Allenwood, Pennsylvania, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Among the crops suited to this profile: cabbage, hazelnut, lavender, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Allenwood, 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 Allenwood 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 Allenwood — soil, climate, flood, and parcel records. How we handle your address.
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Allenwood — the short answer
Allenwood, Pennsylvania: USDA zone 6b, about 210 days between hard freezes, across 376 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~210
- 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 Allenwood's average, not your lot's — a low corner or a tree line moves it. Against Allenwood's 210-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Allenwood
Each reading below is measured for Allenwood itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAllenwood runs about 210 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
MeasuredAllenwood 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 Allenwood is in
Allenwood sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Allenwood's own centroid rather than borrowed from Union County.
What Grows in Allenwood
Every plant below cleared Allenwood's own zone 6b and its 210-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Allenwood?
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 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 2 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Allenwood
Spotted lanternfly documented 3 miles from Allenwood, first recorded 2021. What to watch for.
What's on the federal record near Allenwood
Closest first, within ~10 miles of Allenwood. Listing isn't leaking, and distance isn't exposure.
- JIM CLARK PROPUnderground Storage Tanks · 150 ft
- SGL 252Underground Storage Tanks · 500 ft
- 7 ELEVEN 40231Underground Storage Tanks · 1200 ft
- JAY BECK FUELSUnderground Storage Tanks · 1300 ft
- UN 100Nitrate · 1300 ft
- OMAAA TRUCK STOPUnderground Storage Tanks · 0.5 mi
- ALLENWOOD RENTAL & SUPPLYUnderground Storage Tanks · 0.5 mi
- ALLENWOOD EQUIPUnderground Storage Tanks · 0.5 mi
- WEAVERS SUNSETUnderground Storage Tanks · 0.5 mi
- WHITE DEER RUNUnderground Storage Tanks · 1.0 mi
- NU 19Nitrate · 1.1 mi
- NU TEC TOOLING CO INCUnderground Storage Tanks · 1.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Allenwood'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 Allenwood.
Total Sites
512
within ~10 miles of Allenwood
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Allenwood
Severity Distribution
within ~10 miles of Allenwood
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Allenwood, two things run higher than the national average within ~10 miles of Allenwood — CAFO (7 sites) and Toxics Release Inventory (38 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Allenwood
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 Allenwood average
Your land is one point inside Allenwood
Everything above resolves to Allenwood 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 Allenwood Average
Allenwood Average
- ●USDA Zones 6b, averaged across Allenwood
- ●One soil character for all of Allenwood
- ●Frost dates read at Allenwood's scale: Apr 6 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Allenwood's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Allenwood
Pull a site-specific report for your exact address in Allenwood, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Allenwood averages can't show:
We read public map data around Allenwood — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Allenwood average
How we know this about Allenwood
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 Allenwood’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 Allenwood
When does frost risk typically end in Allenwood?
The last hard freeze (28°F) in Allenwood typically lands around Apr 6, 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 27.
When is the first frost in Allenwood?
The first hard freeze (28°F) in Allenwood typically arrives around Nov 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 19, so the watching starts about Oct 3 — about 210 days after the spring freeze cleared.
How long is the growing season in Allenwood?
Measured between 28°F hard freezes, Allenwood sees about 210 frost-free days — roughly Apr 6 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 27 to Oct 19, about 175 days.
Is the soil safe to grow vegetables in Allenwood?
The federal record around Allenwood is a meaningful one — 512 documented sites, mostly Underground Storage Tanks entries (275), 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 Allenwood?
From about Oct 3 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 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Allenwood's scale — its 6b band and its 210-day season. Your yard writes its own version of Allenwood'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 Allenwood’s own scale
7 of the readings below were taken at Allenwood's own scale — its own ~210-day season between 28°F freezes, the 376 acres it covers and 512 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Allenwood's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Allenwood's own 28°F hard-freeze dates, about Apr 6 and Nov 2 and the ~210-day span between themNOAA 1991–2020 Climate Normals
- 512 documented contamination sites on the federal record near Allenwood, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Allenwood's boundary and the 376 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~210-day seasonGrowable Ground crop-matching engine
- The ecoregion at Allenwood's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Allenwoodlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Allenwood's 376 acres read through its county's SSURGO summaryfrom Union County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Union 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 Union County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Allenwood's 376 acreswhy one lot differs from the next →
- Which side of Allenwood 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 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 Allenwood-wide figureread your own land →
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