAKE GROCERYUnderground Storage Tanks · 850 ft
- BIG LAKE CENTRAL OFFICEUnderground Storage Tanks · 850 ft
- BIG LAKE RESORTUnderground Storage Tanks · 2500 ft
- YAEGER GROCERYUnderground Storage Tanks · 0.6 mi
- DEVILS MTN/B530650/DVMTWAQ0910Underground Storage Tanks · 0.9 mi
- LAKE MCMURRAY STOREUnderground Storage Tanks · 1.5 mi
- Big LakeMining · 1.8 mi
- MT VERNON COMPRESSOR STATIONUnderground Storage Tanks · 2.2 mi
- NORTHWEST PIPELINE GP MT VERNON C/SBrownfields · 2.2 mi
- ASSOCIATED PETROLEUM PRODUCTSUnderground Storage Tanks · 2.6 mi
- Mount Vernon DepositMining · 2.9 mi
- Mount VernonMining · 2.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Big Lake'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 Big Lake.
Total Sites
402
within ~10 miles of Big Lake
Risk Level
Elevated
Highest-severity
17 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Big Lake
Severity Distribution
within ~10 miles of Big Lake
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Big Lake, two things run higher than the national average within ~10 miles of Big Lake — CAFO (20 sites) and Underground Storage Tanks (247 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.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Big Lake
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 Big Lake average
Your land is one point inside Big Lake
Everything above resolves to Big Lake as a whole — one PHZM band and one 28°F frost record, read across 5K 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 Big Lake Average
Big Lake Average
- ●USDA Zones 8b, averaged across Big Lake
- ●One soil character for all of Big Lake
- ●Frost dates read at Big Lake's scale: Mar 24 to Nov 16
YOUR Parcel
- ✓Your exact zone, not Big Lake's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Big Lake
Pull a site-specific report for your exact address in Big Lake, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Big Lake averages can't show:
We read public map data around Big Lake — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Big Lake average
How we know this about Big Lake
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 Big Lake’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 Big Lake
When does frost risk typically end in Big Lake?
The last hard freeze (28°F) in Big Lake typically lands around Mar 24, 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 Apr 14.
When is the first frost in Big Lake?
The first hard freeze (28°F) in Big Lake typically arrives around Nov 16, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 2, so the watching starts about Oct 17 — about 237 days after the spring freeze cleared.
How long is the growing season in Big Lake?
Measured between 28°F hard freezes, Big Lake sees about 237 frost-free days — roughly Mar 24 through Nov 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 2, about 202 days.
Is the soil safe to grow vegetables in Big Lake?
The federal record around Big Lake is a meaningful one — 402 documented sites, mostly Underground Storage Tanks entries (247), 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 I protect my plants from frost in Big Lake?
From about Oct 17 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 16 (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 16. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Big Lake's scale — its 8b band and its 237-day season. Your yard writes its own version of Big Lake'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 Big Lake’s own scale
6 of the readings below were taken at Big Lake's own scale — its own ~237-day season between 28°F freezes, the 4,906 acres it covers and 402 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Big Lake's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Big Lake's own 28°F hard-freeze dates, about Mar 24 and Nov 16 and the ~237-day span between themNOAA 1991–2020 Climate Normals
- 402 documented contamination sites on the federal record near Big Lake, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Big Lake's boundary and the 4,906 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~237-day seasonGrowable Ground crop-matching engine
- Big Lake 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 Big Lake's 4,906 acres read through its county's SSURGO summaryfrom Skagit County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Skagit 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 Skagit County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Big Lake's 4,906 acreswhy one lot differs from the next →
- Which side of Big Lake you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,906 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 Big Lake-wide figureread your own land →
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