Glendon, Pennsylvania, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
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 Glendon, 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 Glendon 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 Glendon — soil, climate, flood, and parcel records. How we handle your address.
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Glendon — the short answer
Glendon, Pennsylvania: USDA zone 7a, about 214 days between hard freezes, across 394 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~214
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 394 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 Glendon's average, not your lot's — a low corner or a tree line moves it. Against Glendon's 214-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glendon
Each reading below is measured for Glendon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlendon runs about 214 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
MeasuredGlendon 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 Glendon is in
Glendon sits in the Northeastern Highlands — EPA Level III, inside the wider Northern Forests. That is read at Glendon's own centroid, and it is not what its county reads: Northampton County is mostly Ridge and Valley. The wider page above you is answering a different question about different ground.
What Grows in Glendon
Every plant below cleared Glendon's own zone 7a and its 214-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Glendon?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 5 — 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 Glendon
Spotted lanternfly documented 3 miles from Glendon, first recorded 2016. What to watch for.
What's on the federal record near Glendon
Closest first, within ~10 miles of Glendon. Listing isn't leaking, and distance isn't exposure.
- AIR PROD & CHEM EASTONUnderground Storage Tanks · 1000 ft
- AIR PRODUCTS ECDBrownfields · 1300 ft
- AIR PRODUCTS ECDToxics Release Inventory · 1300 ft
- STAR PONTIACUnderground Storage Tanks · 0.6 mi
- CHILDRENS HOME OF EASTONUnderground Storage Tanks · 0.7 mi
- WILLIAMS TWP NORTHAMPTON CNTYUnderground Storage Tanks · 0.7 mi
- CIPCO RECYCLING LLCBrownfields · 0.7 mi
- RECYCLE OIL COBrownfields · 0.7 mi
- INDUSTRIAL LANESuperfund · 0.8 mi
- TRIUMVIRATE WEST EASTON FACILITYBrownfields · 0.9 mi
- FRANK CASILIO & SONS INCUnderground Storage Tanks · 0.9 mi
- PHILIP LAUER MID SCHUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Glendon'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 Glendon.
Sources Checked
within ~10 miles of Glendon
Severity Distribution
within ~10 miles of Glendon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Glendon, Toxics Release Inventory runs higher than the national average — 94 sites within ~10 miles of Glendon. That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Glendon
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 Glendon average
Your land is one point inside Glendon
Everything above resolves to Glendon as a whole — one PHZM band and one 28°F frost record, read across 394 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 Glendon Average
Glendon Average
- ●USDA Zones 7a, averaged across Glendon
- ●One soil character for all of Glendon
- ●Frost dates read at Glendon's scale: Apr 5 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Glendon's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glendon
Pull a site-specific report for your exact address in Glendon, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glendon averages can't show:
We read public map data around Glendon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glendon average
How we know this about Glendon
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 Glendon’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 Glendon
When does frost risk typically end in Glendon?
The last hard freeze (28°F) in Glendon typically lands around Apr 5, 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 26.
When is the first frost in Glendon?
The first hard freeze (28°F) in Glendon typically arrives around Nov 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 22, so the watching starts about Oct 6 — about 214 days after the spring freeze cleared.
How long is the growing season in Glendon?
Measured between 28°F hard freezes, Glendon sees about 214 frost-free days — roughly Apr 5 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 22, about 179 days.
Is the soil safe to grow vegetables in Glendon?
The federal record around Glendon runs heavier than most — 1,426 documented sites, mostly Underground Storage Tanks entries (778), the nearest Underground Storage Tanks record about 0.2 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.
How do I protect my plants from frost in Glendon?
From about Oct 6 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 5 (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 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Glendon's scale — its 7a band and its 214-day season. Your yard writes its own version of Glendon'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 Glendon’s own scale
7 of the readings below were taken at Glendon's own scale — its own ~214-day season between 28°F freezes, the 394 acres it covers and 1,426 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glendon's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Glendon's own 28°F hard-freeze dates, about Apr 5 and Nov 5 and the ~214-day span between themNOAA 1991–2020 Climate Normals
- 1,426 documented contamination sites on the federal record near Glendon, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Glendon's boundary and the 394 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~214-day seasonGrowable Ground crop-matching engine
- Glendon sits in the Northeastern Highlands — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Glendonlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Glendon's 394 acres read through its county's SSURGO summaryfrom Northampton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Northampton 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 Northampton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glendon's 394 acreswhy one lot differs from the next →
- Which side of Glendon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 394 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Glendon-wide figureread your own land →