Radom, Illinois, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, hazelnut, lavender, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Radom, 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 Radom 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 Radom — soil, climate, flood, and parcel records. How we handle your address.
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Radom — the short answer
Radom, Illinois: USDA zone 6b, about 224 days between hard freezes, across 671 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~224
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 671 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 6b is Radom's average, not your lot's — a low corner or a tree line moves it. Against Radom's 224-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Radom
Each reading below is measured for Radom itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRadom runs about 224 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
MeasuredRadom sits in USDA hardiness zone 6b.
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 Radom is in
Radom sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Radom's own centroid rather than borrowed from Washington County.
What Grows in Radom
Every plant below cleared Radom's own zone 6b and its 224-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Radom?
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 Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 6 — 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.
What's on the federal record near Radom
Closest first, within ~10 miles of Radom. Listing isn't leaking, and distance isn't exposure.
- Frank's PlaceUnderground Storage Tanks · 800 ft
- Jax Asphalt CoUnderground Storage Tanks · 1000 ft
- Baldridge Drilling Co IncUnderground Storage Tanks · 2.2 mi
- Action Amusement CoUnderground Storage Tanks · 3.2 mi
- Popecks Convenience StoreUnderground Storage Tanks · 3.2 mi
- AT AND TBrownfields · 3.2 mi
- Paradigm Properties, Inc.Underground Storage Tanks · 3.2 mi
- Dubois Grocery/Mark PyszkaUnderground Storage Tanks · 3.9 mi
- Clifford PolczynskiUnderground Storage Tanks · 4.0 mi
- THE MASCHHOFFS - KUJAWA FACILITYCAFO · 4.3 mi
- Larry Old Ser StationUnderground Storage Tanks · 6.8 mi
- RON NIEDBALSKI DAIRYCAFO · 6.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Radom'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 Radom.
Total Sites
33
within ~10 miles of Radom
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Radom
Severity Distribution
within ~10 miles of Radom
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Radom, Underground Storage Tanks runs higher than the national average — 25 sites within ~10 miles of Radom. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Radom
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 Radom average
Your land is one point inside Radom
Everything above resolves to Radom as a whole — one PHZM band and one 28°F frost record, read across 671 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 Radom Average
Radom Average
- ●USDA Zones 6b, averaged across Radom
- ●One soil character for all of Radom
- ●Frost dates read at Radom's scale: Mar 27 to Nov 6
YOUR Parcel
- ✓Your exact zone, not Radom's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Radom
Pull a site-specific report for your exact address in Radom, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Radom averages can't show:
We read public map data around Radom — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Radom average
How we know this about Radom
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 Radom’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 Radom
When does frost risk typically end in Radom?
The last hard freeze (28°F) in Radom typically lands around Mar 27, 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 17.
When is the first frost in Radom?
The first hard freeze (28°F) in Radom typically arrives around Nov 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 23, so the watching starts about Oct 7 — about 224 days after the spring freeze cleared.
How long is the growing season in Radom?
Measured between 28°F hard freezes, Radom sees about 224 frost-free days — roughly Mar 27 through Nov 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 23, about 189 days.
Is the soil safe to grow vegetables in Radom?
The federal record around Radom is a meaningful one — 33 documented sites, mostly Underground Storage Tanks entries (25), the nearest Underground Storage Tanks record about 0.2 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 Radom?
From about Oct 7 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 6 (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 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Radom's scale — its 6b band and its 224-day season. Your yard writes its own version of Radom'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 Radom’s own scale
6 of the readings below were taken at Radom's own scale — its own ~224-day season between 28°F freezes, the 671 acres it covers and 33 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Radom's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Radom's own 28°F hard-freeze dates, about Mar 27 and Nov 6 and the ~224-day span between themNOAA 1991–2020 Climate Normals
- 33 documented contamination sites on the federal record near Radom, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Radom's boundary and the 671 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~224-day seasonGrowable Ground crop-matching engine
- The ecoregion at Radom's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Radom's 671 acres read through its county's SSURGO summaryfrom Washington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washington 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 Washington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Radom's 671 acreswhy one lot differs from the next →
- Which side of Radom you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 671 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Radom-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisRadom sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides