Lower Allen, Pennsylvania, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
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.
Even in Lower Allen, 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 Lower Allen 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 Lower Allen — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Lower Allen — the short answer
Lower Allen, Pennsylvania: USDA zone 7a, about 223 days between hard freezes, across 1K acres of town.
- USDA zone
- 7a
- 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 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~223
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Lower Allen's average, not your lot's — a low corner or a tree line moves it. Against Lower Allen's 223-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lower Allen
Each reading below is measured for Lower Allen itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLower Allen runs about 223 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
MeasuredLower Allen 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 Lower Allen is in
Lower Allen sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Lower Allen's own centroid rather than borrowed from Cumberland County.
What Grows in Lower Allen
Every plant below cleared Lower Allen's own zone 7a and its 223-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Lower Allen?
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 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 9 — 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 Lower Allen
Spotted lanternfly documented 4 miles from Lower Allen, first recorded 2018. What to watch for.
What's on the federal record near Lower Allen
Closest first, within ~10 miles of Lower Allen. Listing isn't leaking, and distance isn't exposure.
- AUTO BODY PROS INCBrownfields · 1300 ft
- HEMPT BROSUnderground Storage Tanks · 1400 ft
- BUNCHES RELAY TOWERUnderground Storage Tanks · 1600 ft
- GRACE EVAN LUTH CHUnderground Storage Tanks · 1800 ft
- RON MOYERS SVC CTRUnderground Storage Tanks · 1800 ft
- NETTLES AUTO SVCUnderground Storage Tanks · 1900 ft
- ROLLING GREEN CEMETERYUnderground Storage Tanks · 2100 ft
- HIGHLAND ELEM SCHUnderground Storage Tanks · 2500 ft
- CEDAR CLIFF HIGH SCHUnderground Storage Tanks · 2500 ft
- MALLARD RUN APTUnderground Storage Tanks · 0.6 mi
- CVS PHARMACY #1630Brownfields · 0.6 mi
- HARRY L BOWERS INCUnderground Storage Tanks · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lower Allen'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 Lower Allen.
Sources Checked
within ~10 miles of Lower Allen
Severity Distribution
within ~10 miles of Lower Allen
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.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Lower Allen
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 Lower Allen average
Your land is one point inside Lower Allen
Everything above resolves to Lower Allen as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Lower Allen Average
Lower Allen Average
- ●USDA Zones 7a, averaged across Lower Allen
- ●One soil character for all of Lower Allen
- ●Frost dates read at Lower Allen's scale: Mar 31 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Lower Allen's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lower Allen
Pull a site-specific report for your exact address in Lower Allen, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lower Allen averages can't show:
We read public map data around Lower Allen — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lower Allen average
How we know this about Lower Allen
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 Lower Allen’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 Lower Allen
When does frost risk typically end in Lower Allen?
The last hard freeze (28°F) in Lower Allen 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 Lower Allen?
The first hard freeze (28°F) in Lower Allen 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 223 days after the spring freeze cleared.
How long is the growing season in Lower Allen?
Measured between 28°F hard freezes, Lower Allen sees about 223 frost-free days — roughly Mar 31 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 26, about 188 days.
Is the soil safe to grow vegetables in Lower Allen?
The federal record around Lower Allen is a meaningful one — 1,765 documented sites, mostly Underground Storage Tanks entries (1,052), the nearest Brownfields record about 0.2 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 Lower Allen?
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 Lower Allen's scale — its 7a band and its 223-day season. Your yard writes its own version of Lower Allen'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 Lower Allen’s own scale
7 of the readings below were taken at Lower Allen's own scale — its own ~223-day season between 28°F freezes, the 1,406 acres it covers and 1,765 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lower Allen's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Lower Allen's own 28°F hard-freeze dates, about Mar 31 and Nov 9 and the ~223-day span between themNOAA 1991–2020 Climate Normals
- 1,765 documented contamination sites on the federal record near Lower Allen, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Lower Allen's boundary and the 1,406 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~223-day seasonGrowable Ground crop-matching engine
- The ecoregion at Lower Allen's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Lower Allenlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Lower Allen's 1,406 acres read through its county's SSURGO summaryfrom Cumberland County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cumberland 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 Cumberland County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lower Allen's 1,406 acreswhy one lot differs from the next →
- Which side of Lower Allen you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,406 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 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 Lower Allen-wide figureread your own land →