Wilton Center, Connecticut, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, hazelnut, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Wilton Center, 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 Wilton Center 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 Wilton Center — soil, climate, flood, and parcel records. How we handle your address.
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Wilton Center — the short answer
Wilton Center, Connecticut: USDA zone 7a, about 218 days between hard freezes, across 641 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~218
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 641 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 7a is Wilton Center's average, not your lot's — a low corner or a tree line moves it. Against Wilton Center's 218-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wilton Center
Each reading below is measured for Wilton Center itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWilton Center runs about 218 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
MeasuredWilton Center sits in USDA hardiness zone 7a.
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 Wilton Center is in
Wilton Center sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Wilton Center's own centroid rather than borrowed from Western Connecticut Planning Region.
What Grows in Wilton Center
Every plant below cleared Wilton Center's own zone 7a and its 218-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Wilton Center?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 6 — 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 Wilton Center
Spotted lanternfly documented 2 miles from Wilton Center, first recorded 2021. What to watch for.
What's on the federal record near Wilton Center
Closest first, within ~10 miles of Wilton Center. Listing isn't leaking, and distance isn't exposure.
- PE CORPORATIONUnderground Storage Tanks · 400 ft
- BELDEN HILL STATIONUnderground Storage Tanks · 400 ft
- Wilton MB Service IncUnderground Storage Tanks · 400 ft
- FAIRFIELD FARMING DEVELOPMENT COUnderground Storage Tanks · 400 ft
- YANKEE DOODLE BIKE AND MOPEDUnderground Storage Tanks · 400 ft
- J & B SALES & SERVICEUnderground Storage Tanks · 400 ft
- WILTON LAWN SERVICEUnderground Storage Tanks · 400 ft
- CONSUMERS PETROLEUMUnderground Storage Tanks · 400 ft
- WILTON AUTOMOTIVE SERVICE CTR.Underground Storage Tanks · 400 ft
- GEORGETOWN MOTORS, INC.Underground Storage Tanks · 400 ft
- FORMER TEXACO SERVICE STATIONUnderground Storage Tanks · 400 ft
- LOUIS DREYFUS PROPERTY GROUPUnderground Storage Tanks · 400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Wilton Center'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 Wilton Center.
Total Sites
1,186
within ~10 miles of Wilton Center
Risk Level
Elevated
Highest-severity
17 Superfund sites
Sources Checked
within ~10 miles of Wilton Center
Severity Distribution
within ~10 miles of Wilton Center
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wilton Center, Superfund runs higher than the national average — 17 sites within ~10 miles of Wilton Center. 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.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Wilton Center
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 Wilton Center average
Your land is one point inside Wilton Center
Everything above resolves to Wilton Center as a whole — one PHZM band and one 28°F frost record, read across 641 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 Wilton Center Average
Wilton Center Average
- ●USDA Zones 7a, averaged across Wilton Center
- ●One soil character for all of Wilton Center
- ●Frost dates read at Wilton Center's scale: Apr 2 to Nov 6
YOUR Parcel
- ✓Your exact zone, not Wilton Center's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wilton Center
Pull a site-specific report for your exact address in Wilton Center, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wilton Center averages can't show:
We read public map data around Wilton Center — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wilton Center average
How we know this about Wilton Center
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 Wilton Center’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 Wilton Center
When does frost risk typically end in Wilton Center?
The last hard freeze (28°F) in Wilton Center typically lands around Apr 2, 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 23.
When is the first frost in Wilton Center?
The first hard freeze (28°F) in Wilton Center typically arrives around Nov 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 23, so the watching starts about Oct 7 — about 218 days after the spring freeze cleared.
How long is the growing season in Wilton Center?
Measured between 28°F hard freezes, Wilton Center sees about 218 frost-free days — roughly Apr 2 through Nov 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 23, about 183 days.
Is the soil safe to grow vegetables in Wilton Center?
The federal record around Wilton Center is a meaningful one — 1,186 documented sites, mostly Underground Storage Tanks entries (535), the nearest Underground Storage Tanks record under a tenth of a mile 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 Wilton Center?
From about Oct 7 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 6 (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 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wilton Center's scale — its 7a band and its 218-day season. Your yard writes its own version of Wilton Center'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 Wilton Center’s own scale
7 of the readings below were taken at Wilton Center's own scale — its own ~218-day season between 28°F freezes, the 641 acres it covers and 1,186 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wilton Center's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Wilton Center's own 28°F hard-freeze dates, about Apr 2 and Nov 6 and the ~218-day span between themNOAA 1991–2020 Climate Normals
- 1,186 documented contamination sites on the federal record near Wilton Center, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Wilton Center's boundary and the 641 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~218-day seasonGrowable Ground crop-matching engine
- The ecoregion at Wilton Center's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Wilton Centerlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wilton Center's 641 acres read through its county's SSURGO summaryfrom Western Connecticut County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Western Connecticut County
- The growing challenges every Connecticut grower plans around — written at state scale, so they stay on the state guidefrom Connecticut
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Western Connecticut County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wilton Center's 641 acreswhy one lot differs from the next →
- Which side of Wilton Center you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 641 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 Wilton Center-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutWilton Center sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides