Jonestown, Pennsylvania, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with cabbage, hazelnut, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Jonestown, 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 Jonestown 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 Jonestown — soil, climate, flood, and parcel records. How we handle your address.
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Jonestown — the short answer
Jonestown, Pennsylvania: USDA zone 7a, about 218 days between hard freezes, across 406 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~218
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 406 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 Jonestown's average, not your lot's — a low corner or a tree line moves it. Against Jonestown's 218-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jonestown
Each reading below is measured for Jonestown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredJonestown runs about 218 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
MeasuredJonestown 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 Jonestown is in
Jonestown sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Jonestown's own centroid rather than borrowed from Lebanon County.
What Grows in Jonestown
Every plant below cleared Jonestown's own zone 7a and its 218-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Jonestown?
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 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 6 — 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 Jonestown
Spotted lanternfly documented 3 miles from Jonestown, first recorded 2017. What to watch for.
What's on the federal record near Jonestown
Closest first, within ~10 miles of Jonestown. Listing isn't leaking, and distance isn't exposure.
- VERIZON JONESTOWN 4040007 AUnderground Storage Tanks · 400 ft
- PA FISH COMM JONESTOWN MAINT HQUnderground Storage Tanks · 550 ft
- JONESTOWN INDUnderground Storage Tanks · 850 ft
- CALVIN HETRICKUnderground Storage Tanks · 2100 ft
- SWATARA INTAKEUnderground Storage Tanks · 2100 ft
- MONROE VALLEY GCUnderground Storage Tanks · 2100 ft
- JONO HDWRUnderground Storage Tanks · 2100 ft
- EUGENE BOESHOREUnderground Storage Tanks · 2100 ft
- SWATARA TWP LEBANON CNTYUnderground Storage Tanks · 2500 ft
- SUPREME MID ATLANTIC/PLANT 1 - UNION TWPBrownfields · 2600 ft
- SUPREME MID ATLANTIC/PLANT 1 - UNION TWPToxics Release Inventory · 2600 ft
- SUPREME MID ATLANTICUnderground Storage Tanks · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Jonestown'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 Jonestown.
Sources Checked
within ~10 miles of Jonestown
Severity Distribution
within ~10 miles of Jonestown
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jonestown, two things run higher than the national average within ~10 miles of Jonestown — CAFO (51 sites) and Nitrate (304 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.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Jonestown
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 Jonestown average
Your land is one point inside Jonestown
Everything above resolves to Jonestown as a whole — one PHZM band and one 28°F frost record, read across 406 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 Jonestown Average
Jonestown Average
- ●USDA Zones 7a, averaged across Jonestown
- ●One soil character for all of Jonestown
- ●Frost dates read at Jonestown's scale: Apr 2 to Nov 6
YOUR Parcel
- ✓Your exact zone, not Jonestown's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jonestown
Pull a site-specific report for your exact address in Jonestown, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jonestown averages can't show:
We read public map data around Jonestown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jonestown average
How we know this about Jonestown
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 Jonestown’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 Jonestown
When does frost risk typically end in Jonestown?
The last hard freeze (28°F) in Jonestown typically lands around Apr 2, 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 23.
When is the first frost in Jonestown?
The first hard freeze (28°F) in Jonestown typically arrives around Nov 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 23, so the watching starts about Oct 7 — about 218 days after the spring freeze cleared.
How long is the growing season in Jonestown?
Measured between 28°F hard freezes, Jonestown sees about 218 frost-free days — roughly Apr 2 through Nov 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 23, about 183 days.
Is the soil safe to grow vegetables in Jonestown?
The federal record around Jonestown is a meaningful one — 987 documented sites, mostly Underground Storage Tanks entries (417), 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 Jonestown?
From about Oct 7 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 6 (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 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Jonestown's scale — its 7a band and its 218-day season. Your yard writes its own version of Jonestown'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 Jonestown’s own scale
7 of the readings below were taken at Jonestown's own scale — its own ~218-day season between 28°F freezes, the 406 acres it covers and 987 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Jonestown's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Jonestown's own 28°F hard-freeze dates, about Apr 2 and Nov 6 and the ~218-day span between themNOAA 1991–2020 Climate Normals
- 987 documented contamination sites on the federal record near Jonestown, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Jonestown's boundary and the 406 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~218-day seasonGrowable Ground crop-matching engine
- The ecoregion at Jonestown's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Jonestownlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Jonestown's 406 acres read through its county's SSURGO summaryfrom Lebanon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lebanon 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 Lebanon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Jonestown's 406 acreswhy one lot differs from the next →
- Which side of Jonestown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 406 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 Jonestown-wide figureread your own land →
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