Madison, Kansas, sits in USDA hardiness zone 6b — 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 Madison, 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 Madison 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 Madison — soil, climate, flood, and parcel records. How we handle your address.
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Madison — the short answer
Madison, Kansas: USDA zone 6b, about 220 days between hard freezes, across 374 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 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 374 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 Madison's average, not your lot's — a low corner or a tree line moves it. Against Madison's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Madison
Each reading below is measured for Madison itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMadison runs about 220 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
MeasuredMadison 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 Madison is in
Madison sits in the Flint Hills — EPA Level III, inside the wider Great Plains. That is read at Madison's own centroid rather than borrowed from Greenwood County.
What Grows in Madison
Every plant below cleared Madison's own zone 6b and its 220-day season. Each card opens that plant's Kansas profile. How we score.
Is it too late to plant in Madison?
Rarely: the season closes in stages, not all at once, and each stage has its crops. 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 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 Madison
Closest first, within ~10 miles of Madison. Listing isn't leaking, and distance isn't exposure.
- HARRISON BODY SHOPBrownfields · 500 ft
- CASEY'S GENERAL STORES - #1342Underground Storage Tanks · 950 ft
- MADISON T. V. HARDWAREUnderground Storage Tanks · 1200 ft
- M & L SERVICE CENTERUnderground Storage Tanks · 1400 ft
- M & L SERVICE CENTERBrownfields · 1500 ft
- GOSCO INCBrownfields · 1500 ft
- REX WILLIAMS AUTO SERVICEUnderground Storage Tanks · 1600 ft
- BRINKMAN CHEVROLET OLDS INCUnderground Storage Tanks · 1600 ft
- JOHNS GARAGEUnderground Storage Tanks · 1700 ft
- WAGNERS AUTOMOTIVE GENERAL SVCBrownfields · 1800 ft
- JOHNS GARAGEBrownfields · 1800 ft
- WILLIAMS ELEC INCBrownfields · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Madison'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 Madison.
Sources Checked
within ~10 miles of Madison
Severity Distribution
within ~10 miles of Madison
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Madison, Nitrate runs higher than the national average — 12 sites within ~10 miles of Madison. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Madison
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 Madison average
Your land is one point inside Madison
Everything above resolves to Madison as a whole — one PHZM band and one 28°F frost record, read across 374 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 Madison Average
Madison Average
- ●USDA Zones 6b, averaged across Madison
- ●One soil character for all of Madison
- ●Frost dates read at Madison's scale: Mar 31 to Nov 6
YOUR Parcel
- ✓Your exact zone, not Madison's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Madison
Pull a site-specific report for your exact address in Madison, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Madison averages can't show:
We read public map data around Madison — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Madison average
How we know this about Madison
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 Madison’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 Madison
When does frost risk typically end in Madison?
The last hard freeze (28°F) in Madison 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 Madison?
The first hard freeze (28°F) in Madison 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 220 days after the spring freeze cleared.
How long is the growing season in Madison?
Measured between 28°F hard freezes, Madison sees about 220 frost-free days — roughly Mar 31 through Nov 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 23, about 185 days.
Is the soil safe to grow vegetables in Madison?
The federal record around Madison is light — 34 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (14), the nearest Brownfields 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 Madison?
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 Madison's scale — its 6b band and its 220-day season. Your yard writes its own version of Madison'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 Madison’s own scale
6 of the readings below were taken at Madison's own scale — its own ~220-day season between 28°F freezes, the 374 acres it covers and 34 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Madison's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Madison's own 28°F hard-freeze dates, about Mar 31 and Nov 6 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 34 documented contamination sites on the federal record near Madison, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Madison's boundary and the 374 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~220-day seasonGrowable Ground crop-matching engine
- The ecoregion at Madison's own centroid, the Flint HillsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Madison's 374 acres read through its county's SSURGO summaryfrom Greenwood County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Greenwood 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 Greenwood County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Madison's 374 acreswhy one lot differs from the next →
- Which side of Madison you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 374 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Madison-wide figureread your own land →
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