Mount Hermon, New Jersey, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Crops well matched to these conditions include cabbage, hazelnut, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Mount Hermon, 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 Mount Hermon 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 Mount Hermon — soil, climate, flood, and parcel records. How we handle your address.
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Mount Hermon — the short answer
Mount Hermon, New Jersey: USDA zone 6b, about 200 days between hard freezes, across 597 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
- 597 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 Mount Hermon's average, not your lot's — a low corner or a tree line moves it. Against Mount Hermon's 200-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mount Hermon
Each reading below is measured for Mount Hermon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMount Hermon 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
MeasuredMount Hermon 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 Mount Hermon is in
Mount Hermon sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Mount Hermon's own centroid rather than borrowed from Warren County.
What Grows in Mount Hermon
Every plant below cleared Mount Hermon's own zone 6b and its 200-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Mount Hermon?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. 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. 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 Mount Hermon
Spotted lanternfly documented 3 miles from Mount Hermon, first recorded 2019. What to watch for.
What's on the federal record near Mount Hermon
Closest first, within ~10 miles of Mount Hermon. Listing isn't leaking, and distance isn't exposure.
- 410244-- DomesticNitrate · 0.8 mi
- US GASUnderground Storage Tanks · 1.4 mi
- WARREN CNTY GARAGE HOPEUnderground Storage Tanks · 1.5 mi
- NJDOT STRUCTURES #2115168 & #169Brownfields · 1.6 mi
- AT&T HOPE NJUnderground Storage Tanks · 1.7 mi
- JENNY JUMP STATE FORESTUnderground Storage Tanks · 1.7 mi
- NEW JERSEY STATE POLICEUnderground Storage Tanks · 1.8 mi
- LIGUORI'S SERVICE INCUnderground Storage Tanks · 1.8 mi
- LIGUORI'S SUNOCOUnderground Storage Tanks · 1.8 mi
- WARREN CNTY HOPE GARAGEUnderground Storage Tanks · 1.9 mi
- HOPE TOWNSHIP MUNICIPAL BUILDINGUnderground Storage Tanks · 2.0 mi
- 410312-- DomNitrate · 2.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mount Hermon'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 Mount Hermon.
Total Sites
426
within ~10 miles of Mount Hermon
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Mount Hermon
Severity Distribution
within ~10 miles of Mount Hermon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mount Hermon, two things run higher than the national average within ~10 miles of Mount Hermon — PFAS (4 sites) and Nitrate (118 sites). That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Mount Hermon
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 Mount Hermon average
Your land is one point inside Mount Hermon
Everything above resolves to Mount Hermon as a whole — one PHZM band and one 28°F frost record, read across 597 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 Mount Hermon Average
Mount Hermon Average
- ●USDA Zones 6b, averaged across Mount Hermon
- ●One soil character for all of Mount Hermon
- ●Frost dates read at Mount Hermon's scale: Apr 10 to Oct 27
YOUR Parcel
- ✓Your exact zone, not Mount Hermon's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mount Hermon
Pull a site-specific report for your exact address in Mount Hermon, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mount Hermon averages can't show:
We read public map data around Mount Hermon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mount Hermon average
How we know this about Mount Hermon
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 Mount Hermon’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 Mount Hermon
When does frost risk typically end in Mount Hermon?
The last hard freeze (28°F) in Mount Hermon 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 Mount Hermon?
The first hard freeze (28°F) in Mount Hermon 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 Mount Hermon?
Measured between 28°F hard freezes, Mount Hermon 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 Mount Hermon?
The federal record around Mount Hermon is a meaningful one — 426 documented sites, mostly Underground Storage Tanks entries (231), the nearest Nitrate record about 0.8 miles 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 Mount Hermon?
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 Mount Hermon's scale — its 6b band and its 200-day season. Your yard writes its own version of Mount Hermon'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 Mount Hermon’s own scale
7 of the readings below were taken at Mount Hermon's own scale — its own ~200-day season between 28°F freezes, the 597 acres it covers and 426 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mount Hermon's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Mount Hermon's own 28°F hard-freeze dates, about Apr 10 and Oct 27 and the ~200-day span between themNOAA 1991–2020 Climate Normals
- 426 documented contamination sites on the federal record near Mount Hermon, the closest Nitrate record about 0.8 miles out from the town centreFederal environmental registers
- Mount Hermon's boundary and the 597 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 Mount Hermon's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Mount Hermonlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mount Hermon's 597 acres read through its county's SSURGO summaryfrom Warren County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Warren 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 Warren County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mount Hermon's 597 acreswhy one lot differs from the next →
- Which side of Mount Hermon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 597 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.8 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 Mount Hermon-wide figureread your own land →