Key Center, Washington, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
A short list that earns its place here — cabbage, fig, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Key Center, 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 Key Center 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 Key Center — soil, climate, flood, and parcel records. How we handle your address.
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Key Center — the short answer
Key Center, Washington: USDA zone 8b, about 264 days between hard freezes, across 9K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 4
- Pierce County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 23
- Pierce County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~264
- Pierce County normal — NOAA 1991–2020, nearest to this town
- Town area
- 9K 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 Pierce County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Key Center's average, not your lot's — a low corner or a tree line moves it. Against Key Center's 264-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Key Center
Each reading below is measured for Key Center itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsKey Center runs about 264 days between hard freezes (read from Pierce County, the closest normal to Key Center) — 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
MeasuredKey Center 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 Key Center is in
Key Center sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Key Center's own centroid, and it is not what its county reads: Pierce County is mostly Cascades. The wider page above you is answering a different question about different ground.
What Grows in Key Center
Every plant below cleared Key Center's own zone 8b and its 264-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Key Center?
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 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 23 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
What's on the federal record near Key Center
Closest first, within ~10 miles of Key Center. Listing isn't leaking, and distance isn't exposure.
- PENROSE POINT STATE PARKUnderground Storage Tanks · 1700 ft
- FIRE DIST #16 PIERCE COUNTYUnderground Storage Tanks · 0.6 mi
- KEY CENTER SHELLUnderground Storage Tanks · 0.8 mi
- 21N/01W-02C01Nitrate · 1.2 mi
- GLEN COVE MARINAUnderground Storage Tanks · 1.3 mi
- 22N/01E-32P06 SU-009Nitrate · 2.4 mi
- FRIENDLY FOOD MARTUnderground Storage Tanks · 2.7 mi
- CHARLES W SEHMEL LOGGINGUnderground Storage Tanks · 3.0 mi
- KOPACHUCK STATE PARKUnderground Storage Tanks · 3.5 mi
- COLLINS SERVICE & GROCERYUnderground Storage Tanks · 3.6 mi
- HAVEN OF RESTUnderground Storage Tanks · 3.6 mi
- FAIR HARBOR MARINE AND RESORTUnderground Storage Tanks · 3.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Key Center'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 Key Center.
Total Sites
199
within ~10 miles of Key Center
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Key Center
Severity Distribution
within ~10 miles of Key Center
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Key Center, two things run higher than the national average within ~10 miles of Key Center — PFAS (4 sites) and Underground Storage Tanks (137 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Key Center
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 Key Center average
Your land is one point inside Key Center
Everything above resolves to Key Center as a whole — one PHZM band, read across 9K acres, with hard-freeze dates borrowed from Pierce 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 Key Center Average
Key Center Average
- ●USDA Zones 8b, averaged across Key Center
- ●One soil character for all of Key Center
- ●Frost dates read at Key Center's scale: Mar 4 to Nov 23
YOUR Parcel
- ✓Your exact zone, not Key Center's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Key Center
Pull a site-specific report for your exact address in Key Center, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Key Center averages can't show:
We read public map data around Key Center — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Key Center average
How we know this about Key Center
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 Pierce 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 Key Center
When does frost risk typically end in Key Center?
The last hard freeze (28°F) in Key Center typically lands around Mar 4, 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 25.
When is the first frost in Key Center?
The first hard freeze (28°F) in Key Center typically arrives around Nov 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 9, so the watching starts about Oct 24 — about 264 days after the spring freeze cleared.
How long is the growing season in Key Center?
Measured between 28°F hard freezes, Key Center sees about 264 frost-free days — roughly Mar 4 through Nov 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 25 to Nov 9, about 229 days.
Is the soil safe to grow vegetables in Key Center?
The federal record around Key Center is a meaningful one — 199 documented sites, mostly Underground Storage Tanks entries (137), the nearest Underground Storage Tanks record about 0.3 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 Key Center?
From about Oct 24 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Key Center's scale — its 8b band and its 264-day season. Your yard writes its own version of Key Center'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 Key Center’s own scale
5 of the readings below were taken at Key Center's own scale — the 9,361 acres it covers and 199 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Key Center's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 199 documented contamination sites on the federal record near Key Center, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Key Center's boundary and the 9,361 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~264-day seasonGrowable Ground crop-matching engine
- Key Center 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 — Key Center has no normal of its own, so its county's is the closest measured readfrom Pierce County
- Soil character — no town-scale survey exists, so Key Center's 9,361 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 Key Center's 9,361 acreswhy one lot differs from the next →
- Which side of Key Center you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 9,361 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Key Center-wide figureread your own land →
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