Cathcart, Washington, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Crops well matched to these conditions include cabbage, fig, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Cathcart, 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 Cathcart 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 Cathcart — soil, climate, flood, and parcel records. How we handle your address.
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Cathcart — the short answer
Cathcart, Washington: USDA zone 8b, about 208 days between hard freezes, across 2K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- Snohomish County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 9
- Snohomish County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~208
- Snohomish County normal — NOAA 1991–2020, nearest to this town
- Town area
- 2K 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 Snohomish County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Cathcart's average, not your lot's — a low corner or a tree line moves it. Against Cathcart's 208-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Cathcart
Each reading below is measured for Cathcart itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsCathcart runs about 208 days between hard freezes (read from Snohomish County, the closest normal to Cathcart) — 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
MeasuredCathcart 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 Cathcart is in
Cathcart sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Cathcart's own centroid, and it is not what its county reads: Snohomish County is mostly North Cascades. The wider page above you is answering a different question about different ground.
What Grows in Cathcart
Every plant below cleared Cathcart's own zone 8b and its 208-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Cathcart?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Cathcart
Closest first, within ~10 miles of Cathcart. Listing isn't leaking, and distance isn't exposure.
- ERIC A HOVDE DBA CATHCART STOREUnderground Storage Tanks · 2400 ft
- CATHCART STATIONUnderground Storage Tanks · 0.5 mi
- SNOHOMISH COUNTY PARKSUnderground Storage Tanks · 0.7 mi
- EXPRESS STOPUnderground Storage Tanks · 0.8 mi
- CROSS VALLEY WATER DISTRICTPFAS · 0.8 mi
- SILVER LAKE WATER & SEWER DISTRICTPFAS · 0.8 mi
- SNOHOMISH COUNTYUnderground Storage Tanks · 0.9 mi
- 27N/05E-02Q01Nitrate · 1.2 mi
- HAGGEN OPCO NORTH LLC SNOHOMISHBrownfields · 1.3 mi
- SNOHOMISH REGIONAL LANDFILLBrownfields · 1.3 mi
- CLEARVIEW CENTRAL OFFICE 2290-B01Underground Storage Tanks · 1.3 mi
- 28N/05E-36F01Nitrate · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Cathcart'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 Cathcart.
Total Sites
1,479
within ~10 miles of Cathcart
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Cathcart
Severity Distribution
within ~10 miles of Cathcart
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Cathcart
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 Cathcart average
Your land is one point inside Cathcart
Everything above resolves to Cathcart as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Snohomish County’s record because no 30-year normal resolves at this town’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 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 Cathcart Average
Cathcart Average
- ●USDA Zones 8b, averaged across Cathcart
- ●One soil character for all of Cathcart
- ●Frost dates read at Cathcart's scale: Apr 15 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Cathcart's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Cathcart
Pull a site-specific report for your exact address in Cathcart, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Cathcart averages can't show:
We read public map data around Cathcart — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Cathcart average
How we know this about Cathcart
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 Snohomish 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 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 Cathcart
When does frost risk typically end in Cathcart?
The last hard freeze (28°F) in Cathcart typically lands around Apr 15, 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 May 6.
When is the first frost in Cathcart?
The first hard freeze (28°F) in Cathcart typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 208 days after the spring freeze cleared.
How long is the growing season in Cathcart?
Measured between 28°F hard freezes, Cathcart sees about 208 frost-free days — roughly Apr 15 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 26, about 173 days.
Is the soil safe to grow vegetables in Cathcart?
The federal record around Cathcart is a meaningful one — 1,479 documented sites, mostly Underground Storage Tanks entries (773), 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 Cathcart?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Cathcart's scale — its 8b band and its 208-day season. Your yard writes its own version of Cathcart'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 Cathcart’s own scale
5 of the readings below were taken at Cathcart's own scale — the 2,473 acres it covers and 1,479 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Cathcart's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 1,479 documented contamination sites on the federal record near Cathcart, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Cathcart's boundary and the 2,473 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~208-day seasonGrowable Ground crop-matching engine
- Cathcart 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 — Cathcart has no normal of its own, so its county's is the closest measured readfrom Snohomish County
- Soil character — no town-scale survey exists, so Cathcart's 2,473 acres read through its county's SSURGO summaryfrom Snohomish County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Snohomish 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 Snohomish County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Cathcart's 2,473 acreswhy one lot differs from the next →
- Which side of Cathcart you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,473 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 Cathcart-wide figureread your own land →
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