Quincy, Washington, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Among the crops suited to this profile: cabbage, pawpaw, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Quincy, 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 Quincy 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 Quincy — soil, climate, flood, and parcel records. How we handle your address.
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Quincy — the short answer
Quincy, Washington: USDA zone 7a, about 207 days between hard freezes, across 4K acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~207
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 4K 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 Quincy's average, not your lot's — a low corner or a tree line moves it. Against Quincy's 207-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Quincy
Each reading below is measured for Quincy itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredQuincy runs about 207 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
MeasuredQuincy 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 Quincy is in
Quincy sits in the Columbia Plateau — EPA Level III, inside the wider North American Deserts. That is read at Quincy's own centroid rather than borrowed from Grant County.
What Grows in Quincy
Every plant below cleared Quincy's own zone 7a and its 207-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Quincy?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — 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 Quincy
Closest first, within ~10 miles of Quincy. Listing isn't leaking, and distance isn't exposure.
- SHORT STOP #4Underground Storage Tanks · 600 ft
- JACKPOT FOOD MARTUnderground Storage Tanks · 850 ft
- WITCO CORPUnderground Storage Tanks · 900 ft
- RON WEBER CHEVROLET COUnderground Storage Tanks · 950 ft
- STEELE T & THELMA FREERUnderground Storage Tanks · 950 ft
- INTERGATE QUINCY LLCUnderground Storage Tanks · 1000 ft
- 500 CENTRAL AVE S QUINCYUnderground Storage Tanks · 1200 ft
- COLEMAN OIL QUINCYBrownfields · 1300 ft
- COLEMAN OIL QUINCYToxics Release Inventory · 1300 ft
- JOHN D ENGLISH DBA BASIN OIL COUnderground Storage Tanks · 1400 ft
- NORTH CENTRAL PETROLEUM INC QUINCYUnderground Storage Tanks · 1400 ft
- QUINCY HIGH SCHOOLUnderground Storage Tanks · 1500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Quincy'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 Quincy.
Total Sites
131
within ~10 miles of Quincy
Risk Level
Moderate
Highest-severity
6 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Quincy
Severity Distribution
within ~10 miles of Quincy
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Quincy, Nitrate runs higher than the national average — 46 sites within ~10 miles of Quincy. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Quincy
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 Quincy average
Your land is one point inside Quincy
Everything above resolves to Quincy as a whole — one PHZM band and one 28°F frost record, read across 4K 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 Quincy Average
Quincy Average
- ●USDA Zones 7a, averaged across Quincy
- ●One soil character for all of Quincy
- ●Frost dates read at Quincy's scale: Apr 5 to Oct 29
YOUR Parcel
- ✓Your exact zone, not Quincy's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Quincy
Pull a site-specific report for your exact address in Quincy, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Quincy averages can't show:
We read public map data around Quincy — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Quincy average
How we know this about Quincy
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 Quincy’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 Quincy
When does frost risk typically end in Quincy?
The last hard freeze (28°F) in Quincy typically lands around Apr 5, 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 26.
When is the first frost in Quincy?
The first hard freeze (28°F) in Quincy typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 207 days after the spring freeze cleared.
How long is the growing season in Quincy?
Measured between 28°F hard freezes, Quincy sees about 207 frost-free days — roughly Apr 5 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 15, about 172 days.
Is the soil safe to grow vegetables in Quincy?
The federal record around Quincy shows 131 documented sites, mostly Underground Storage Tanks entries (67), the nearest Underground Storage Tanks record about 0.1 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Quincy?
From about Sep 29 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 29 (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 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Quincy's scale — its 7a band and its 207-day season. Your yard writes its own version of Quincy'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 Quincy’s own scale
6 of the readings below were taken at Quincy's own scale — its own ~207-day season between 28°F freezes, the 4,280 acres it covers and 131 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Quincy's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Quincy's own 28°F hard-freeze dates, about Apr 5 and Oct 29 and the ~207-day span between themNOAA 1991–2020 Climate Normals
- 131 documented contamination sites on the federal record near Quincy, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Quincy's boundary and the 4,280 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~207-day seasonGrowable Ground crop-matching engine
- The ecoregion at Quincy's own centroid, the Columbia PlateauUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Quincy's 4,280 acres read through its county's SSURGO summaryfrom Grant County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Grant 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 Grant County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Quincy's 4,280 acreswhy one lot differs from the next →
- Which side of Quincy you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,280 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Quincy-wide figureread your own land →
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