Webster, Pennsylvania, sits in USDA hardiness zone 6b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — cabbage, hazelnut, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Webster, 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 Webster 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 Webster — soil, climate, flood, and parcel records. How we handle your address.
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Webster — the short answer
Webster, Pennsylvania: USDA zone 6b, about 220 days between hard freezes, across 376 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 376 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 6b is Webster's average, not your lot's — a low corner or a tree line moves it. Against Webster's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Webster
Each reading below is measured for Webster itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWebster runs about 220 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
MeasuredWebster sits in USDA hardiness zone 6b.
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 Webster is in
Webster sits in the Western Allegheny Plateau — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Webster's own centroid rather than borrowed from Westmoreland County.
What Grows in Webster
Every plant below cleared Webster's own zone 6b and its 220-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Webster?
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 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — 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.
Documented around Webster
Spotted lanternfly documented 2 miles from Webster, first recorded 2020. What to watch for.
What's on the federal record near Webster
Closest first, within ~10 miles of Webster. Listing isn't leaking, and distance isn't exposure.
- AIR LIQUIDE AMER CORP/DONORABrownfields · 1800 ft
- DYNO NOBEL INC (DONORA PLANT)Toxics Release Inventory · 2100 ft
- DYNO NOBEL INC (DONORA PLANT)Brownfields · 2100 ft
- LAROCHE INDUnderground Storage Tanks · 2100 ft
- ELLIOTT CO SUPPORT SERVICESBrownfields · 2300 ft
- AIRGAS SPECIALTY PRODUCTSToxics Release Inventory · 2400 ft
- AIRGASToxics Release Inventory · 2400 ft
- ERNEST CERINIUnderground Storage Tanks · 0.5 mi
- FORMER BP SITE 07176Underground Storage Tanks · 0.7 mi
- RICHS AMOCOUnderground Storage Tanks · 0.7 mi
- TOMS AUTO CTRUnderground Storage Tanks · 0.7 mi
- UNI MARTUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Webster'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 Webster.
Sources Checked
within ~10 miles of Webster
Severity Distribution
within ~10 miles of Webster
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •TRI facilities report what they release. Check the wind — downwind beds catch more of it.
Check your specific parcel in Webster
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 Webster average
Your land is one point inside Webster
Everything above resolves to Webster as a whole — one PHZM band and one 28°F frost record, read across 376 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 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 Webster Average
Webster Average
- ●USDA Zones 6b, averaged across Webster
- ●One soil character for all of Webster
- ●Frost dates read at Webster's scale: Apr 3 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Webster's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Webster
Pull a site-specific report for your exact address in Webster, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Webster averages can't show:
We read public map data around Webster — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Webster average
How we know this about Webster
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 Webster’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 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 Webster
When does frost risk typically end in Webster?
The last hard freeze (28°F) in Webster typically lands around Apr 3, 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 24.
When is the first frost in Webster?
The first hard freeze (28°F) in Webster typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 220 days after the spring freeze cleared.
How long is the growing season in Webster?
Measured between 28°F hard freezes, Webster sees about 220 frost-free days — roughly Apr 3 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 24 to Oct 26, about 185 days.
Is the soil safe to grow vegetables in Webster?
The federal record around Webster is a meaningful one — 757 documented sites, mostly Underground Storage Tanks entries (411), the nearest Brownfields 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 Webster?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Webster's scale — its 6b band and its 220-day season. Your yard writes its own version of Webster'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 Webster’s own scale
7 of the readings below were taken at Webster's own scale — its own ~220-day season between 28°F freezes, the 376 acres it covers and 757 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Webster's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Webster's own 28°F hard-freeze dates, about Apr 3 and Nov 9 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 757 documented contamination sites on the federal record near Webster, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Webster's boundary and the 376 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~220-day seasonGrowable Ground crop-matching engine
- The ecoregion at Webster's own centroid, the Western Allegheny PlateauUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Websterlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Webster's 376 acres read through its county's SSURGO summaryfrom Westmoreland County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Westmoreland County
- The growing challenges every Pennsylvania grower plans around — written at state scale, so they stay on the state guidefrom Pennsylvania
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Westmoreland County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Webster's 376 acreswhy one lot differs from the next →
- Which side of Webster you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 376 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Webster-wide figureread your own land →
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