Rantoul, Kansas, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Rantoul, 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 Rantoul 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 Rantoul — soil, climate, flood, and parcel records. How we handle your address.
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Rantoul — the short answer
Rantoul, Kansas: USDA zone 6b, about 219 days between hard freezes, across 94 acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~219
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 94 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 Rantoul's average, not your lot's — a low corner or a tree line moves it. Against Rantoul's 219-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rantoul
Each reading below is measured for Rantoul itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRantoul runs about 219 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
MeasuredRantoul 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 Rantoul is in
Rantoul sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Rantoul's own centroid rather than borrowed from Franklin County.
What Grows in Rantoul
Every plant below cleared Rantoul's own zone 6b and its 219-day season. Each card opens that plant's Kansas profile. How we score.
Is it too late to plant in Rantoul?
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 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 31 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 5 — 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.
Documented around Rantoul
Survey cells within 31 miles of Rantoul checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 424 miles off. What to watch for.
What's on the federal record near Rantoul
Closest first, within ~10 miles of Rantoul. Listing isn't leaking, and distance isn't exposure.
- TOWN & COUNTRY CHEV-OLD-BUICKUnderground Storage Tanks · 600 ft
- RANTOUL SERVICEUnderground Storage Tanks · 650 ft
- 17S 21E 21CCC 02Nitrate · 850 ft
- 17S 21E 21CCC 01Nitrate · 850 ft
- TERRA RESOURES INCBrownfields · 0.7 mi
- DODSON INT. PARTS. INC.Brownfields · 0.7 mi
- 17S 21E 12BCC 01Nitrate · 4.0 mi
- 18S 21E 13BAA 01Nitrate · 5.2 mi
- OSAWATOMIE, CITY OFUnderground Storage Tanks · 5.8 mi
- BURKDOLL BROTHERS INCCAFO · 6.5 mi
- 17S 20E 04ABC 01Nitrate · 6.7 mi
- 18S 20E 08AAB 01Nitrate · 6.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rantoul'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 Rantoul.
Total Sites
100
within ~10 miles of Rantoul
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Rantoul
Severity Distribution
within ~10 miles of Rantoul
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rantoul, PFAS runs higher than the national average — 3 sites within ~10 miles of Rantoul. 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 Rantoul
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 Rantoul average
Your land is one point inside Rantoul
Everything above resolves to Rantoul as a whole — one PHZM band and one 28°F frost record, read across 94 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 Rantoul Average
Rantoul Average
- ●USDA Zones 6b, averaged across Rantoul
- ●One soil character for all of Rantoul
- ●Frost dates read at Rantoul's scale: Mar 31 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Rantoul's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rantoul
Pull a site-specific report for your exact address in Rantoul, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rantoul averages can't show:
We read public map data around Rantoul — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rantoul average
How we know this about Rantoul
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 Rantoul’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 Rantoul
When does frost risk typically end in Rantoul?
The last hard freeze (28°F) in Rantoul typically lands around Mar 31, 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 21.
When is the first frost in Rantoul?
The first hard freeze (28°F) in Rantoul typically arrives around Nov 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 22, so the watching starts about Oct 6 — about 219 days after the spring freeze cleared.
How long is the growing season in Rantoul?
Measured between 28°F hard freezes, Rantoul sees about 219 frost-free days — roughly Mar 31 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 22, about 184 days.
Is the soil safe to grow vegetables in Rantoul?
The federal record around Rantoul is a meaningful one — 100 documented sites, mostly Underground Storage Tanks entries (42), the nearest Underground Storage Tanks record about 0.1 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 Rantoul?
From about Oct 6 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 5 (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 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rantoul's scale — its 6b band and its 219-day season. Your yard writes its own version of Rantoul'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 Rantoul’s own scale
7 of the readings below were taken at Rantoul's own scale — its own ~219-day season between 28°F freezes, the 94 acres it covers and 100 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Rantoul's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Rantoul's own 28°F hard-freeze dates, about Mar 31 and Nov 5 and the ~219-day span between themNOAA 1991–2020 Climate Normals
- 100 documented contamination sites on the federal record near Rantoul, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Rantoul's boundary and the 94 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~219-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rantoul's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Rantoul 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 Rantoul's 94 acres read through its county's SSURGO summaryfrom Franklin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Franklin County
- The growing challenges every Kansas grower plans around — written at state scale, so they stay on the state guidefrom Kansas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Franklin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rantoul's 94 acreswhy one lot differs from the next →
- Which side of Rantoul you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 94 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Rantoul-wide figureread your own land →
More in Kansas
Wider growing context
What grows across KansasRantoul sits outside our named growing regions, so Kansas as a whole is its closest context here.
Nearby growing guides