Glen Osborne, Pennsylvania, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Well-matched crops include cabbage, hazelnut, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Glen Osborne, 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 Glen Osborne 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 Glen Osborne — soil, climate, flood, and parcel records. How we handle your address.
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Glen Osborne — the short answer
Glen Osborne, Pennsylvania: USDA zone 6b, about 228 days between hard freezes, across 275 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~228
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 275 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 Glen Osborne's average, not your lot's — a low corner or a tree line moves it. Against Glen Osborne's 228-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glen Osborne
Each reading below is measured for Glen Osborne itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlen Osborne runs about 228 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
MeasuredGlen Osborne 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 Glen Osborne is in
Glen Osborne sits in the Western Allegheny Plateau — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Glen Osborne's own centroid rather than borrowed from Allegheny County.
What Grows in Glen Osborne
Every plant below cleared Glen Osborne's own zone 6b and its 228-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Glen Osborne?
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 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 31 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 14 — 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 Glen Osborne
Spotted lanternfly documented 3 miles from Glen Osborne, first recorded 2019. What to watch for.
What's on the federal record near Glen Osborne
Closest first, within ~10 miles of Glen Osborne. Listing isn't leaking, and distance isn't exposure.
- US COAST GUARD SSD SEWICKLEYBrownfields · 2000 ft
- CORAOPOLIS SOUTH TERMUnderground Storage Tanks · 2500 ft
- AG 500Nitrate · 2500 ft
- STERLING GROUPToxics Release Inventory · 0.5 mi
- BUCKEYE - CORAOPOLIS TERMINAL 2Brownfields · 0.6 mi
- BUCKEYE - CORAOPOLIS TERMINAL 2Toxics Release Inventory · 0.6 mi
- PITTSBURGH FORGINGS COToxics Release Inventory · 0.6 mi
- PITTSBURGH FORGINGS COBrownfields · 0.6 mi
- RIVERSIDE BLDR SUPPLYUnderground Storage Tanks · 0.6 mi
- STUDENT TRANSP OF AMERICABrownfields · 0.6 mi
- EXXON RS 2 1266Underground Storage Tanks · 0.6 mi
- CORAOPOLIS COLLISION & REPAIR SVCBrownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Glen Osborne'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 Glen Osborne.
Total Sites
1,693
within ~10 miles of Glen Osborne
Risk Level
Elevated
Highest-severity
11 Superfund sites
Sources Checked
within ~10 miles of Glen Osborne
Severity Distribution
within ~10 miles of Glen Osborne
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 Glen Osborne
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 Glen Osborne average
Your land is one point inside Glen Osborne
Everything above resolves to Glen Osborne as a whole — one PHZM band and one 28°F frost record, read across 275 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 Glen Osborne Average
Glen Osborne Average
- ●USDA Zones 6b, averaged across Glen Osborne
- ●One soil character for all of Glen Osborne
- ●Frost dates read at Glen Osborne's scale: Mar 31 to Nov 14
YOUR Parcel
- ✓Your exact zone, not Glen Osborne's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glen Osborne
Pull a site-specific report for your exact address in Glen Osborne, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glen Osborne averages can't show:
We read public map data around Glen Osborne — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glen Osborne average
How we know this about Glen Osborne
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 Glen Osborne’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 Glen Osborne
When does frost risk typically end in Glen Osborne?
The last hard freeze (28°F) in Glen Osborne typically lands around Mar 31, 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 21.
When is the first frost in Glen Osborne?
The first hard freeze (28°F) in Glen Osborne typically arrives around Nov 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 31, so the watching starts about Oct 15 — about 228 days after the spring freeze cleared.
How long is the growing season in Glen Osborne?
Measured between 28°F hard freezes, Glen Osborne sees about 228 frost-free days — roughly Mar 31 through Nov 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 31, about 193 days.
Is the soil safe to grow vegetables in Glen Osborne?
The federal record around Glen Osborne is a meaningful one — 1,693 documented sites, mostly Underground Storage Tanks entries (788), the nearest Brownfields record about 0.4 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 Glen Osborne?
From about Oct 15 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 14 (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 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Glen Osborne's scale — its 6b band and its 228-day season. Your yard writes its own version of Glen Osborne'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 Glen Osborne’s own scale
7 of the readings below were taken at Glen Osborne's own scale — its own ~228-day season between 28°F freezes, the 275 acres it covers and 1,693 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glen Osborne's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Glen Osborne's own 28°F hard-freeze dates, about Mar 31 and Nov 14 and the ~228-day span between themNOAA 1991–2020 Climate Normals
- 1,693 documented contamination sites on the federal record near Glen Osborne, the closest Brownfields record about 0.4 miles out from the town centreFederal environmental registers
- Glen Osborne's boundary and the 275 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~228-day seasonGrowable Ground crop-matching engine
- The ecoregion at Glen Osborne's own centroid, the Western Allegheny PlateauUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Glen Osbornelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glen Osborne's 275 acres read through its county's SSURGO summaryfrom Allegheny County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Allegheny 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 Allegheny County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glen Osborne's 275 acreswhy one lot differs from the next →
- Which side of Glen Osborne you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 275 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.4 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 Glen Osborne-wide figureread your own land →