Hewlett Bay Park, New York, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with cabbage, prickly pear, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Hewlett Bay Park, 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 Bay Park 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 Bay Park — soil, climate, flood, and parcel records. How we handle your address.
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Hewlett Bay Park — the short answer
Hewlett Bay Park, New York: USDA zone 7b, about 256 days between hard freezes, across 216 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
- 216 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 Bay Park's average, not your lot's — a low corner or a tree line moves it. Against Hewlett Bay Park'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 Bay Park
Each reading below is measured for Hewlett Bay Park itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHewlett Bay Park 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 Bay Park 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 Bay Park is in
Hewlett Bay Park sits in the Atlantic Coastal Pine Barrens — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hewlett Bay Park'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 Bay Park
Every plant below cleared Hewlett Bay Park'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 Bay Park?
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 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. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Hewlett Bay Park
Spotted lanternfly documented 3 miles from Hewlett Bay Park, first recorded 2021. What to watch for.
What's on the federal record near Hewlett Bay Park
Closest first, within ~10 miles of Hewlett Bay Park. Listing isn't leaking, and distance isn't exposure.
- N 3866. 1Nitrate · 1000 ft
- N 3866. 2Nitrate · 1100 ft
- N 5589. 1Nitrate · 1800 ft
- PENINSULA BOULEVARD GROUNDWATER PLUMESuperfund · 1900 ft
- PENINSULA BOULEVARD GROUNDWATER PLUMEBrownfields · 1900 ft
- VOGUE CLEANERSBrownfields · 1900 ft
- PIERMONT CLEANERSBrownfields · 2000 ft
- BP #36709Brownfields · 2100 ft
- BPUnderground Storage Tanks · 2200 ft
- INDEPENDENT COACHBrownfields · 2300 ft
- N 1114. 2Nitrate · 2500 ft
- CEDARWOOD CLEANERSBrownfields · 2500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Hewlett Bay Park'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 Bay Park.
Total Sites
5,540
within ~10 miles of Hewlett Bay Park
Risk Level
High
Highest-severity
25 Superfund sites
Sources Checked
within ~10 miles of Hewlett Bay Park
Severity Distribution
within ~10 miles of Hewlett Bay Park
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hewlett Bay Park, Nitrate runs higher than the national average — 1,770 sites within ~10 miles of Hewlett Bay Park. 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 Hewlett Bay Park
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 Bay Park average
Your land is one point inside Hewlett Bay Park
Everything above resolves to Hewlett Bay Park as a whole — one PHZM band and one 28°F frost record, read across 216 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 Bay Park Average
Hewlett Bay Park Average
- ●USDA Zones 7b, averaged across Hewlett Bay Park
- ●One soil character for all of Hewlett Bay Park
- ●Frost dates read at Hewlett Bay Park's scale: Mar 21 to Dec 2
YOUR Parcel
- ✓Your exact zone, not Hewlett Bay Park's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hewlett Bay Park
Pull a site-specific report for your exact address in Hewlett Bay Park, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hewlett Bay Park averages can't show:
We read public map data around Hewlett Bay Park — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hewlett Bay Park average
How we know this about Hewlett Bay Park
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 Bay Park’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 Bay Park
When does frost risk typically end in Hewlett Bay Park?
The last hard freeze (28°F) in Hewlett Bay Park 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 Bay Park?
The first hard freeze (28°F) in Hewlett Bay Park 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 Bay Park?
Measured between 28°F hard freezes, Hewlett Bay Park 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 Bay Park?
The federal record around Hewlett Bay Park runs heavier than most — 5,540 documented sites, mostly Underground Storage Tanks entries (1,950), the nearest Nitrate record about 0.2 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 Bay Park?
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 Bay Park's scale — its 7b band and its 256-day season. Your yard writes its own version of Hewlett Bay Park'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 Bay Park’s own scale
7 of the readings below were taken at Hewlett Bay Park's own scale — its own ~256-day season between 28°F freezes, the 216 acres it covers and 5,540 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hewlett Bay Park's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Hewlett Bay Park's own 28°F hard-freeze dates, about Mar 21 and Dec 2 and the ~256-day span between themNOAA 1991–2020 Climate Normals
- 5,540 documented contamination sites on the federal record near Hewlett Bay Park, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Hewlett Bay Park's boundary and the 216 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 Bay Park 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 Bay Parklydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hewlett Bay Park's 216 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 Bay Park's 216 acreswhy one lot differs from the next →
- Which side of Hewlett Bay Park you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 216 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.2 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 Bay Park-wide figureread your own land →
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