New Tripoli, Pennsylvania, sits in USDA hardiness zone 6b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, hazelnut, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in New Tripoli, 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 New Tripoli 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 New Tripoli — soil, climate, flood, and parcel records. How we handle your address.
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New Tripoli — the short answer
New Tripoli, Pennsylvania: USDA zone 6b, about 200 days between hard freezes, across 587 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~200
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 587 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 6b is New Tripoli's average, not your lot's — a low corner or a tree line moves it. Against New Tripoli's 200-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Tripoli
Each reading below is measured for New Tripoli itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Tripoli runs about 200 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
MeasuredNew Tripoli sits in USDA hardiness zone 6b.
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 New Tripoli is in
New Tripoli sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Tripoli's own centroid rather than borrowed from Lehigh County.
What Grows in New Tripoli
Every plant below cleared New Tripoli's own zone 6b and its 200-day season. Each card opens that plant's Pennsylvania profile. How we score.
Is it too late to plant in New Tripoli?
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 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 27 — 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 New Tripoli
Spotted lanternfly documented 3 miles from New Tripoli, first recorded 2017. What to watch for.
What's on the federal record near New Tripoli
Closest first, within ~10 miles of New Tripoli. Listing isn't leaking, and distance isn't exposure.
- LE 824Nitrate · 2400 ft
- KERN PROPUnderground Storage Tanks · 0.7 mi
- IRA E FEINOURUnderground Storage Tanks · 0.9 mi
- LE 816Nitrate · 0.9 mi
- LE 1428Nitrate · 1.1 mi
- NORTHWESTERN LEHIGH SCH DISTUnderground Storage Tanks · 1.3 mi
- NORTHWESTERN LEHIGH SCH DIST BUS GARAGEUnderground Storage Tanks · 1.5 mi
- NEW TRIPOLI PLAZAUnderground Storage Tanks · 1.5 mi
- CONNIE & FRANK METZGERUnderground Storage Tanks · 1.5 mi
- NORTHWESTERN LEHIGH MIDDLE SCHOOLBrownfields · 1.5 mi
- LE 1239Nitrate · 1.6 mi
- LE 1240Nitrate · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Tripoli'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 New Tripoli.
Sources Checked
within ~10 miles of New Tripoli
Severity Distribution
within ~10 miles of New Tripoli
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Tripoli, two things run higher than the national average within ~10 miles of New Tripoli — CAFO (8 sites) and Nitrate (134 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 New Tripoli
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 New Tripoli average
Your land is one point inside New Tripoli
Everything above resolves to New Tripoli as a whole — one PHZM band and one 28°F frost record, read across 587 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 New Tripoli Average
New Tripoli Average
- ●USDA Zones 6b, averaged across New Tripoli
- ●One soil character for all of New Tripoli
- ●Frost dates read at New Tripoli's scale: Apr 10 to Oct 27
YOUR Parcel
- ✓Your exact zone, not New Tripoli's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Tripoli
Pull a site-specific report for your exact address in New Tripoli, Pennsylvania — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Tripoli averages can't show:
We read public map data around New Tripoli — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Tripoli average
How we know this about New Tripoli
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 New Tripoli’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 New Tripoli
When does frost risk typically end in New Tripoli?
The last hard freeze (28°F) in New Tripoli typically lands around Apr 10, 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 May 1.
When is the first frost in New Tripoli?
The first hard freeze (28°F) in New Tripoli typically arrives around Oct 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 13, so the watching starts about Sep 27 — about 200 days after the spring freeze cleared.
How long is the growing season in New Tripoli?
Measured between 28°F hard freezes, New Tripoli sees about 200 frost-free days — roughly Apr 10 through Oct 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 13, about 165 days.
Is the soil safe to grow vegetables in New Tripoli?
The federal record around New Tripoli runs heavier than most — 485 documented sites, mostly Underground Storage Tanks entries (186), the nearest Nitrate record about 0.4 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 New Tripoli?
From about Sep 27 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 Oct 27 (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 Oct 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Tripoli's scale — its 6b band and its 200-day season. Your yard writes its own version of New Tripoli'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 New Tripoli’s own scale
7 of the readings below were taken at New Tripoli's own scale — its own ~200-day season between 28°F freezes, the 587 acres it covers and 485 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Tripoli's own USDA hardiness band, zones 6bUSDA PHZM 2023
- New Tripoli's own 28°F hard-freeze dates, about Apr 10 and Oct 27 and the ~200-day span between themNOAA 1991–2020 Climate Normals
- 485 documented contamination sites on the federal record near New Tripoli, the closest Nitrate record about 0.4 miles out from the town centreFederal environmental registers
- New Tripoli's boundary and the 587 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~200-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Tripoli's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of New Tripolilydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so New Tripoli's 587 acres read through its county's SSURGO summaryfrom Lehigh County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lehigh 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 Lehigh County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Tripoli's 587 acreswhy one lot differs from the next →
- Which side of New Tripoli you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 587 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.4 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 New Tripoli-wide figureread your own land →