Gibson City, Illinois, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Gibson City, 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 Gibson City 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 Gibson City — soil, climate, flood, and parcel records. How we handle your address.
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Gibson City — the short answer
Gibson City, Illinois: USDA zone 6a, about 202 days between hard freezes, across 1K acres of city.
- USDA zone
- 6a
- 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 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~202
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City 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 6a is Gibson City's average, not your lot's — a low corner or a tree line moves it. Against Gibson City's 202-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Gibson City
Each reading below is measured for Gibson City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGibson City runs about 202 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
MeasuredGibson City 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 Gibson City is in
Gibson City sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Gibson City's own centroid rather than borrowed from Ford County.
What Grows in Gibson City
Every plant below cleared Gibson City's own zone 6a and its 202-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Gibson City?
Rarely: the season closes in stages, not all at once, and each stage has its crops. 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 27 — 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.
What's on the federal record near Gibson City
Closest first, within ~10 miles of Gibson City. Listing isn't leaking, and distance isn't exposure.
- LAIDLAWBrownfields · 500 ft
- Alliance Grain CompanyUnderground Storage Tanks · 500 ft
- Alliance Grain CoUnderground Storage Tanks · 750 ft
- DAVIS WELDINGBrownfields · 950 ft
- Hj Peters Repair SerUnderground Storage Tanks · 1000 ft
- K&K COATINGBrownfields · 1200 ft
- GIBSON CITY POST OFFICEBrownfields · 1200 ft
- JOHNSON MOTOR SVCBrownfields · 1200 ft
- Drummer TownshipUnderground Storage Tanks · 1200 ft
- Lee BarryUnderground Storage Tanks · 1200 ft
- RICKEYS STAR CLEANERS INCBrownfields · 1300 ft
- ANDERSON FORDBrownfields · 1300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Gibson City'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 Gibson City.
Total Sites
94
within ~10 miles of Gibson City
Risk Level
Moderate
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Gibson City
Severity Distribution
within ~10 miles of Gibson City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Gibson City, CAFO runs higher than the national average — 4 sites within ~10 miles of Gibson City. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in Gibson City
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 Gibson City average
Your land is one point inside Gibson City
Everything above resolves to Gibson City 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 city 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 Gibson City Average
Gibson City Average
- ●USDA Zones 6a, averaged across Gibson City
- ●One soil character for all of Gibson City
- ●Frost dates read at Gibson City's scale: Apr 8 to Oct 27
YOUR Parcel
- ✓Your exact zone, not Gibson City's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Gibson City
Pull a site-specific report for your exact address in Gibson City, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Gibson City averages can't show:
We read public map data around Gibson City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Gibson City average
How we know this about Gibson City
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Gibson City’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 city grain anywhere on this page — there is no city-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 Gibson City
When does frost risk typically end in Gibson City?
The last hard freeze (28°F) in Gibson City 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 Gibson City?
The first hard freeze (28°F) in Gibson City typically arrives around Oct 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 13, so the watching starts about Sep 27 — about 202 days after the spring freeze cleared.
How long is the growing season in Gibson City?
Measured between 28°F hard freezes, Gibson City sees about 202 frost-free days — roughly Apr 8 through Oct 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 29 to Oct 13, about 167 days.
Is the soil safe to grow vegetables in Gibson City?
The federal record around Gibson City shows 94 documented sites, mostly Underground Storage Tanks entries (54), the nearest Brownfields record under a tenth of a mile out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Gibson City?
From about Sep 27 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 27 (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 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Gibson City's scale — its 6a band and its 202-day season. Your yard writes its own version of Gibson City'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 Gibson City’s own scale
6 of the readings below were taken at Gibson City's own scale — its own ~202-day season between 28°F freezes, the 1,485 acres it covers and 94 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Gibson City's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Gibson City's own 28°F hard-freeze dates, about Apr 8 and Oct 27 and the ~202-day span between themNOAA 1991–2020 Climate Normals
- 94 documented contamination sites on the federal record near Gibson City, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Gibson City's boundary and the 1,485 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~202-day seasonGrowable Ground crop-matching engine
- The ecoregion at Gibson City's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Gibson City's 1,485 acres read through its county's SSURGO summaryfrom Ford County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Ford County
- The growing challenges every Illinois grower plans around — written at state scale, so they stay on the state guidefrom Illinois
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Ford County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Gibson City's 1,485 acreswhy one lot differs from the next →
- Which side of Gibson City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,485 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Gibson City-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisGibson City sits outside our named growing regions, so Illinois as a whole is its closest context here.