Lloyd Harbor, New York, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Lloyd Harbor, 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 Lloyd Harbor 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 Lloyd Harbor — soil, climate, flood, and parcel records. How we handle your address.
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Lloyd Harbor — the short answer
Lloyd Harbor, New York: USDA zone 7b, about 249 days between hard freezes, across 6K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~249
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 6K 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 Lloyd Harbor's average, not your lot's — a low corner or a tree line moves it. Against Lloyd Harbor's 249-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lloyd Harbor
Each reading below is measured for Lloyd Harbor itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLloyd Harbor runs about 249 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
MeasuredLloyd Harbor 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 Lloyd Harbor is in
Lloyd Harbor sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Lloyd Harbor'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 Lloyd Harbor
Every plant below cleared Lloyd Harbor's own zone 7b and its 249-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Lloyd Harbor?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 28 — 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 Lloyd Harbor
Spotted lanternfly documented 2 miles from Lloyd Harbor, first recorded 2023. What to watch for.
What's on the federal record near Lloyd Harbor
Closest first, within ~10 miles of Lloyd Harbor. Listing isn't leaking, and distance isn't exposure.
- CAUMSETT STATE PARKUnderground Storage Tanks · 1.6 mi
- S 4466. 1Nitrate · 1.6 mi
- S 19198. 1Nitrate · 1.9 mi
- S R L MOTORCARSBrownfields · 2.4 mi
- S 31039. 1Nitrate · 2.7 mi
- S 71533. 1Nitrate · 2.7 mi
- S 45053. 1Nitrate · 2.8 mi
- VITTORIO AUTO BODYBrownfields · 2.9 mi
- DEPALO & SONS AUTO BODY INCBrownfields · 3.0 mi
- USA SERVICE STATIONUnderground Storage Tanks · 3.0 mi
- WALL STREET CLEANERSBrownfields · 3.0 mi
- CVS PHARMACY #0011Brownfields · 3.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lloyd Harbor'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 Lloyd Harbor.
Sources Checked
within ~10 miles of Lloyd Harbor
Severity Distribution
within ~10 miles of Lloyd Harbor
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lloyd Harbor, Nitrate runs higher than the national average — 478 sites within ~10 miles of Lloyd Harbor. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Lloyd Harbor
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 Lloyd Harbor average
Your land is one point inside Lloyd Harbor
Everything above resolves to Lloyd Harbor as a whole — one PHZM band and one 28°F frost record, read across 6K 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 Lloyd Harbor Average
Lloyd Harbor Average
- ●USDA Zones 7b, averaged across Lloyd Harbor
- ●One soil character for all of Lloyd Harbor
- ●Frost dates read at Lloyd Harbor's scale: Mar 24 to Nov 28
YOUR Parcel
- ✓Your exact zone, not Lloyd Harbor's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lloyd Harbor
Pull a site-specific report for your exact address in Lloyd Harbor, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lloyd Harbor averages can't show:
We read public map data around Lloyd Harbor — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lloyd Harbor average
How we know this about Lloyd Harbor
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 Lloyd Harbor’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 Lloyd Harbor
When does frost risk typically end in Lloyd Harbor?
The last hard freeze (28°F) in Lloyd Harbor typically lands around Mar 24, 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 14.
When is the first frost in Lloyd Harbor?
The first hard freeze (28°F) in Lloyd Harbor typically arrives around Nov 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 14, so the watching starts about Oct 29 — about 249 days after the spring freeze cleared.
How long is the growing season in Lloyd Harbor?
Measured between 28°F hard freezes, Lloyd Harbor sees about 249 frost-free days — roughly Mar 24 through Nov 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 14, about 214 days.
Is the soil safe to grow vegetables in Lloyd Harbor?
The federal record around Lloyd Harbor is a meaningful one — 1,097 documented sites, mostly Nitrate entries (478), the nearest Underground Storage Tanks record about 1.6 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 Lloyd Harbor?
From about Oct 29 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lloyd Harbor's scale — its 7b band and its 249-day season. Your yard writes its own version of Lloyd Harbor'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 Lloyd Harbor’s own scale
7 of the readings below were taken at Lloyd Harbor's own scale — its own ~249-day season between 28°F freezes, the 5,972 acres it covers and 1,097 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lloyd Harbor's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Lloyd Harbor's own 28°F hard-freeze dates, about Mar 24 and Nov 28 and the ~249-day span between themNOAA 1991–2020 Climate Normals
- 1,097 documented contamination sites on the federal record near Lloyd Harbor, the closest Underground Storage Tanks record about 1.6 miles out from the town centreFederal environmental registers
- Lloyd Harbor's boundary and the 5,972 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~249-day seasonGrowable Ground crop-matching engine
- Lloyd Harbor 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 Lloyd Harborlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Lloyd Harbor's 5,972 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 Lloyd Harbor's 5,972 acreswhy one lot differs from the next →
- Which side of Lloyd Harbor you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,972 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.6 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 Lloyd Harbor-wide figureread your own land →
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