Greencastle, 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 Greencastle, 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 Greencastle 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 Greencastle — soil, climate, flood, and parcel records. How we handle your address.
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Greencastle — the short answer
Greencastle, Pennsylvania: USDA zone 7a, about 224 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 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~224
- 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 Greencastle's average, not your lot's — a low corner or a tree line moves it. Against Greencastle's 224-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Greencastle
Each reading below is measured for Greencastle itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGreencastle runs about 224 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
MeasuredGreencastle 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 Greencastle is in
Greencastle sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Greencastle's own centroid rather than borrowed from Franklin County.
What Grows in Greencastle
Every plant below cleared Greencastle's own zone 7a and its 224-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Greencastle?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 10 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Greencastle
Spotted lanternfly documented 3 miles from Greencastle, first recorded 2019. What to watch for.
What's on the federal record near Greencastle
Closest first, within ~10 miles of Greencastle. Listing isn't leaking, and distance isn't exposure.
- SPRINGERS GARAGEUnderground Storage Tanks · 250 ft
- PARKING LOT ANTRIM HOUSEUnderground Storage Tanks · 700 ft
- JAMES J SMITH & SONS PAINTING INCUnderground Storage Tanks · 700 ft
- GREENCASTLE BORO GARAGEUnderground Storage Tanks · 950 ft
- BIO OXIDATIONBrownfields · 1000 ft
- SHEETZ 116Underground Storage Tanks · 1100 ft
- SHEETZ, INC (STORE # 116)Brownfields · 1100 ft
- BAER PKGUnderground Storage Tanks · 1400 ft
- CVS PHARMACY #0142Brownfields · 1400 ft
- FAMILY DOLLAR STORE NO 1030Brownfields · 1600 ft
- BOCK OILUnderground Storage Tanks · 1700 ft
- AC & TUnderground Storage Tanks · 2000 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Greencastle'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 Greencastle.
Sources Checked
within ~10 miles of Greencastle
Severity Distribution
within ~10 miles of Greencastle
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Greencastle, CAFO runs higher than the national average — 12 sites within ~10 miles of Greencastle. 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.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in Greencastle
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 Greencastle average
Your land is one point inside Greencastle
Everything above resolves to Greencastle 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 Greencastle Average
Greencastle Average
- ●USDA Zones 7a, averaged across Greencastle
- ●One soil character for all of Greencastle
- ●Frost dates read at Greencastle's scale: Mar 31 to Nov 10
YOUR Parcel
- ✓Your exact zone, not Greencastle's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Greencastle
Pull a site-specific report for your exact address in Greencastle, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Greencastle averages can't show:
We read public map data around Greencastle — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Greencastle average
How we know this about Greencastle
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 Greencastle’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 Greencastle
When does frost risk typically end in Greencastle?
The last hard freeze (28°F) in Greencastle 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 Greencastle?
The first hard freeze (28°F) in Greencastle typically arrives around Nov 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 27, so the watching starts about Oct 11 — about 224 days after the spring freeze cleared.
How long is the growing season in Greencastle?
Measured between 28°F hard freezes, Greencastle sees about 224 frost-free days — roughly Mar 31 through Nov 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 27, about 189 days.
Is the soil safe to grow vegetables in Greencastle?
The federal record around Greencastle is a meaningful one — 628 documented sites, mostly Underground Storage Tanks entries (317), 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 Greencastle?
From about Oct 11 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Greencastle's scale — its 7a band and its 224-day season. Your yard writes its own version of Greencastle'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 Greencastle’s own scale
7 of the readings below were taken at Greencastle's own scale — its own ~224-day season between 28°F freezes, the 1,016 acres it covers and 628 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Greencastle's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Greencastle's own 28°F hard-freeze dates, about Mar 31 and Nov 10 and the ~224-day span between themNOAA 1991–2020 Climate Normals
- 628 documented contamination sites on the federal record near Greencastle, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Greencastle's boundary and the 1,016 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~224-day seasonGrowable Ground crop-matching engine
- The ecoregion at Greencastle's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Greencastlelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Greencastle's 1,016 acres read through its county's SSURGO summaryfrom Franklin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Franklin 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 Franklin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Greencastle's 1,016 acreswhy one lot differs from the next →
- Which side of Greencastle you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,016 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 Greencastle-wide figureread your own land →