Hamorton, Pennsylvania, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include cabbage, hazelnut, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Hamorton, 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 Hamorton 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 Hamorton — soil, climate, flood, and parcel records. How we handle your address.
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Hamorton — the short answer
Hamorton, Pennsylvania: USDA zone 7a, about 216 days between hard freezes, across 71 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 3
- 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
- ~216
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 71 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 Hamorton's average, not your lot's — a low corner or a tree line moves it. Against Hamorton's 216-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hamorton
Each reading below is measured for Hamorton itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHamorton runs about 216 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
MeasuredHamorton 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 Hamorton is in
Hamorton sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hamorton's own centroid rather than borrowed from Chester County.
What Grows in Hamorton
Every plant below cleared Hamorton's own zone 7a and its 216-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in Hamorton?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 3 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Hamorton
Spotted lanternfly documented 3 miles from Hamorton, first recorded 2018. What to watch for.
What's on the federal record near Hamorton
Closest first, within ~10 miles of Hamorton. Listing isn't leaking, and distance isn't exposure.
- CH 3306Nitrate · 500 ft
- CH 455Nitrate · 550 ft
- KENDAL CROSSLANDS COMMUnderground Storage Tanks · 2300 ft
- SUNOCO SERVICE STATIONBrownfields · 0.6 mi
- CH 6655Nitrate · 0.7 mi
- CH 410Nitrate · 0.7 mi
- SUNOCO SVC STABrownfields · 0.7 mi
- WALTON SMEDLEY FARMUnderground Storage Tanks · 0.7 mi
- GREENWOOD ELEM SCHUnderground Storage Tanks · 0.9 mi
- CH 3487Nitrate · 0.9 mi
- CVS PHARMACY #1074Brownfields · 1.0 mi
- DR SCOTT & FORSTER FAMILY DENTSTRYBrownfields · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hamorton'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 Hamorton.
Sources Checked
within ~10 miles of Hamorton
Severity Distribution
within ~10 miles of Hamorton
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hamorton, Nitrate runs higher than the national average — 730 sites within ~10 miles of Hamorton. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Hamorton
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 Hamorton average
Your land is one point inside Hamorton
Everything above resolves to Hamorton as a whole — one PHZM band and one 28°F frost record, read across 71 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 Hamorton Average
Hamorton Average
- ●USDA Zones 7a, averaged across Hamorton
- ●One soil character for all of Hamorton
- ●Frost dates read at Hamorton's scale: Apr 3 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Hamorton's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hamorton
Pull a site-specific report for your exact address in Hamorton, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hamorton averages can't show:
We read public map data around Hamorton — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hamorton average
How we know this about Hamorton
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 Hamorton’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 Hamorton
When does frost risk typically end in Hamorton?
The last hard freeze (28°F) in Hamorton typically lands around Apr 3, 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 24.
When is the first frost in Hamorton?
The first hard freeze (28°F) in Hamorton 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 216 days after the spring freeze cleared.
How long is the growing season in Hamorton?
Measured between 28°F hard freezes, Hamorton sees about 216 frost-free days — roughly Apr 3 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 24 to Oct 22, about 181 days.
Is the soil safe to grow vegetables in Hamorton?
The federal record around Hamorton is a meaningful one — 2,148 documented sites, mostly Underground Storage Tanks entries (824), the nearest Nitrate 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 Hamorton?
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 Hamorton's scale — its 7a band and its 216-day season. Your yard writes its own version of Hamorton'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 Hamorton’s own scale
7 of the readings below were taken at Hamorton's own scale — its own ~216-day season between 28°F freezes, the 71 acres it covers and 2,148 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hamorton's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Hamorton's own 28°F hard-freeze dates, about Apr 3 and Nov 5 and the ~216-day span between themNOAA 1991–2020 Climate Normals
- 2,148 documented contamination sites on the federal record near Hamorton, the closest Nitrate record under a tenth of a mile out from the town centreFederal environmental registers
- Hamorton's boundary and the 71 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~216-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hamorton's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Hamortonlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hamorton's 71 acres read through its county's SSURGO summaryfrom Chester County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Chester 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 Chester County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hamorton's 71 acreswhy one lot differs from the next →
- Which side of Hamorton you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 71 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Hamorton-wide figureread your own land →