Hewlett Neck, New York, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, prickly pear, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Hewlett Neck, 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 Hewlett Neck 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 Hewlett Neck — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Hewlett Neck — the short answer
Hewlett Neck, New York: USDA zone 7b, about 256 days between hard freezes, across 125 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Dec 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~256
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 125 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 Hewlett Neck's average, not your lot's — a low corner or a tree line moves it. Against Hewlett Neck's 256-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hewlett Neck
Each reading below is measured for Hewlett Neck itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHewlett Neck runs about 256 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
MeasuredHewlett Neck 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 Hewlett Neck is in
Hewlett Neck sits in the Atlantic Coastal Pine Barrens — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hewlett Neck's own centroid, and it is not what its county reads: Nassau County is mostly Northeastern Coastal Zone. The wider page above you is answering a different question about different ground.
What Grows in Hewlett Neck
Every plant below cleared Hewlett Neck's own zone 7b and its 256-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Hewlett Neck?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 2 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Hewlett Neck
Spotted lanternfly documented 3 miles from Hewlett Neck, first recorded 2021. What to watch for.
What's on the federal record near Hewlett Neck
Closest first, within ~10 miles of Hewlett Neck. Listing isn't leaking, and distance isn't exposure.
- N 6707. 1Nitrate · 1700 ft
- N 6792. 1Nitrate · 1700 ft
- N 6706. 1Nitrate · 1700 ft
- N 1115. 2Nitrate · 0.6 mi
- N 1116. 2Nitrate · 0.6 mi
- N 7133. 1Nitrate · 0.7 mi
- CVS PHARMACY #2145Brownfields · 0.7 mi
- FRANK'S DRY CLEANERS INCBrownfields · 0.7 mi
- BP #36709Brownfields · 0.8 mi
- BPUnderground Storage Tanks · 0.8 mi
- LAWRENCE PUBLIC SCHOOL 6Brownfields · 0.9 mi
- N 3866. 1Nitrate · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hewlett Neck'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 Hewlett Neck.
Sources Checked
within ~10 miles of Hewlett Neck
Severity Distribution
within ~10 miles of Hewlett Neck
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hewlett Neck, Nitrate runs higher than the national average — 1,642 sites within ~10 miles of Hewlett Neck. 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 Hewlett Neck
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 Hewlett Neck average
Your land is one point inside Hewlett Neck
Everything above resolves to Hewlett Neck as a whole — one PHZM band and one 28°F frost record, read across 125 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 Hewlett Neck Average
Hewlett Neck Average
- ●USDA Zones 7b, averaged across Hewlett Neck
- ●One soil character for all of Hewlett Neck
- ●Frost dates read at Hewlett Neck's scale: Mar 21 to Dec 2
YOUR Parcel
- ✓Your exact zone, not Hewlett Neck's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hewlett Neck
Pull a site-specific report for your exact address in Hewlett Neck, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hewlett Neck averages can't show:
We read public map data around Hewlett Neck — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hewlett Neck average
How we know this about Hewlett Neck
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 Hewlett Neck’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 Hewlett Neck
When does frost risk typically end in Hewlett Neck?
The last hard freeze (28°F) in Hewlett Neck typically lands around Mar 21, 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 11.
When is the first frost in Hewlett Neck?
The first hard freeze (28°F) in Hewlett Neck typically arrives around Dec 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 18, so the watching starts about Nov 2 — about 256 days after the spring freeze cleared.
How long is the growing season in Hewlett Neck?
Measured between 28°F hard freezes, Hewlett Neck sees about 256 frost-free days — roughly Mar 21 through Dec 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 11 to Nov 18, about 221 days.
Is the soil safe to grow vegetables in Hewlett Neck?
The federal record around Hewlett Neck runs heavier than most — 5,129 documented sites, mostly Underground Storage Tanks entries (1,788), the nearest Nitrate record about 0.3 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 Hewlett Neck?
From about Nov 2 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 Dec 2 (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 Dec 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hewlett Neck's scale — its 7b band and its 256-day season. Your yard writes its own version of Hewlett Neck'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 Hewlett Neck’s own scale
7 of the readings below were taken at Hewlett Neck's own scale — its own ~256-day season between 28°F freezes, the 125 acres it covers and 5,129 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hewlett Neck's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Hewlett Neck's own 28°F hard-freeze dates, about Mar 21 and Dec 2 and the ~256-day span between themNOAA 1991–2020 Climate Normals
- 5,129 documented contamination sites on the federal record near Hewlett Neck, the closest Nitrate record about 0.3 miles out from the town centreFederal environmental registers
- Hewlett Neck's boundary and the 125 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~256-day seasonGrowable Ground crop-matching engine
- Hewlett Neck sits in the Atlantic Coastal Pine Barrens — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Hewlett Necklydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hewlett Neck's 125 acres read through its county's SSURGO summaryfrom Nassau County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Nassau 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 Nassau County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hewlett Neck's 125 acreswhy one lot differs from the next →
- Which side of Hewlett Neck you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 125 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.3 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 Hewlett Neck-wide figureread your own land →