Sidell, Illinois, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Sidell, 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 Sidell 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 Sidell — soil, climate, flood, and parcel records. How we handle your address.
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Sidell — the short answer
Sidell, Illinois: USDA zone 6a, about 204 days between hard freezes, across 593 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~204
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 593 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 Sidell's average, not your lot's — a low corner or a tree line moves it. Against Sidell's 204-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Sidell
Each reading below is measured for Sidell itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSidell runs about 204 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
MeasuredSidell 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 Sidell is in
Sidell sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Sidell's own centroid rather than borrowed from Vermilion County.
What Grows in Sidell
Every plant below cleared Sidell's own zone 6a and its 204-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Sidell?
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 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 26 — 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 Sidell
Closest first, within ~10 miles of Sidell. Listing isn't leaking, and distance isn't exposure.
- Country Auto Sales, Inc.Underground Storage Tanks · 250 ft
- Vermilion Ser CoUnderground Storage Tanks · 700 ft
- Closed Standard Oil StationUnderground Storage Tanks · 1500 ft
- Jamaica Cusd 12Underground Storage Tanks · 4.1 mi
- Craig BrothersUnderground Storage Tanks · 4.6 mi
- Trisler FarmsUnderground Storage Tanks · 5.4 mi
- L B FarmsUnderground Storage Tanks · 5.7 mi
- Allerton Self ServiceUnderground Storage Tanks · 5.9 mi
- Allerton Supply CoUnderground Storage Tanks · 5.9 mi
- ALLERTON IMPLEMENT COBrownfields · 6.1 mi
- Shiloh Township OfUnderground Storage Tanks · 7.5 mi
- Shiloh School Unit #2Underground Storage Tanks · 8.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Sidell'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 Sidell.
Total Sites
37
within ~10 miles of Sidell
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Sidell
Severity Distribution
within ~10 miles of Sidell
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Sidell, Underground Storage Tanks runs higher than the national average — 34 sites within ~10 miles of Sidell. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Sidell
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 Sidell average
Your land is one point inside Sidell
Everything above resolves to Sidell as a whole — one PHZM band and one 28°F frost record, read across 593 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 Sidell Average
Sidell Average
- ●USDA Zones 6a, averaged across Sidell
- ●One soil character for all of Sidell
- ●Frost dates read at Sidell's scale: Apr 5 to Oct 26
YOUR Parcel
- ✓Your exact zone, not Sidell's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Sidell
Pull a site-specific report for your exact address in Sidell, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Sidell averages can't show:
We read public map data around Sidell — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Sidell average
How we know this about Sidell
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 Sidell’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 Sidell
When does frost risk typically end in Sidell?
The last hard freeze (28°F) in Sidell typically lands around Apr 5, 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 26.
When is the first frost in Sidell?
The first hard freeze (28°F) in Sidell typically arrives around Oct 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 12, so the watching starts about Sep 26 — about 204 days after the spring freeze cleared.
How long is the growing season in Sidell?
Measured between 28°F hard freezes, Sidell sees about 204 frost-free days — roughly Apr 5 through Oct 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 12, about 169 days.
Is the soil safe to grow vegetables in Sidell?
The federal record around Sidell is light — 37 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (34), the nearest Underground Storage Tanks record under a tenth of a mile out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Sidell?
From about Sep 26 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Sidell's scale — its 6a band and its 204-day season. Your yard writes its own version of Sidell'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 Sidell’s own scale
6 of the readings below were taken at Sidell's own scale — its own ~204-day season between 28°F freezes, the 593 acres it covers and 37 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Sidell's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Sidell's own 28°F hard-freeze dates, about Apr 5 and Oct 26 and the ~204-day span between themNOAA 1991–2020 Climate Normals
- 37 documented contamination sites on the federal record near Sidell, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Sidell's boundary and the 593 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~204-day seasonGrowable Ground crop-matching engine
- The ecoregion at Sidell'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 Sidell's 593 acres read through its county's SSURGO summaryfrom Vermilion County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Vermilion 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 Vermilion County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Sidell's 593 acreswhy one lot differs from the next →
- Which side of Sidell you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 593 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 Sidell-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisSidell sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides