Hudson, New Hampshire, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Growers here do well with cabbage, hazelnut, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Hudson, 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 Hudson 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 Hudson — soil, climate, flood, and parcel records. How we handle your address.
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Hudson — the short answer
Hudson, New Hampshire: USDA zone 6a, about 188 days between hard freezes, across 2K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~188
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 6a is Hudson's average, not your lot's — a low corner or a tree line moves it. Against Hudson's 188-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hudson
Each reading below is measured for Hudson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHudson runs about 188 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHudson sits in USDA hardiness zone 6a.
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 Hudson is in
Hudson sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hudson's own centroid, and it is not what its county reads: Hillsborough County is mostly Northeastern Highlands. The wider page above you is answering a different question about different ground.
What Grows in Hudson
Every plant below cleared Hudson's own zone 6a and its 188-day season. Each card opens that plant's New Hampshire profile. How we score.
Is it too late to plant in Hudson?
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 Mar 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 22 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Hudson
Spotted lanternfly documented 11 miles from Hudson, first recorded 2022. What to watch for.
What's on the federal record near Hudson
Closest first, within ~10 miles of Hudson. Listing isn't leaking, and distance isn't exposure.
- FRED FULLER OIL COUnderground Storage Tanks · 750 ft
- PUBLIC WORKS DEPTUnderground Storage Tanks · 1000 ft
- FIRE DEPTUnderground Storage Tanks · 1900 ft
- HUDSON POLICE DEPTUnderground Storage Tanks · 1900 ft
- T J CLAVEAU RUSTPROOFINGUnderground Storage Tanks · 1900 ft
- TATES GARAGEUnderground Storage Tanks · 1900 ft
- EXXON DIV OF CFI 70105 (FMR ADS 107)Underground Storage Tanks · 2400 ft
- FORMER MACDUFFIE PETROLEUMUnderground Storage Tanks · 0.5 mi
- HUDSON CITGOUnderground Storage Tanks · 0.6 mi
- FORMER COATING SYSTEMS INCUnderground Storage Tanks · 0.7 mi
- HUDSON SUNOCOUnderground Storage Tanks · 0.7 mi
- COATING SYSTEMS INCToxics Release Inventory · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hudson'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 Hudson.
Sources Checked
within ~10 miles of Hudson
Severity Distribution
within ~10 miles of Hudson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hudson, two things run higher than the national average within ~10 miles of Hudson — Superfund (25 sites) and Toxics Release Inventory (110 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Hudson
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 Hudson average
Your land is one point inside Hudson
Everything above resolves to Hudson as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Hudson Average
Hudson Average
- ●USDA Zones 6a, averaged across Hudson
- ●One soil character for all of Hudson
- ●Frost dates read at Hudson's scale: Apr 17 to Oct 22
YOUR Parcel
- ✓Your exact zone, not Hudson's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hudson
Pull a site-specific report for your exact address in Hudson, New Hampshire — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hudson averages can't show:
We read public map data around Hudson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hudson average
How we know this about Hudson
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 Hudson’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 Hudson
When does frost risk typically end in Hudson?
The last hard freeze (28°F) in Hudson typically lands around Apr 17, 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 May 8.
When is the first frost in Hudson?
The first hard freeze (28°F) in Hudson typically arrives around Oct 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 8, so the watching starts about Sep 22 — about 188 days after the spring freeze cleared.
How long is the growing season in Hudson?
Measured between 28°F hard freezes, Hudson sees about 188 frost-free days — roughly Apr 17 through Oct 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 8, about 153 days.
Is the soil safe to grow vegetables in Hudson?
The federal record around Hudson runs heavier than most — 1,338 documented sites, mostly Brownfields entries (575), the nearest Underground Storage Tanks record about 0.1 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 Hudson?
From about Sep 22 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hudson's scale — its 6a band and its 188-day season. Your yard writes its own version of Hudson'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 Hudson’s own scale
7 of the readings below were taken at Hudson's own scale — its own ~188-day season between 28°F freezes, the 1,968 acres it covers and 1,338 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hudson's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Hudson's own 28°F hard-freeze dates, about Apr 17 and Oct 22 and the ~188-day span between themNOAA 1991–2020 Climate Normals
- 1,338 documented contamination sites on the federal record near Hudson, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Hudson's boundary and the 1,968 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~188-day seasonGrowable Ground crop-matching engine
- Hudson 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 Hudsonlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hudson's 1,968 acres read through its county's SSURGO summaryfrom Hillsborough County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hillsborough County
- The growing challenges every New Hampshire grower plans around — written at state scale, so they stay on the state guidefrom New Hampshire
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Hillsborough County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hudson's 1,968 acreswhy one lot differs from the next →
- Which side of Hudson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,968 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Hudson-wide figureread your own land →
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