Lambertville, New Jersey, 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 Lambertville, 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 Lambertville 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 Lambertville — soil, climate, flood, and parcel records. How we handle your address.
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Lambertville — the short answer
Lambertville, New Jersey: USDA zone 7a, about 220 days between hard freezes, across 694 acres of city.
- 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 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 694 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 Lambertville's average, not your lot's — a low corner or a tree line moves it. Against Lambertville's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lambertville
Each reading below is measured for Lambertville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLambertville runs about 220 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
MeasuredLambertville 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 Lambertville is in
Lambertville sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Lambertville's own centroid rather than borrowed from Hunterdon County.
What Grows in Lambertville
Every plant below cleared Lambertville's own zone 7a and its 220-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Lambertville?
For most of the year, no — what changes is which crops still fit the days remaining. 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 8 — 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 Lambertville
Spotted lanternfly documented 1 miles from Lambertville, first recorded 2018. What to watch for.
What's on the federal record near Lambertville
Closest first, within ~10 miles of Lambertville. Listing isn't leaking, and distance isn't exposure.
- FERRELLGASUnderground Storage Tanks · 400 ft
- STANLEY CLEANERS INCBrownfields · 550 ft
- LAMBERTVILLE CITY HALL & GARAGEUnderground Storage Tanks · 700 ft
- TAURUS CORPORATIONSuperfund · 850 ft
- HEATHS SERVICE INCUnderground Storage Tanks · 900 ft
- SUNOCO 0010-1519Underground Storage Tanks · 900 ft
- VACANT LOT RINGHAMP& PITTOREUnderground Storage Tanks · 1100 ft
- SWNJ LAMBERTVILLE WATER TANKBrownfields · 1400 ft
- NJ BELL TELEPHONEUnderground Storage Tanks · 1400 ft
- LAMBERTVILLE HOUSEHOLD HAZARDOUS WASTE COLLECTION SITEBrownfields · 1500 ft
- GASCOBrownfields · 1700 ft
- MARRIOTT SAMUEL CUnderground Storage Tanks · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Lambertville'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 Lambertville.
Total Sites
814
within ~10 miles of Lambertville
Risk Level
Elevated
Highest-severity
7 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Lambertville
Severity Distribution
within ~10 miles of Lambertville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lambertville, Nitrate runs higher than the national average — 342 sites within ~10 miles of Lambertville. That's not a problem with your land — it's information about 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 Lambertville
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 Lambertville average
Your land is one point inside Lambertville
Everything above resolves to Lambertville as a whole — one PHZM band and one 28°F frost record, read across 694 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 city 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 Lambertville Average
Lambertville Average
- ●USDA Zones 7a, averaged across Lambertville
- ●One soil character for all of Lambertville
- ●Frost dates read at Lambertville's scale: Apr 2 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Lambertville's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lambertville
Pull a site-specific report for your exact address in Lambertville, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lambertville averages can't show:
We read public map data around Lambertville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lambertville average
How we know this about Lambertville
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Lambertville’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 city grain anywhere on this page — there is no city-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 Lambertville
When does frost risk typically end in Lambertville?
The last hard freeze (28°F) in Lambertville 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 Lambertville?
The first hard freeze (28°F) in Lambertville typically arrives around Nov 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 25, so the watching starts about Oct 9 — about 220 days after the spring freeze cleared.
How long is the growing season in Lambertville?
Measured between 28°F hard freezes, Lambertville sees about 220 frost-free days — roughly Apr 2 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 25, about 185 days.
Is the soil safe to grow vegetables in Lambertville?
The federal record around Lambertville is a meaningful one — 814 documented sites, mostly Nitrate entries (342), 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 Lambertville?
From about Oct 9 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lambertville's scale — its 7a band and its 220-day season. Your yard writes its own version of Lambertville'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 Lambertville’s own scale
7 of the readings below were taken at Lambertville's own scale — its own ~220-day season between 28°F freezes, the 694 acres it covers and 814 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lambertville's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Lambertville's own 28°F hard-freeze dates, about Apr 2 and Nov 8 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 814 documented contamination sites on the federal record near Lambertville, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Lambertville's boundary and the 694 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~220-day seasonGrowable Ground crop-matching engine
- The ecoregion at Lambertville's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Lambertvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Lambertville's 694 acres read through its county's SSURGO summaryfrom Hunterdon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hunterdon County
- The growing challenges every New Jersey grower plans around — written at state scale, so they stay on the state guidefrom New Jersey
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Hunterdon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lambertville's 694 acreswhy one lot differs from the next →
- Which side of Lambertville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 694 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 Lambertville-wide figureread your own land →
More in New Jersey
Wider growing context
What grows across New JerseyLambertville sits outside our named growing regions, so New Jersey as a whole is its closest context here.
Nearby growing guides