Mahopac, New York, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Mahopac, 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 Mahopac 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 Mahopac — soil, climate, flood, and parcel records. How we handle your address.
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Mahopac — the short answer
Mahopac, New York: USDA zone 6b, about 206 days between hard freezes, across 4K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~206
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 4K 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 6b is Mahopac's average, not your lot's — a low corner or a tree line moves it. Against Mahopac's 206-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mahopac
Each reading below is measured for Mahopac itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMahopac runs about 206 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
MeasuredMahopac sits in USDA hardiness zone 6b.
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 Mahopac is in
Mahopac sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Mahopac's own centroid, and it is not what its county reads: Putnam County is mostly Northeastern Highlands. The wider page above you is answering a different question about different ground.
What Grows in Mahopac
Every plant below cleared Mahopac's own zone 6b and its 206-day season. Each card opens that plant's New York profile. How we score.
Is it too late to plant in Mahopac?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 31 — 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 Mahopac
Spotted lanternfly documented 2 miles from Mahopac, first recorded 2022. What to watch for.
What's on the federal record near Mahopac
Closest first, within ~10 miles of Mahopac. Listing isn't leaking, and distance isn't exposure.
- MAHOPAC PETRO PLAZA #219Underground Storage Tanks · 300 ft
- MOBIL R/S #10942Underground Storage Tanks · 550 ft
- RAINBOW CLEANERS OF PUTNAM COUNTY INCBrownfields · 850 ft
- NEW YORK TELEPHONEUnderground Storage Tanks · 850 ft
- P 40Nitrate · 900 ft
- CHERRY LANE CITGOUnderground Storage Tanks · 1200 ft
- LAKE MAHOPAC TAILORSBrownfields · 1400 ft
- P 34Nitrate · 1500 ft
- NEW RAGE CYCLESToxics Release Inventory · 1500 ft
- SCHIPP CONSTRUCTION CO INCUnderground Storage Tanks · 1800 ft
- P 39Nitrate · 1800 ft
- SCHIPP CONST CO INCBrownfields · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Mahopac'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 Mahopac.
Sources Checked
within ~10 miles of Mahopac
Severity Distribution
within ~10 miles of Mahopac
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mahopac, PFAS runs higher than the national average — 7 sites within ~10 miles of Mahopac. That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Mahopac
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 Mahopac average
Your land is one point inside Mahopac
Everything above resolves to Mahopac as a whole — one PHZM band and one 28°F frost record, read across 4K 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 Mahopac Average
Mahopac Average
- ●USDA Zones 6b, averaged across Mahopac
- ●One soil character for all of Mahopac
- ●Frost dates read at Mahopac's scale: Apr 8 to Oct 31
YOUR Parcel
- ✓Your exact zone, not Mahopac's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mahopac
Pull a site-specific report for your exact address in Mahopac, New York — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mahopac averages can't show:
We read public map data around Mahopac — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mahopac average
How we know this about Mahopac
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 Mahopac’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 Mahopac
When does frost risk typically end in Mahopac?
The last hard freeze (28°F) in Mahopac typically lands around Apr 8, 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 29.
When is the first frost in Mahopac?
The first hard freeze (28°F) in Mahopac typically arrives around Oct 31, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 17, so the watching starts about Oct 1 — about 206 days after the spring freeze cleared.
How long is the growing season in Mahopac?
Measured between 28°F hard freezes, Mahopac sees about 206 frost-free days — roughly Apr 8 through Oct 31, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 29 to Oct 17, about 171 days.
Is the soil safe to grow vegetables in Mahopac?
The federal record around Mahopac runs heavier than most — 551 documented sites, mostly Underground Storage Tanks entries (214), the nearest Underground Storage Tanks record under a tenth of a mile 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 Mahopac?
From about Oct 1 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 Oct 31 (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 Oct 31. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Mahopac's scale — its 6b band and its 206-day season. Your yard writes its own version of Mahopac'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 Mahopac’s own scale
7 of the readings below were taken at Mahopac's own scale — its own ~206-day season between 28°F freezes, the 3,923 acres it covers and 551 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mahopac's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Mahopac's own 28°F hard-freeze dates, about Apr 8 and Oct 31 and the ~206-day span between themNOAA 1991–2020 Climate Normals
- 551 documented contamination sites on the federal record near Mahopac, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Mahopac's boundary and the 3,923 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~206-day seasonGrowable Ground crop-matching engine
- Mahopac 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 Mahopaclydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mahopac's 3,923 acres read through its county's SSURGO summaryfrom Putnam County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Putnam 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 Putnam County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mahopac's 3,923 acreswhy one lot differs from the next →
- Which side of Mahopac you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,923 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Mahopac-wide figureread your own land →