Leavenworth, Washington, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
The conditions favor cabbage, pawpaw, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Leavenworth, 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 Leavenworth 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 Leavenworth — soil, climate, flood, and parcel records. How we handle your address.
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Leavenworth — the short answer
Leavenworth, Washington: USDA zone 7a, about 199 days between hard freezes, across 930 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~199
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 930 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 7a is Leavenworth's average, not your lot's — a low corner or a tree line moves it. Against Leavenworth's 199-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Leavenworth
Each reading below is measured for Leavenworth itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLeavenworth runs about 199 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredLeavenworth sits in USDA hardiness zone 7a.
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 Leavenworth is in
Leavenworth sits in the North Cascades — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Leavenworth's own centroid rather than borrowed from Chelan County.
What Grows in Leavenworth
Every plant below cleared Leavenworth's own zone 7a and its 199-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Leavenworth?
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 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Leavenworth
Closest first, within ~10 miles of Leavenworth. Listing isn't leaking, and distance isn't exposure.
- LEAVENWORTH CENTRAL OFFICE (4380-B01)Underground Storage Tanks · 350 ft
- CASCADE MEDICAL CENTERUnderground Storage Tanks · 650 ft
- ADMINISTRATION BUILDINGUnderground Storage Tanks · 900 ft
- VILLAGE MERCANTILE INCUnderground Storage Tanks · 950 ft
- LEAVENWORTH FRUIT COMPANYUnderground Storage Tanks · 1200 ft
- KRISTALLS RESTAURANTUnderground Storage Tanks · 1300 ft
- USDA USFS R06 LEAVENWORTH RANGER STATIONSuperfund · 1300 ft
- IRVING J CONKLING & KAY A CONKLINGUnderground Storage Tanks · 1300 ft
- USDA FOREST SERVICEUnderground Storage Tanks · 1300 ft
- BURLINGTON NORTHERN RAILROADUnderground Storage Tanks · 1400 ft
- BURLINGTON NORTHERN RAILROAD MERRITUnderground Storage Tanks · 1400 ft
- BUS GARAGEUnderground Storage Tanks · 1500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Leavenworth'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 Leavenworth.
Total Sites
54
within ~10 miles of Leavenworth
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Leavenworth
Severity Distribution
within ~10 miles of Leavenworth
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Leavenworth, Underground Storage Tanks runs higher than the national average — 47 sites within ~10 miles of Leavenworth. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Leavenworth
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 Leavenworth average
Your land is one point inside Leavenworth
Everything above resolves to Leavenworth as a whole — one PHZM band and one 28°F frost record, read across 930 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 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 Leavenworth Average
Leavenworth Average
- ●USDA Zones 7a, averaged across Leavenworth
- ●One soil character for all of Leavenworth
- ●Frost dates read at Leavenworth's scale: Apr 7 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Leavenworth's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Leavenworth
Pull a site-specific report for your exact address in Leavenworth, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Leavenworth averages can't show:
We read public map data around Leavenworth — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Leavenworth average
How we know this about Leavenworth
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 Leavenworth’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 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 Leavenworth
When does frost risk typically end in Leavenworth?
The last hard freeze (28°F) in Leavenworth typically lands around Apr 7, 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 28.
When is the first frost in Leavenworth?
The first hard freeze (28°F) in Leavenworth typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 199 days after the spring freeze cleared.
How long is the growing season in Leavenworth?
Measured between 28°F hard freezes, Leavenworth sees about 199 frost-free days — roughly Apr 7 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 28 to Oct 9, about 164 days.
Is the soil safe to grow vegetables in Leavenworth?
The federal record around Leavenworth is a meaningful one — 54 documented sites, mostly Underground Storage Tanks entries (47), the nearest Underground Storage Tanks record under a tenth of a mile 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 Leavenworth?
From about Sep 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 Oct 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 Oct 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Leavenworth's scale — its 7a band and its 199-day season. Your yard writes its own version of Leavenworth'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 Leavenworth’s own scale
6 of the readings below were taken at Leavenworth's own scale — its own ~199-day season between 28°F freezes, the 930 acres it covers and 54 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Leavenworth's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Leavenworth's own 28°F hard-freeze dates, about Apr 7 and Oct 23 and the ~199-day span between themNOAA 1991–2020 Climate Normals
- 54 documented contamination sites on the federal record near Leavenworth, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Leavenworth's boundary and the 930 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~199-day seasonGrowable Ground crop-matching engine
- The ecoregion at Leavenworth's own centroid, the North CascadesUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Leavenworth's 930 acres read through its county's SSURGO summaryfrom Chelan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Chelan 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 Chelan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Leavenworth's 930 acreswhy one lot differs from the next →
- Which side of Leavenworth you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 930 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Leavenworth-wide figureread your own land →