Belle Terre, New York, sits in USDA hardiness zone 7b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Expect cabbage, prickly pear, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Belle Terre, 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 Belle Terre 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 Belle Terre — soil, climate, flood, and parcel records. How we handle your address.
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Belle Terre — the short answer
Belle Terre, New York: USDA zone 7b, about 240 days between hard freezes, across 566 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~240
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 566 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 7b is Belle Terre's average, not your lot's — a low corner or a tree line moves it. Against Belle Terre's 240-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Belle Terre
Each reading below is measured for Belle Terre itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBelle Terre runs about 240 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
MeasuredBelle Terre sits in USDA hardiness zone 7b.
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 Belle Terre is in
Belle Terre sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Belle Terre's own centroid, and it is not what its county reads: Suffolk County is mostly Atlantic Coastal Pine Barrens. The wider page above you is answering a different question about different ground.
What Grows in Belle Terre
Every plant below cleared Belle Terre's own zone 7b and its 240-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Belle Terre?
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 Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 22 — 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 Belle Terre
Spotted lanternfly documented 2 miles from Belle Terre, first recorded 2023. What to watch for.
What's on the federal record near Belle Terre
Closest first, within ~10 miles of Belle Terre. Listing isn't leaking, and distance isn't exposure.
- Public Beach and Dog Park at Port Jefferson, NYNitrate · 0.7 mi
- CHILDRENS MARITIME MUSEUM-INC VILLAGE OF PORT JEFFERSONBrownfields · 0.9 mi
- PORT JEFFERSON VILLAGE CENTERBrownfields · 0.9 mi
- TILCON NEW YORK INC.Underground Storage Tanks · 0.9 mi
- NATIONAL GRID - PORT JEFFERSON POWER STATIONToxics Release Inventory · 1.0 mi
- NATIONAL GRID - PORT JEFFERSON POWER STATIONBrownfields · 1.0 mi
- ST CHARLES HOSPITALBrownfields · 1.0 mi
- NATIONAL GRID - PORT JEFFERSON ENERGY CENTERBrownfields · 1.0 mi
- S 8439. 1Nitrate · 1.0 mi
- S 4372. 1Nitrate · 1.0 mi
- Walnut Beach at Port Jefferson Harbor, Poquott, NYNitrate · 1.0 mi
- LONG ISLAND BONE & JOINT LLPBrownfields · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Belle Terre'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 Belle Terre.
Sources Checked
within ~10 miles of Belle Terre
Severity Distribution
within ~10 miles of Belle Terre
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Belle Terre, Nitrate runs higher than the national average — 394 sites within ~10 miles of Belle Terre. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Belle Terre
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 Belle Terre average
Your land is one point inside Belle Terre
Everything above resolves to Belle Terre as a whole — one PHZM band and one 28°F frost record, read across 566 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 Belle Terre Average
Belle Terre Average
- ●USDA Zones 7b, averaged across Belle Terre
- ●One soil character for all of Belle Terre
- ●Frost dates read at Belle Terre's scale: Mar 27 to Nov 22
YOUR Parcel
- ✓Your exact zone, not Belle Terre's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Belle Terre
Pull a site-specific report for your exact address in Belle Terre, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Belle Terre averages can't show:
We read public map data around Belle Terre — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Belle Terre average
How we know this about Belle Terre
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 Belle Terre’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 Belle Terre
When does frost risk typically end in Belle Terre?
The last hard freeze (28°F) in Belle Terre typically lands around Mar 27, 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 17.
When is the first frost in Belle Terre?
The first hard freeze (28°F) in Belle Terre typically arrives around Nov 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 8, so the watching starts about Oct 23 — about 240 days after the spring freeze cleared.
How long is the growing season in Belle Terre?
Measured between 28°F hard freezes, Belle Terre sees about 240 frost-free days — roughly Mar 27 through Nov 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Nov 8, about 205 days.
Is the soil safe to grow vegetables in Belle Terre?
The federal record around Belle Terre is a meaningful one — 837 documented sites, mostly Nitrate entries (394), the nearest Nitrate record about 0.7 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 Belle Terre?
From about Oct 23 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Belle Terre's scale — its 7b band and its 240-day season. Your yard writes its own version of Belle Terre'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 Belle Terre’s own scale
7 of the readings below were taken at Belle Terre's own scale — its own ~240-day season between 28°F freezes, the 566 acres it covers and 837 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Belle Terre's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Belle Terre's own 28°F hard-freeze dates, about Mar 27 and Nov 22 and the ~240-day span between themNOAA 1991–2020 Climate Normals
- 837 documented contamination sites on the federal record near Belle Terre, the closest Nitrate record about 0.7 miles out from the town centreFederal environmental registers
- Belle Terre's boundary and the 566 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~240-day seasonGrowable Ground crop-matching engine
- Belle Terre sits in the Northeastern Coastal Zone — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Belle Terrelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Belle Terre's 566 acres read through its county's SSURGO summaryfrom Suffolk County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Suffolk County
- The growing challenges every New York grower plans around — written at state scale, so they stay on the state guidefrom New York
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Suffolk County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Belle Terre's 566 acreswhy one lot differs from the next →
- Which side of Belle Terre you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 566 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.7 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 Belle Terre-wide figureread your own land →