Clarksville, 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.
Reliable performers under these conditions include cabbage, hazelnut, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Clarksville, 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 Clarksville 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 Clarksville — soil, climate, flood, and parcel records. How we handle your address.
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Clarksville — the short answer
Clarksville, Missouri: USDA zone 6b, about 228 days between hard freezes, across 372 acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 26
- 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
- ~228
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 372 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 Clarksville's average, not your lot's — a low corner or a tree line moves it. Against Clarksville's 228-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Clarksville
Each reading below is measured for Clarksville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredClarksville runs about 228 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
MeasuredClarksville 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 Clarksville is in
Clarksville sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Clarksville's own centroid rather than borrowed from Pike County.
What Grows in Clarksville
Every plant below cleared Clarksville's own zone 6b and its 228-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Clarksville?
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 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 26 (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 Clarksville
Closest first, within ~10 miles of Clarksville. Listing isn't leaking, and distance isn't exposure.
- BOYDS VILLAGE MARKET LLCUnderground Storage Tanks · 750 ft
- T53N R01E 16BAB1Nitrate · 1000 ft
- USACE LOCK & DAM 24Brownfields · 1200 ft
- T53N R01E 16BDA1Nitrate · 1200 ft
- US ARMY CORPS OF ENG LOCK & DAMUnderground Storage Tanks · 1800 ft
- CLARKSVILLE 66Underground Storage Tanks · 0.5 mi
- DUNDEE CEMENT COMPANYUnderground Storage Tanks · 2.2 mi
- SAFETY-KLEEN CORPToxics Release Inventory · 2.2 mi
- HOLCIM US INC - CLARKSVILLE PLANTBrownfields · 2.2 mi
- HOLCIM US INC - CLARKSVILLE PLANTToxics Release Inventory · 2.2 mi
- LOWELL CAPPSUnderground Storage Tanks · 3.6 mi
- Richter FertilizerUnderground Storage Tanks · 4.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Clarksville'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 Clarksville.
Total Sites
68
within ~10 miles of Clarksville
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Clarksville
Severity Distribution
within ~10 miles of Clarksville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Clarksville, two things run higher than the national average within ~10 miles of Clarksville — Toxics Release Inventory (8 sites) and Underground Storage Tanks (42 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Clarksville
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 Clarksville average
Your land is one point inside Clarksville
Everything above resolves to Clarksville as a whole — one PHZM band and one 28°F frost record, read across 372 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 Clarksville Average
Clarksville Average
- ●USDA Zones 6b, averaged across Clarksville
- ●One soil character for all of Clarksville
- ●Frost dates read at Clarksville's scale: Mar 26 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Clarksville's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Clarksville
Pull a site-specific report for your exact address in Clarksville, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Clarksville averages can't show:
We read public map data around Clarksville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Clarksville average
How we know this about Clarksville
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 Clarksville’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 Clarksville
When does frost risk typically end in Clarksville?
The last hard freeze (28°F) in Clarksville typically lands around Mar 26, 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 16.
When is the first frost in Clarksville?
The first hard freeze (28°F) in Clarksville 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 228 days after the spring freeze cleared.
How long is the growing season in Clarksville?
Measured between 28°F hard freezes, Clarksville sees about 228 frost-free days — roughly Mar 26 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 16 to Oct 26, about 193 days.
Is the soil safe to grow vegetables in Clarksville?
The federal record around Clarksville is a meaningful one — 68 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 Clarksville?
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 Clarksville's scale — its 6b band and its 228-day season. Your yard writes its own version of Clarksville'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 Clarksville’s own scale
6 of the readings below were taken at Clarksville's own scale — its own ~228-day season between 28°F freezes, the 372 acres it covers and 68 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Clarksville's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Clarksville's own 28°F hard-freeze dates, about Mar 26 and Nov 9 and the ~228-day span between themNOAA 1991–2020 Climate Normals
- 68 documented contamination sites on the federal record near Clarksville, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Clarksville's boundary and the 372 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~228-day seasonGrowable Ground crop-matching engine
- The ecoregion at Clarksville's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Clarksville's 372 acres read through its county's SSURGO summaryfrom Pike County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pike 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 Pike County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Clarksville's 372 acreswhy one lot differs from the next →
- Which side of Clarksville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 372 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 Clarksville-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriClarksville sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides