Henry County, in Missouri, sits in USDA hardiness zone 6b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Expect cabbage, hazelnut, lavender, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Henry County holds more than one microclimate.
Soils and elevations shift across Henry 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 Henry County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Henry County — the short answer
Henry County, Missouri: USDA zone 6b, about 216 days between hard freezes, across 446K acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 1
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 3
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~216
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 446K 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 Henry County's average, not your lot's — a low corner or a tree line moves it. Against Henry County's 216-day season, see what your own ground reads.
Heat in Henry County
Across a year, Henry County accumulates about 3,887 growing degree days above 50°F, about 134 more than the middle Missouri county — ahead of 82 of Missouri’s 115 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 Henry County
Across Henry County, the ground is predominantly Mollisols, where Deepwater, Hartwell, and Barco are the most extensive named soil series. The soil is generally well drained with a silt loam surface. Topsoil pH runs about 5.8–6.3, moderately acidic. Rainfall drains through hydrologic group C soils.
Soil order
Mollisols
Drainage
Well drained
Prime farmland
28%
Hydric soils
8%
Soil still varies lot by lot — soil types explained.
How the ground varies across Henry County
The USDA soil survey maps 34% of Henry County as well drained — but another 66% drains differently: 31% moderately well drained, 22% somewhat poorly drained.
Deepwater is the most extensive named soil at 22% of mapped acres, then Hartwell (22%) and Barco (10%).
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 Henry County
Each reading below is measured for Henry 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 Henry County are well drained, in hydrologic group C — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Henry County runs about pH 5.8–6.3, 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
MeasuredHenry County runs about 216 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
MeasuredHenry 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 Henry County is in
Henry County sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. One consistent ecological setting across the whole county.
What Grows in Henry County
We scored all 1,086 plants against Henry County's own USDA zone 6b and its own 216-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 Missouri profile.
Is it too late to plant in Henry County?
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 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 3 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What gets applied to farmland in Henry County
USGS estimates 91,539 lb of Glyphosate on Henry County farmland in 2019, its largest by weight, ahead of Metolachlor & Metolachlor-s (39,832 lb) and Atrazine (31,391 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 Henry County — and how to grow with it.
We checked the federal record across Henry County — 183 documented sites across 6 of the 9 source types we track.
The most significant on record: 8 Toxics Release Inventory facilities. Active industrial facilities reporting chemical releases to air, water, and land.
The federal record across Henry County is a modest one — a typical footprint for a growing area. Nothing here calls for alarm; it's worth knowing which recorded sites sit closest to where you grow, and each one on the map carries its type and location. If one turns out to be a near neighbor, a one-time soil test settles the question.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Henry County
Closest first, across Henry County. Listing isn't leaking, and distance isn't exposure.
- CLINTON ENTERPRISES, INCUnderground Storage Tanks · 1400 ft
- BREAK TIME #3014Underground Storage Tanks · 1400 ft
- PARKS CABINET SHOP INCBrownfields · 1700 ft
- TC TRANSCONTINENTAL PACKAGING CAPRI 2Toxics Release Inventory · 2200 ft
- TC TRANSCONTINENTAL PACKAGING CAPRI 2Brownfields · 2200 ft
- ZENITH SPECIALTIESBrownfields · 0.7 mi
- HENRY COUNTY SUPPLYUnderground Storage Tanks · 1.0 mi
- READI MOTORS, INCUnderground Storage Tanks · 1.0 mi
- EVERYDAY STORE #1020Underground Storage Tanks · 1.1 mi
- BREAK TIME CONVENIENCE STORE #3015Underground Storage Tanks · 1.1 mi
- GOLDEN VALLEY FORD TRACTORBrownfields · 1.1 mi
- WHITE OAK STATION #41Underground Storage Tanks · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Henry 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 Henry County.
Total Sites
183
across Henry County
Risk Level
Moderate
Highest-severity
8 Toxics Release Inventory facilities
Sources Checked
across Henry County
Severity Distribution
across Henry County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Henry County, CAFO runs higher than the national average — 6 sites across Henry County. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in Henry 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 Henry County average
Your land is one point inside Henry County
Everything above resolves to Henry County as a whole — one PHZM band and one county frost record, read across 446K 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 Henry County Average
Henry County Average
- ●USDA Zones 6b, averaged across Henry County
- ●One soil character for all of Henry County
- ●Frost dates read at Henry County's scale: Apr 1 to Nov 3
YOUR Parcel
- ✓Your exact zone, not Henry County's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Henry County
Pull a site-specific report for your exact address in Henry County, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Henry County averages can't show:
We read public map data around Henry County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Henry County average
How we know this about Henry 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 Henry County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Henry County
When does frost risk typically end in Henry County?
The last hard freeze (28°F) in Henry County typically lands around Apr 1, 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 22.
How long is the growing season in Henry County?
Measured between 28°F hard freezes, Henry County sees about 216 frost-free days — roughly Apr 1 through Nov 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 20, about 181 days.
Is the soil safe to grow vegetables in Henry County?
The federal record around Henry County shows 183 documented sites, mostly Underground Storage Tanks entries (100), the nearest Underground Storage Tanks record about 0.3 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
Everything above is measured at Henry County's scale — its 6b band and its 216-day season. Your yard writes its own version of Henry 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 Missouri's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Henry County’s own scale
8 of the readings below were taken at Henry County's own scale — its own ~216-day span between 28°F freezes, the 3 most extensive soil series mapped here and 183 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Henry County's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Henry County's own 28°F hard-freeze dates and its ~216-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Henry CountyUSDA NRCS SSURGO
- 183 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.3 miles outFederal environmental registers
- Henry County's boundary and the 446,039 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~216-day seasonGrowable Ground crop-matching engine
- Henry County sitting wholly inside the Central Irregular PlainsUS EPA Level III Ecoregions
- Which agricultural compounds go onto Henry County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Missouri grower plans around — written at state scale, so they stay on the state guidefrom Missouri
What this page can’t tell you
- How the season shifts across Henry County — the ~216 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 Henry County's 446,039 acreswhy one lot differs from the next →
- Which of those 183 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 Henry Countyread your own land →