Shiloh, Illinois, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, cabbage, hazelnut, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Shiloh, 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 Shiloh 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 Shiloh — soil, climate, flood, and parcel records. How we handle your address.
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Shiloh — the short answer
Shiloh, Illinois: USDA zone 7a, about 231 days between hard freezes, across 8K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~231
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 8K 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 Shiloh's average, not your lot's — a low corner or a tree line moves it. Against Shiloh's 231-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Shiloh
Each reading below is measured for Shiloh itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredShiloh runs about 231 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
MeasuredShiloh 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 Shiloh is in
Shiloh sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Shiloh's own centroid rather than borrowed from St. Clair County.
What Grows in Shiloh
Every plant below cleared Shiloh's own zone 7a and its 231-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Shiloh?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 10 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Shiloh
Survey cells within 31 miles of Shiloh checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 238 miles off. What to watch for.
What's on the federal record near Shiloh
Closest first, within ~10 miles of Shiloh. Listing isn't leaking, and distance isn't exposure.
- AmeritechUnderground Storage Tanks · 0.6 mi
- Community Sports, Inc.Underground Storage Tanks · 1.1 mi
- Circle K #1343Underground Storage Tanks · 1.2 mi
- Flip Phillips Const CoincUnderground Storage Tanks · 1.4 mi
- Shiloh Valley Ag SerUnderground Storage Tanks · 1.4 mi
- Greenmount MotomartUnderground Storage Tanks · 1.5 mi
- Circle K #1341Underground Storage Tanks · 1.7 mi
- MEMORIAL HOSPITAL EASTBrownfields · 1.7 mi
- CVS PHARMACY #16869Brownfields · 1.7 mi
- TARGET STORE 1539Brownfields · 1.7 mi
- Memorial Hospital EastUnderground Storage Tanks · 1.7 mi
- Kings Mart, Inc.Underground Storage Tanks · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Shiloh'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 Shiloh.
Total Sites
714
within ~10 miles of Shiloh
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Shiloh
Severity Distribution
within ~10 miles of Shiloh
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Shiloh, PFAS runs higher than the national average — 7 sites within ~10 miles of Shiloh. That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Shiloh
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 Shiloh average
Your land is one point inside Shiloh
Everything above resolves to Shiloh as a whole — one PHZM band and one 28°F frost record, read across 8K 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 Shiloh Average
Shiloh Average
- ●USDA Zones 7a, averaged across Shiloh
- ●One soil character for all of Shiloh
- ●Frost dates read at Shiloh's scale: Mar 24 to Nov 10
YOUR Parcel
- ✓Your exact zone, not Shiloh's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Shiloh
Pull a site-specific report for your exact address in Shiloh, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Shiloh averages can't show:
We read public map data around Shiloh — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Shiloh average
How we know this about Shiloh
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 Shiloh’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 Shiloh
When does frost risk typically end in Shiloh?
The last hard freeze (28°F) in Shiloh typically lands around Mar 24, 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 14.
When is the first frost in Shiloh?
The first hard freeze (28°F) in Shiloh typically arrives around Nov 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 27, so the watching starts about Oct 11 — about 231 days after the spring freeze cleared.
How long is the growing season in Shiloh?
Measured between 28°F hard freezes, Shiloh sees about 231 frost-free days — roughly Mar 24 through Nov 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Oct 27, about 196 days.
Is the soil safe to grow vegetables in Shiloh?
The federal record around Shiloh is a meaningful one — 714 documented sites, mostly Underground Storage Tanks entries (430), the nearest Underground Storage Tanks 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 Shiloh?
From about Oct 11 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Shiloh's scale — its 7a band and its 231-day season. Your yard writes its own version of Shiloh'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 Shiloh’s own scale
7 of the readings below were taken at Shiloh's own scale — its own ~231-day season between 28°F freezes, the 8,006 acres it covers and 714 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Shiloh's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Shiloh's own 28°F hard-freeze dates, about Mar 24 and Nov 10 and the ~231-day span between themNOAA 1991–2020 Climate Normals
- 714 documented contamination sites on the federal record near Shiloh, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Shiloh's boundary and the 8,006 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~231-day seasonGrowable Ground crop-matching engine
- The ecoregion at Shiloh's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Shiloh checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Shiloh's 8,006 acres read through its county's SSURGO summaryfrom St. Clair County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Clair 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 St. Clair County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Shiloh's 8,006 acreswhy one lot differs from the next →
- Which side of Shiloh you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,006 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Shiloh-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisShiloh sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides