Plattville, Illinois, sits in USDA hardiness zone 5b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, cranberry, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Plattville, 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 Plattville 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 Plattville — soil, climate, flood, and parcel records. How we handle your address.
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Plattville — the short answer
Plattville, Illinois: USDA zone 5b, about 202 days between hard freezes, across 1K acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~202
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town 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 5b is Plattville's average, not your lot's — a low corner or a tree line moves it. Against Plattville's 202-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Plattville
Each reading below is measured for Plattville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPlattville 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
MeasuredPlattville sits in USDA hardiness zone 5b.
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 Plattville is in
Plattville sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Plattville's own centroid rather than borrowed from Kendall County.
What Grows in Plattville
Every plant below cleared Plattville's own zone 5b and its 202-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Plattville?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — 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 Plattville
Spotted lanternfly documented 23 miles from Plattville, first recorded 2023. What to watch for.
What's on the federal record near Plattville
Closest first, within ~10 miles of Plattville. Listing isn't leaking, and distance isn't exposure.
- Anderson Farm Service, Inc.Underground Storage Tanks · 2.6 mi
- Kuntz DonaldUnderground Storage Tanks · 2.7 mi
- L&B TRIKESBrownfields · 3.1 mi
- FRIESON DAIRY % KIRK FRIESTADCAFO · 3.5 mi
- Walker's Service StationUnderground Storage Tanks · 3.9 mi
- Seward Township OfUnderground Storage Tanks · 4.2 mi
- Scott LeoUnderground Storage Tanks · 4.4 mi
- CHANNAHONPFAS · 4.5 mi
- SHADY OAKS MHPPFAS · 4.5 mi
- MINOOKAPFAS · 4.5 mi
- Homerding John WUnderground Storage Tanks · 5.4 mi
- IDOT YORKVILLEBrownfields · 5.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Plattville'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 Plattville.
Total Sites
216
within ~10 miles of Plattville
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Plattville
Severity Distribution
within ~10 miles of Plattville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Plattville, PFAS runs higher than the national average — 7 sites within ~10 miles of Plattville. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Plattville
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 Plattville average
Your land is one point inside Plattville
Everything above resolves to Plattville 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 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 Plattville Average
Plattville Average
- ●USDA Zones 5b, averaged across Plattville
- ●One soil character for all of Plattville
- ●Frost dates read at Plattville's scale: Apr 10 to Oct 29
YOUR Parcel
- ✓Your exact zone, not Plattville's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Plattville
Pull a site-specific report for your exact address in Plattville, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Plattville averages can't show:
We read public map data around Plattville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Plattville average
How we know this about Plattville
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 Plattville’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 Plattville
When does frost risk typically end in Plattville?
The last hard freeze (28°F) in Plattville typically lands around Apr 10, 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 1.
When is the first frost in Plattville?
The first hard freeze (28°F) in Plattville typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 202 days after the spring freeze cleared.
How long is the growing season in Plattville?
Measured between 28°F hard freezes, Plattville sees about 202 frost-free days — roughly Apr 10 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 15, about 167 days.
Is the soil safe to grow vegetables in Plattville?
The federal record around Plattville is a meaningful one — 216 documented sites, mostly Underground Storage Tanks entries (97), the nearest Underground Storage Tanks record about 2.6 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 Plattville?
From about Sep 29 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 29 (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 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Plattville's scale — its 5b band and its 202-day season. Your yard writes its own version of Plattville'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 Plattville’s own scale
7 of the readings below were taken at Plattville's own scale — its own ~202-day season between 28°F freezes, the 1,446 acres it covers and 216 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Plattville's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Plattville's own 28°F hard-freeze dates, about Apr 10 and Oct 29 and the ~202-day span between themNOAA 1991–2020 Climate Normals
- 216 documented contamination sites on the federal record near Plattville, the closest Underground Storage Tanks record about 2.6 miles out from the town centreFederal environmental registers
- Plattville's boundary and the 1,446 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~202-day seasonGrowable Ground crop-matching engine
- The ecoregion at Plattville's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Plattvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Plattville's 1,446 acres read through its county's SSURGO summaryfrom Kendall County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Kendall 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 Kendall County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Plattville's 1,446 acreswhy one lot differs from the next →
- Which side of Plattville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,446 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 2.6 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 Plattville-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisPlattville sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides