Frenchtown, New Jersey, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, hazelnut, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Frenchtown, 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 Frenchtown 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 Frenchtown — soil, climate, flood, and parcel records. How we handle your address.
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Frenchtown — the short answer
Frenchtown, New Jersey: USDA zone 7a, about 212 days between hard freezes, across 722 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~212
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 722 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 Frenchtown's average, not your lot's — a low corner or a tree line moves it. Against Frenchtown's 212-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Frenchtown
Each reading below is measured for Frenchtown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFrenchtown runs about 212 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
MeasuredFrenchtown 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 Frenchtown is in
Frenchtown sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Frenchtown's own centroid rather than borrowed from Hunterdon County.
What Grows in Frenchtown
Every plant below cleared Frenchtown's own zone 7a and its 212-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Frenchtown?
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 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 3 — 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 Frenchtown
Spotted lanternfly documented 1 miles from Frenchtown, first recorded 2018. What to watch for.
What's on the federal record near Frenchtown
Closest first, within ~10 miles of Frenchtown. Listing isn't leaking, and distance isn't exposure.
- 190005-- PW 1Nitrate · 2000 ft
- 190306-- Wash Dist 1Nitrate · 2100 ft
- FRENCHTOWN CITGOUnderground Storage Tanks · 2400 ft
- FRENCHTOWN MOBILUnderground Storage Tanks · 2500 ft
- ECHLIN TRUCKUnderground Storage Tanks · 0.5 mi
- UNITED TELEPHONE CO OF NJUnderground Storage Tanks · 0.5 mi
- FRENCHTOWN CERAMICS COUnderground Storage Tanks · 0.5 mi
- FRENCHTOWN CERAMICS COToxics Release Inventory · 0.6 mi
- 190305-- Frnchtwn 2Nitrate · 0.7 mi
- 190621-- MW118R-2Nitrate · 0.7 mi
- 190454-- MW118Nitrate · 0.7 mi
- DELAWARE VALLEY CONCRETE COUnderground Storage Tanks · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Frenchtown'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 Frenchtown.
Sources Checked
within ~10 miles of Frenchtown
Severity Distribution
within ~10 miles of Frenchtown
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Frenchtown, two things run higher than the national average within ~10 miles of Frenchtown — Superfund (10 sites) and Nitrate (154 sites). That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Frenchtown
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 Frenchtown average
Your land is one point inside Frenchtown
Everything above resolves to Frenchtown as a whole — one PHZM band and one 28°F frost record, read across 722 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 Frenchtown Average
Frenchtown Average
- ●USDA Zones 7a, averaged across Frenchtown
- ●One soil character for all of Frenchtown
- ●Frost dates read at Frenchtown's scale: Apr 5 to Nov 3
YOUR Parcel
- ✓Your exact zone, not Frenchtown's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Frenchtown
Pull a site-specific report for your exact address in Frenchtown, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Frenchtown averages can't show:
We read public map data around Frenchtown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Frenchtown average
How we know this about Frenchtown
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 Frenchtown’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 Frenchtown
When does frost risk typically end in Frenchtown?
The last hard freeze (28°F) in Frenchtown typically lands around Apr 5, 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 26.
When is the first frost in Frenchtown?
The first hard freeze (28°F) in Frenchtown typically arrives around Nov 3, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 20, so the watching starts about Oct 4 — about 212 days after the spring freeze cleared.
How long is the growing season in Frenchtown?
Measured between 28°F hard freezes, Frenchtown sees about 212 frost-free days — roughly Apr 5 through Nov 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 20, about 177 days.
Is the soil safe to grow vegetables in Frenchtown?
The federal record around Frenchtown runs heavier than most — 414 documented sites, mostly Underground Storage Tanks entries (192), 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 Frenchtown?
From about Oct 4 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 3 (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 3. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Frenchtown's scale — its 7a band and its 212-day season. Your yard writes its own version of Frenchtown'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 Frenchtown’s own scale
7 of the readings below were taken at Frenchtown's own scale — its own ~212-day season between 28°F freezes, the 722 acres it covers and 414 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Frenchtown's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Frenchtown's own 28°F hard-freeze dates, about Apr 5 and Nov 3 and the ~212-day span between themNOAA 1991–2020 Climate Normals
- 414 documented contamination sites on the federal record near Frenchtown, the closest Nitrate record about 0.4 miles out from the town centreFederal environmental registers
- Frenchtown's boundary and the 722 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~212-day seasonGrowable Ground crop-matching engine
- The ecoregion at Frenchtown's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Frenchtownlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Frenchtown's 722 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 Frenchtown's 722 acreswhy one lot differs from the next →
- Which side of Frenchtown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 722 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 Frenchtown-wide figureread your own land →
More in New Jersey
Wider growing context
What grows across New JerseyFrenchtown sits outside our named growing regions, so New Jersey as a whole is its closest context here.
Nearby growing guides