Wyandotte County, in Kansas, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Wyandotte County lies within Greater Kansas City Metro (Kansas Side) — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Wyandotte County holds more than one microclimate.
Soils and elevations shift across Wyandotte County, so your frost dates and drainage aren't the county average. 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 Wyandotte County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Wyandotte County — the short answer
Wyandotte County, Kansas: USDA zone 6b, about 223 days between hard freezes, across 97K acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 30
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 8
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~223
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 97K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Wyandotte County's average, not your lot's — a low corner or a tree line moves it. Against Wyandotte County's 223-day season, see what your own ground reads.
Heat in Wyandotte County
Across a year, Wyandotte County accumulates about 3,833 growing degree days above 50°F, right at the Kansas middle — ahead of 52 of Kansas’s 105 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Wyandotte County
Across Wyandotte County, the ground is predominantly Alfisols, where Knox, Ladoga, and Sharpsburg are the most extensive named soil series. The soil is generally moderately well drained with a silt loam surface. Topsoil pH runs about 6.2–6.7, slightly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Alfisols
Drainage
Moderately well drained
Prime farmland
32%
Hydric soils
1%
Soil still varies lot by lot — soil types explained.
How the ground varies across Wyandotte County
The USDA soil survey maps 42% of Wyandotte County as moderately well drained — but another 51% drains differently: 41% well drained, 7% somewhat poorly drained.
Knox is the most extensive named soil at 25% of mapped acres, then Ladoga (15%) and Sharpsburg (8%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Wyandotte County
Each reading below is measured for Wyandotte County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Wyandotte County are moderately well drained, in hydrologic group B — roughly the middle of the drainage range.
This is close to the middle most vegetables prefer: it holds enough water to carry a crop between rains without staying waterlogged. The catch is that a wet spring or a low corner can still tip it soggy.
Plant on the site as-is for most crops, but keep the lowest, slowest-draining beds for moisture-tolerant plantings.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Wyandotte County runs about pH 6.2–6.7, close to neutral.
This is the range most vegetables prefer — one correction you probably do not have to make, which is genuinely good news for a new bed.
Keep it there with compost rather than lime or sulfur, and only amend if your own soil test says otherwise.
USDA NRCS SSURGO
Season length
MeasuredWyandotte County runs about 223 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
MeasuredWyandotte County 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 Wyandotte County is in
Wyandotte County spans 2 EPA Level III ecoregions — Central Irregular Plains (92%) and Western Corn Belt Plains (8%). Which one your land falls in changes what grows wild there and how the ground behaves, and a county-wide answer cannot tell you which.
What Grows in Wyandotte County
We scored all 1,086 plants against Wyandotte County's own USDA zone 6b and its own 223-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Kansas profile.
Is it too late to plant in Wyandotte County?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 8 — 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 Wyandotte County
- Japanese beetle2 documented records
- monarch butterfly185 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Wyandotte County
USGS estimates 8,920 lb of Glyphosate on Wyandotte County farmland in 2019, its largest by weight, ahead of Atrazine (5,777 lb) and Metolachlor & Metolachlor-s (4,000 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Wyandotte County — and how to grow with it.
We checked the federal record across Wyandotte County — 1,301 documented sites across 5 of the 9 source types we track.
The most significant on record: 9 Superfund sites (none NPL-listed). Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Wyandotte County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Wyandotte County
Closest first, across Wyandotte County. Listing isn't leaking, and distance isn't exposure.
- KMART #4215Brownfields · 400 ft
- KMART #4215Underground Storage Tanks · 500 ft
- GREGG TIRE CO.Brownfields · 500 ft
- SINCLAIR RETAILUnderground Storage Tanks · 550 ft
- TIRES PLUSBrownfields · 550 ft
- KANSAS CITY, POLICE DEPTUnderground Storage Tanks · 550 ft
- KANSAS CITY, FIRE STATION #19Underground Storage Tanks · 550 ft
- GOODYEAR TIRE CENTERUnderground Storage Tanks · 600 ft
- JIFFY LUBEUnderground Storage Tanks · 650 ft
- QUICK SERVICEUnderground Storage Tanks · 800 ft
- STATE AVE SHELLUnderground Storage Tanks · 1000 ft
- WALGREEN DRUG STORE #7550Brownfields · 1100 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Wyandotte County'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 Wyandotte County.
Total Sites
1,301
across Wyandotte County
Risk Level
Elevated
Highest-severity
9 Superfund sites (none NPL-listed)
Sources Checked
across Wyandotte County
Severity Distribution
across Wyandotte County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wyandotte County, Toxics Release Inventory runs higher than the national average — 87 sites across Wyandotte County. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Wyandotte County
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 Wyandotte County average
Your land is one point inside Wyandotte County
Everything above resolves to Wyandotte County as a whole — one PHZM band and one county frost record, read across 97K 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 county 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 county average.
Your Lot vs the Wyandotte County Average
Wyandotte County Average
- ●USDA Zones 6b, averaged across Wyandotte County
- ●One soil character for all of Wyandotte County
- ●Frost dates read at Wyandotte County's scale: Mar 30 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Wyandotte County's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Wyandotte County
Pull a site-specific report for your exact address in Wyandotte County, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wyandotte County averages can't show:
We read public map data around Wyandotte County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wyandotte County average
How we know this about Wyandotte County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Wyandotte County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Wyandotte County
When does frost risk typically end in Wyandotte County?
The last hard freeze (28°F) in Wyandotte County typically lands around Mar 30, 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 20.
How long is the growing season in Wyandotte County?
Measured between 28°F hard freezes, Wyandotte County sees about 223 frost-free days — roughly Mar 30 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 20 to Oct 25, about 188 days.
Is the soil safe to grow vegetables in Wyandotte County?
The federal record around Wyandotte County is a meaningful one — 1,301 documented sites, mostly Underground Storage Tanks entries (540), the nearest Brownfields record under a tenth of a mile 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.
Everything above is measured at Wyandotte County's scale — its 6b band and its 223-day season. Your yard writes its own version of Wyandotte County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Kansas's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Wyandotte County’s own scale
9 of the readings below were taken at Wyandotte County's own scale — its own ~223-day span between 28°F freezes, the 3 most extensive soil series mapped here and 1,301 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Wyandotte County's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Wyandotte County's own 28°F hard-freeze dates and its ~223-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Wyandotte CountyUSDA NRCS SSURGO
- 1,301 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Brownfields record under a tenth of a mile outFederal environmental registers
- Wyandotte County's boundary and the 97,048 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~223-day seasonGrowable Ground crop-matching engine
- The 2 ecoregions Wyandotte County spans, Central Irregular Plains the largestUS EPA Level III Ecoregions
- Open occurrence records documented in Wyandotte County for 2 tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Wyandotte County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Kansas grower plans around — written at state scale, so they stay on the state guidefrom Kansas
What this page can’t tell you
- How the season shifts across Wyandotte County — the ~223 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wyandotte County's 97,048 acreswhy one lot differs from the next →
- Which of those 1,301 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Wyandotte Countyread your own land →