Harrisonville, Missouri, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, hazelnut, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Harrisonville, 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 Harrisonville 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 Harrisonville — soil, climate, flood, and parcel records. How we handle your address.
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Harrisonville — the short answer
Harrisonville, Missouri: USDA zone 6b, about 226 days between hard freezes, across 7K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~226
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 7K 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 Harrisonville's average, not your lot's — a low corner or a tree line moves it. Against Harrisonville's 226-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Harrisonville
Each reading below is measured for Harrisonville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHarrisonville runs about 226 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
MeasuredHarrisonville 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 Harrisonville is in
Harrisonville sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Harrisonville's own centroid rather than borrowed from Cass County.
What Grows in Harrisonville
Every plant below cleared Harrisonville's own zone 6b and its 226-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Harrisonville?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Harrisonville
Closest first, within ~10 miles of Harrisonville. Listing isn't leaking, and distance isn't exposure.
- KEN'S KITCHENUnderground Storage Tanks · 1100 ft
- HARRISONVILLE MAINT FACILITYUnderground Storage Tanks · 1800 ft
- HARRISONVILLE CENTRAL OFFICEUnderground Storage Tanks · 1800 ft
- HARRISONVILLE FIRE / EMERGENCY STATIONUnderground Storage Tanks · 1800 ft
- TEXACO STATIONUnderground Storage Tanks · 1900 ft
- HARRISONVILLE MAINT LOTUnderground Storage Tanks · 2000 ft
- HARRISONVILLE AUTO PARTSBrownfields · 2100 ft
- V & L CONOCOUnderground Storage Tanks · 2100 ft
- CASS COUNTY CLEANERS INC-HARRISONVILLEBrownfields · 2200 ft
- HARVEY'S - S.C. INCUnderground Storage Tanks · 2200 ft
- RAMSEY'S FEED & FARM SUPPLYUnderground Storage Tanks · 2200 ft
- SOUTHWESTERN BELLUnderground Storage Tanks · 2300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Harrisonville'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 Harrisonville.
Total Sites
126
within ~10 miles of Harrisonville
Risk Level
Moderate
Highest-severity
11 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Harrisonville
Severity Distribution
within ~10 miles of Harrisonville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Harrisonville, two things run higher than the national average within ~10 miles of Harrisonville — PFAS (3 sites) and Toxics Release Inventory (11 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Harrisonville
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 Harrisonville average
Your land is one point inside Harrisonville
Everything above resolves to Harrisonville as a whole — one PHZM band and one 28°F frost record, read across 7K 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 Harrisonville Average
Harrisonville Average
- ●USDA Zones 6b, averaged across Harrisonville
- ●One soil character for all of Harrisonville
- ●Frost dates read at Harrisonville's scale: Mar 28 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Harrisonville's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Harrisonville
Pull a site-specific report for your exact address in Harrisonville, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Harrisonville averages can't show:
We read public map data around Harrisonville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Harrisonville average
How we know this about Harrisonville
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 Harrisonville’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 Harrisonville
When does frost risk typically end in Harrisonville?
The last hard freeze (28°F) in Harrisonville typically lands around Mar 28, 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 18.
When is the first frost in Harrisonville?
The first hard freeze (28°F) in Harrisonville typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 226 days after the spring freeze cleared.
How long is the growing season in Harrisonville?
Measured between 28°F hard freezes, Harrisonville sees about 226 frost-free days — roughly Mar 28 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 18 to Oct 26, about 191 days.
Is the soil safe to grow vegetables in Harrisonville?
The federal record around Harrisonville shows 126 documented sites, mostly Underground Storage Tanks entries (66), the nearest Underground Storage Tanks record about 0.2 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.
How do I protect my plants from frost in Harrisonville?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Harrisonville's scale — its 6b band and its 226-day season. Your yard writes its own version of Harrisonville'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 Harrisonville’s own scale
6 of the readings below were taken at Harrisonville's own scale — its own ~226-day season between 28°F freezes, the 7,156 acres it covers and 126 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Harrisonville's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Harrisonville's own 28°F hard-freeze dates, about Mar 28 and Nov 9 and the ~226-day span between themNOAA 1991–2020 Climate Normals
- 126 documented contamination sites on the federal record near Harrisonville, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Harrisonville's boundary and the 7,156 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~226-day seasonGrowable Ground crop-matching engine
- The ecoregion at Harrisonville's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Harrisonville's 7,156 acres read through its county's SSURGO summaryfrom Cass County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cass County
- The growing challenges every Missouri grower plans around — written at state scale, so they stay on the state guidefrom Missouri
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Cass County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Harrisonville's 7,156 acreswhy one lot differs from the next →
- Which side of Harrisonville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 7,156 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 Harrisonville-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriHarrisonville sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides