Dix Hills, New York, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, prickly pear, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Dix Hills, 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 Dix Hills 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 Dix Hills — soil, climate, flood, and parcel records. How we handle your address.
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Dix Hills — the short answer
Dix Hills, New York: USDA zone 7b, about 246 days between hard freezes, across 10K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~246
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 10K 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 Dix Hills's average, not your lot's — a low corner or a tree line moves it. Against Dix Hills's 246-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Dix Hills
Each reading below is measured for Dix Hills itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDix Hills runs about 246 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
MeasuredDix Hills 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 Dix Hills is in
Dix Hills sits in the Atlantic Coastal Pine Barrens — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Dix Hills's own centroid rather than borrowed from Suffolk County.
What Grows in Dix Hills
Every plant below cleared Dix Hills's own zone 7b and its 246-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Dix Hills?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 23 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 24 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Dix Hills
Spotted lanternfly documented 2 miles from Dix Hills, first recorded 2018. What to watch for.
What's on the federal record near Dix Hills
Closest first, within ~10 miles of Dix Hills. Listing isn't leaking, and distance isn't exposure.
- BOARD OF COOPERATIVE ED SERVICE #3Brownfields · 1700 ft
- WILSON TECHNICAL SCHOOLBrownfields · 2200 ft
- S 45638. 1Nitrate · 2200 ft
- NYSDOT LONG ISLAND EXPRESSWAY EB & NY231 BIN #1049342Brownfields · 2400 ft
- NYSDOT BIN 1049350Brownfields · 0.9 mi
- S 23522. 1Nitrate · 0.9 mi
- S 46283. 1Nitrate · 0.9 mi
- S 75455. 1Nitrate · 1.1 mi
- S 75456. 1Nitrate · 1.1 mi
- S 75454. 2Nitrate · 1.1 mi
- HALF HOLLOW HILLS COMMUNITY LIBRARYBrownfields · 1.2 mi
- HALF HOLLOW HILLS HIGH SCHOOL EASTBrownfields · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Dix Hills'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 Dix Hills.
Sources Checked
within ~10 miles of Dix Hills
Severity Distribution
within ~10 miles of Dix Hills
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Dix Hills, two things run higher than the national average within ~10 miles of Dix Hills — Nitrate (1,544 sites) and Superfund (54 sites). 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.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Dix Hills
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 Dix Hills average
Your land is one point inside Dix Hills
Everything above resolves to Dix Hills as a whole — one PHZM band and one 28°F frost record, read across 10K 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 Dix Hills Average
Dix Hills Average
- ●USDA Zones 7b, averaged across Dix Hills
- ●One soil character for all of Dix Hills
- ●Frost dates read at Dix Hills's scale: Mar 23 to Nov 24
YOUR Parcel
- ✓Your exact zone, not Dix Hills's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Dix Hills
Pull a site-specific report for your exact address in Dix Hills, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Dix Hills averages can't show:
We read public map data around Dix Hills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Dix Hills average
How we know this about Dix Hills
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 Dix Hills’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 Dix Hills
When does frost risk typically end in Dix Hills?
The last hard freeze (28°F) in Dix Hills typically lands around Mar 23, 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 13.
When is the first frost in Dix Hills?
The first hard freeze (28°F) in Dix Hills typically arrives around Nov 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 10, so the watching starts about Oct 25 — about 246 days after the spring freeze cleared.
How long is the growing season in Dix Hills?
Measured between 28°F hard freezes, Dix Hills sees about 246 frost-free days — roughly Mar 23 through Nov 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 13 to Nov 10, about 211 days.
Is the soil safe to grow vegetables in Dix Hills?
The federal record around Dix Hills runs heavier than most — 3,495 documented sites, mostly Brownfields entries (1,608), the nearest Brownfields 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 Dix Hills?
From about Oct 25 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Dix Hills's scale — its 7b band and its 246-day season. Your yard writes its own version of Dix Hills'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 Dix Hills’s own scale
7 of the readings below were taken at Dix Hills's own scale — its own ~246-day season between 28°F freezes, the 10,079 acres it covers and 3,495 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Dix Hills's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Dix Hills's own 28°F hard-freeze dates, about Mar 23 and Nov 24 and the ~246-day span between themNOAA 1991–2020 Climate Normals
- 3,495 documented contamination sites on the federal record near Dix Hills, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Dix Hills's boundary and the 10,079 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~246-day seasonGrowable Ground crop-matching engine
- The ecoregion at Dix Hills's own centroid, the Atlantic Coastal Pine BarrensUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Dix Hillslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Dix Hills's 10,079 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 Dix Hills's 10,079 acreswhy one lot differs from the next →
- Which side of Dix Hills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 10,079 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Dix Hills-wide figureread your own land →