Stafford Springs, Connecticut, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Stafford Springs, 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 Stafford Springs 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 Stafford Springs — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Stafford Springs — the short answer
Stafford Springs, Connecticut: USDA zone 6a, about 191 days between hard freezes, across 4K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~191
- 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 6a is Stafford Springs's average, not your lot's — a low corner or a tree line moves it. Against Stafford Springs's 191-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Stafford Springs
Each reading below is measured for Stafford Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.

Season length
MeasuredStafford Springs runs about 191 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
MeasuredStafford Springs 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 Stafford Springs is in
Stafford Springs sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Stafford Springs's own centroid rather than borrowed from Capitol Planning Region.
What Grows in Stafford Springs
Every plant below cleared Stafford Springs's own zone 6a and its 191-day season. Each card opens that plant's Connecticut profile. How we score.






























Is it too late to plant in Stafford Springs?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — 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 Stafford Springs
Spotted lanternfly documented 11 miles from Stafford Springs, first recorded 2022. What to watch for.
What's on the federal record near Stafford Springs
Closest first, within ~10 miles of Stafford Springs. Listing isn't leaking, and distance isn't exposure.
- STANLEY PARKER CHEVROLET INCBrownfields · 0.6 mi
- 7 ELEVEN 32521Brownfields · 0.7 mi
- WARREN LORO PIANA MLLBrownfields · 0.8 mi
- WILLINGTON NAMEPLATE, INC.Brownfields · 0.8 mi
- PACKAGE MACHINERY CO REED DIVToxics Release Inventory · 0.9 mi
- Memorial ApartmentsUnderground Storage Tanks · 0.9 mi
- STAFFORD SPRINGS CENTRAL OFFICE (5551)Underground Storage Tanks · 0.9 mi
- WARREN CYRIL JOHNSON PLANTToxics Release Inventory · 0.9 mi
- CVS PHARMACY #10605Brownfields · 1.0 mi
- STAFFORD CLEANERSBrownfields · 1.0 mi
- HOBBS MEDICAL INCBrownfields · 1.0 mi
- LINATEX CORPORATION OF AMERICAToxics Release Inventory · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Stafford Springs'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 Stafford Springs.
Total Sites
386
within ~10 miles of Stafford Springs
Risk Level
Elevated
Highest-severity
6 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Stafford Springs
Severity Distribution
within ~10 miles of Stafford Springs
Highest-Severity Sites

A note from Gnorman
What an experienced grower watches for around here
In and around Stafford Springs, Superfund runs higher than the national average — 6 sites within ~10 miles of Stafford Springs. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Stafford Springs
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 Stafford Springs average
Your land is one point inside Stafford Springs
Everything above resolves to Stafford Springs 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 Stafford Springs Average
Stafford Springs Average
- ●USDA Zones 6a, averaged across Stafford Springs
- ●One soil character for all of Stafford Springs
- ●Frost dates read at Stafford Springs's scale: Apr 15 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Stafford Springs's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Stafford Springs
Pull a site-specific report for your exact address in Stafford Springs, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Stafford Springs averages can't show:
We read public map data around Stafford Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Stafford Springs average
How we know this about Stafford Springs
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 Stafford Springs’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 Stafford Springs
When does frost risk typically end in Stafford Springs?
The last hard freeze (28°F) in Stafford Springs typically lands around Apr 15, 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 6.
When is the first frost in Stafford Springs?
The first hard freeze (28°F) in Stafford Springs typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 191 days after the spring freeze cleared.
How long is the growing season in Stafford Springs?
Measured between 28°F hard freezes, Stafford Springs sees about 191 frost-free days — roughly Apr 15 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 9, about 156 days.
Is the soil safe to grow vegetables in Stafford Springs?
The federal record around Stafford Springs is a meaningful one — 386 documented sites, mostly Underground Storage Tanks entries (178), the nearest Brownfields record about 0.6 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 Stafford Springs?
From about Sep 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Stafford Springs's scale — its 6a band and its 191-day season. Your yard writes its own version of Stafford Springs'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 Stafford Springs’s own scale
7 of the readings below were taken at Stafford Springs's own scale — its own ~191-day season between 28°F freezes, the 4,080 acres it covers and 386 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Stafford Springs's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Stafford Springs's own 28°F hard-freeze dates, about Apr 15 and Oct 23 and the ~191-day span between themNOAA 1991–2020 Climate Normals
- 386 documented contamination sites on the federal record near Stafford Springs, the closest Brownfields record about 0.6 miles out from the town centreFederal environmental registers
- Stafford Springs's boundary and the 4,080 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~191-day seasonGrowable Ground crop-matching engine
- The ecoregion at Stafford Springs's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Stafford Springslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Stafford Springs's 4,080 acres read through its county's SSURGO summaryfrom Capitol County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Capitol 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 Capitol County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Stafford Springs's 4,080 acreswhy one lot differs from the next →
- Which side of Stafford Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,080 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.6 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 Stafford Springs-wide figureread your own land →
