Clyde Hill, 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.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Clyde Hill, 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 Clyde Hill 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 Clyde Hill — soil, climate, flood, and parcel records. How we handle your address.
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Clyde Hill — the short answer
Clyde Hill, Washington: USDA zone 8b, about 252 days between hard freezes, across 675 acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 14
- King County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 21
- King County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~252
- King County normal — NOAA 1991–2020, nearest to this town
- City area
- 675 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 King County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Clyde Hill's average, not your lot's — a low corner or a tree line moves it. Against Clyde Hill's 252-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Clyde Hill
Each reading below is measured for Clyde Hill itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsClyde Hill runs about 252 days between hard freezes (read from King County, the closest normal to Clyde Hill) — 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
MeasuredClyde Hill 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 Clyde Hill is in
Clyde Hill sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Clyde Hill's own centroid rather than borrowed from King County.
What Grows in Clyde Hill
Every plant below cleared Clyde Hill's own zone 8b and its 252-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Clyde Hill?
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 Feb 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 21 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Clyde Hill
Closest first, within ~10 miles of Clyde Hill. Listing isn't leaking, and distance isn't exposure.
- BELLEVUE SCHOOL DIST CLYDE HILUnderground Storage Tanks · 1200 ft
- BELLEVUE FIRE STATION 5Underground Storage Tanks · 1200 ft
- BELLEVUE CHRISTIAN SCHOOLUnderground Storage Tanks · 0.5 mi
- MY GOODS MARKET #5478Underground Storage Tanks · 0.6 mi
- WA DOT SR 520 PROJECT GAS USTUnderground Storage Tanks · 0.6 mi
- GROUP HEALTH BELLEVUE MEDICAL CENTERUnderground Storage Tanks · 0.7 mi
- CHEVRON USA INC SS 97451Brownfields · 0.8 mi
- QFCBrownfields · 0.8 mi
- CHEVRON 97451Underground Storage Tanks · 0.8 mi
- MEDINA CHEVRONUnderground Storage Tanks · 0.8 mi
- OVERLAKE GOLF AND COUNTRY CLUBUnderground Storage Tanks · 0.9 mi
- UNDEVELOPEDUnderground Storage Tanks · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Clyde Hill'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 Clyde Hill.
Sources Checked
within ~10 miles of Clyde Hill
Severity Distribution
within ~10 miles of Clyde Hill
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Clyde Hill, Underground Storage Tanks runs higher than the national average — 2,444 sites within ~10 miles of Clyde Hill. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Clyde Hill
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 Clyde Hill average
Your land is one point inside Clyde Hill
Everything above resolves to Clyde Hill as a whole — one PHZM band, read across 675 acres, with hard-freeze dates borrowed from King 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 Clyde Hill Average
Clyde Hill Average
- ●USDA Zones 8b, averaged across Clyde Hill
- ●One soil character for all of Clyde Hill
- ●Frost dates read at Clyde Hill's scale: Mar 14 to Nov 21
YOUR Parcel
- ✓Your exact zone, not Clyde Hill's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Clyde Hill
Pull a site-specific report for your exact address in Clyde Hill, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Clyde Hill averages can't show:
We read public map data around Clyde Hill — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Clyde Hill average
How we know this about Clyde Hill
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 King 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 Clyde Hill
When does frost risk typically end in Clyde Hill?
The last hard freeze (28°F) in Clyde Hill typically lands around Mar 14, 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 4.
When is the first frost in Clyde Hill?
The first hard freeze (28°F) in Clyde Hill typically arrives around Nov 21, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 7, so the watching starts about Oct 22 — about 252 days after the spring freeze cleared.
How long is the growing season in Clyde Hill?
Measured between 28°F hard freezes, Clyde Hill sees about 252 frost-free days — roughly Mar 14 through Nov 21, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 4 to Nov 7, about 217 days.
Is the soil safe to grow vegetables in Clyde Hill?
The federal record around Clyde Hill runs heavier than most — 3,756 documented sites, mostly Underground Storage Tanks entries (2,444), the nearest Underground Storage Tanks record about 0.2 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Clyde Hill?
From about Oct 22 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 21 (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 21. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Clyde Hill's scale — its 8b band and its 252-day season. Your yard writes its own version of Clyde Hill'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 Clyde Hill’s own scale
5 of the readings below were taken at Clyde Hill's own scale — the 675 acres it covers and 3,756 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Clyde Hill's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 3,756 documented contamination sites on the federal record near Clyde Hill, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Clyde Hill's boundary and the 675 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~252-day seasonGrowable Ground crop-matching engine
- The ecoregion at Clyde Hill's own centroid, the Puget LowlandUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Clyde Hill has no normal of its own, so its county's is the closest measured readfrom King County
- Soil character — no town-scale survey exists, so Clyde Hill's 675 acres read through its county's SSURGO summaryfrom King County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom King 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 King County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Clyde Hill's 675 acreswhy one lot differs from the next →
- Which side of Clyde Hill you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 675 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 Clyde Hill-wide figureread your own land →
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