Flower Hill, New York, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Reliable performers under these conditions include cabbage, prickly pear, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Flower Hill, 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 Flower Hill 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 Flower Hill — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Flower Hill — the short answer
Flower Hill, New York: USDA zone 7b, about 250 days between hard freezes, across 1K 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 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~250
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Flower Hill's average, not your lot's — a low corner or a tree line moves it. Against Flower Hill's 250-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Flower Hill
Each reading below is measured for Flower Hill itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFlower Hill runs about 250 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
MeasuredFlower Hill 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 Flower Hill is in
Flower Hill sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Flower Hill's own centroid rather than borrowed from Nassau County.
What Grows in Flower Hill
Every plant below cleared Flower Hill's own zone 7b and its 250-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Flower Hill?
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 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 29 — 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 Flower Hill
Spotted lanternfly documented 1 miles from Flower Hill, first recorded 2020. What to watch for.
What's on the federal record near Flower Hill
Closest first, within ~10 miles of Flower Hill. Listing isn't leaking, and distance isn't exposure.
- N 1120. 4Nitrate · 900 ft
- N 9809. 2Nitrate · 1300 ft
- PORT WASHINGTON WATER DISTRICT - STONYTOWN FACILITYBrownfields · 1500 ft
- N 9903. 1Nitrate · 1500 ft
- N 3742. 1Nitrate · 1700 ft
- ST. FRANCIS HOSPITALUnderground Storage Tanks · 1800 ft
- ST FRANCIS HOSPITALBrownfields · 2600 ft
- N 4223. 2Nitrate · 0.5 mi
- MUNSEY PARK WELL STATIONUnderground Storage Tanks · 0.5 mi
- N 9906. 1Nitrate · 0.6 mi
- N 2052. 2Nitrate · 0.6 mi
- SOUTHPORT ELEVATED WATER STORAGE TANKBrownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Flower Hill'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 Flower Hill.
Sources Checked
within ~10 miles of Flower Hill
Severity Distribution
within ~10 miles of Flower Hill
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Flower Hill, Nitrate runs higher than the national average — 2,270 sites within ~10 miles of Flower Hill. 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 Flower Hill
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 Flower Hill average
Your land is one point inside Flower Hill
Everything above resolves to Flower Hill as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Flower Hill Average
Flower Hill Average
- ●USDA Zones 7b, averaged across Flower Hill
- ●One soil character for all of Flower Hill
- ●Frost dates read at Flower Hill's scale: Mar 24 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Flower Hill's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Flower Hill
Pull a site-specific report for your exact address in Flower Hill, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Flower Hill averages can't show:
We read public map data around Flower Hill — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Flower Hill average
How we know this about Flower Hill
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 Flower Hill’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 Flower Hill
When does frost risk typically end in Flower Hill?
The last hard freeze (28°F) in Flower Hill 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 Flower Hill?
The first hard freeze (28°F) in Flower Hill typically arrives around Nov 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 15, so the watching starts about Oct 30 — about 250 days after the spring freeze cleared.
How long is the growing season in Flower Hill?
Measured between 28°F hard freezes, Flower Hill sees about 250 frost-free days — roughly Mar 24 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 15, about 215 days.
Is the soil safe to grow vegetables in Flower Hill?
The federal record around Flower Hill runs heavier than most — 6,418 documented sites, mostly Nitrate entries (2,270), 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 Flower Hill?
From about Oct 30 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 29 (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 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Flower Hill's scale — its 7b band and its 250-day season. Your yard writes its own version of Flower Hill'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 Flower Hill’s own scale
7 of the readings below were taken at Flower Hill's own scale — its own ~250-day season between 28°F freezes, the 1,032 acres it covers and 6,418 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Flower Hill's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Flower Hill's own 28°F hard-freeze dates, about Mar 24 and Nov 29 and the ~250-day span between themNOAA 1991–2020 Climate Normals
- 6,418 documented contamination sites on the federal record near Flower Hill, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Flower Hill's boundary and the 1,032 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~250-day seasonGrowable Ground crop-matching engine
- The ecoregion at Flower Hill's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Flower Hilllydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Flower Hill's 1,032 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 Flower Hill's 1,032 acreswhy one lot differs from the next →
- Which side of Flower Hill you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,032 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 Flower Hill-wide figureread your own land →