Westchester County, in New York, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit cabbage, hazelnut, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Westchester County lies within the Hudson Valley — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Westchester County holds more than one microclimate.
Soils and elevations shift across Westchester County, so your frost dates and drainage aren't the county average. 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 Westchester County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Westchester County — the short answer
Westchester County, New York: USDA zone 7a, about 225 days between hard freezes, across 276K acres.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 1
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 12
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~225
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 276K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Westchester County's average, not your lot's — a low corner or a tree line moves it. Against Westchester County's 225-day season, see what your own ground reads.
Heat in Westchester County
Across a year, Westchester County accumulates about 2,905 growing degree days above 50°F, about 669 more than the middle New York county — ahead of 54 of New York’s 62 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Westchester County
Across Westchester County, the ground is predominantly Inceptisols, where Charlton, Chatfield, and Paxton are the most extensive named soil series. The soil is generally well drained with a fine sandy loam surface. Topsoil pH runs about 4.8–5.5, strongly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Inceptisols
Drainage
Well drained
Prime farmland
13%
Hydric soils
9%
Soil still varies lot by lot — soil types explained.
How the ground varies across Westchester County
The USDA soil survey maps 52% of Westchester County as well drained — but another 20% drains differently: 7% moderately well drained, 4% poorly drained.
Charlton is the most extensive named soil at 30% of mapped acres, then Chatfield (18%) and Paxton (18%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Westchester County
Each reading below is measured for Westchester County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Westchester County are well drained, in hydrologic group B — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Westchester County runs about pH 4.8–5.5, on the acidic side.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Season length
MeasuredWestchester County runs about 225 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
MeasuredWestchester County 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 Westchester County is in
Westchester County sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. One consistent ecological setting across the whole county.
What Grows in Westchester County
We scored all 1,086 plants against Westchester County's own USDA zone 7a and its own 225-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's New York profile.
Is it too late to plant in Westchester County?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 12 — 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.
Documented around Westchester County
Spotted lanternfly documented 2 miles from Westchester County, first recorded 2023. What to watch for.
- Japanese beetle32 documented records
- monarch butterfly195 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Westchester County
USGS estimates 82 lb of 2,4-d on Westchester County farmland in 2019, its largest by weight, ahead of Glyphosate (78 lb) and Atrazine (69 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Westchester County — and how to grow with it.
We checked the federal record across Westchester County — 1,648 documented sites across 8 of the 9 source types we track.
The most significant on record: 15 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Westchester County carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Westchester County
Closest first, across Westchester County. Listing isn't leaking, and distance isn't exposure.
- NEW CASTLE AUTO CENTER, INC.Brownfields · 1.1 mi
- WE3866Nitrate · 1.4 mi
- CHAPPAQUA CLEANERS & TAILORSBrownfields · 1.4 mi
- FRANK & CARLS CLEANERSBrownfields · 1.5 mi
- METRO-NORTH CHAPPAQUA RAILROAD STATIONBrownfields · 1.5 mi
- CHAPPAQUA TRANSPORTATION INCBrownfields · 1.5 mi
- NEW CASTLE CLEANERSBrownfields · 1.5 mi
- CHAPPAQUA CENTRAL SCHOOL DISTBrownfields · 1.7 mi
- VILLAGE OF PLEASANTVILLE WATER STORAGEBrownfields · 1.8 mi
- FORDHAM UNIVERSITY - LOUIS CALDER CENTERBrownfields · 1.8 mi
- PLEASANTVILLE MUNICIPAL POOL COMPLEXUnderground Storage Tanks · 1.9 mi
- NYCDEP PLEASANTVILLE ALUMBrownfields · 1.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Westchester County'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 Westchester County.
Sources Checked
across Westchester County
Severity Distribution
across Westchester County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Westchester County, two things run higher than the national average across Westchester County — PFAS (29 sites) and Brownfields (1,260 sites). That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Westchester County
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 Westchester County average
Your land is one point inside Westchester County
Everything above resolves to Westchester County as a whole — one PHZM band and one county frost record, read across 276K 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 county 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 county average.
Your Lot vs the Westchester County Average
Westchester County Average
- ●USDA Zones 7a, averaged across Westchester County
- ●One soil character for all of Westchester County
- ●Frost dates read at Westchester County's scale: Apr 1 to Nov 12
YOUR Parcel
- ✓Your exact zone, not Westchester County's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Westchester County
Pull a site-specific report for your exact address in Westchester County, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Westchester County averages can't show:
We read public map data around Westchester County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Westchester County average
How we know this about Westchester County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Westchester County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Westchester County
When does frost risk typically end in Westchester County?
The last hard freeze (28°F) in Westchester County typically lands around Apr 1, 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 22.
How long is the growing season in Westchester County?
Measured between 28°F hard freezes, Westchester County sees about 225 frost-free days — roughly Apr 1 through Nov 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 29, about 190 days.
Is the soil safe to grow vegetables in Westchester County?
The federal record around Westchester County runs heavier than most — 1,648 documented sites, mostly Brownfields entries (1,260), the nearest Brownfields record about 1.1 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.
Everything above is measured at Westchester County's scale — its 7a band and its 225-day season. Your yard writes its own version of Westchester County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads New York's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Westchester County’s own scale
9 of the readings below were taken at Westchester County's own scale — its own ~225-day span between 28°F freezes, the 3 most extensive soil series mapped here and 1,648 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Westchester County's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Westchester County's own 28°F hard-freeze dates and its ~225-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Westchester CountyUSDA NRCS SSURGO
- 1,648 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Brownfields record about 1.1 miles outFederal environmental registers
- Westchester County's boundary and the 275,723 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~225-day seasonGrowable Ground crop-matching engine
- Westchester County sitting wholly inside the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- Open occurrence records documented in Westchester County for 2 tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Westchester County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every New York grower plans around — written at state scale, so they stay on the state guidefrom New York
What this page can’t tell you
- How the season shifts across Westchester County — the ~225 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Westchester County's 275,723 acreswhy one lot differs from the next →
- Which of those 1,648 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Westchester Countyread your own land →