La Plata, Missouri, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in La Plata, 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 La Plata 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 La Plata — soil, climate, flood, and parcel records. How we handle your address.
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La Plata — the short answer
La Plata, Missouri: USDA zone 6a, about 209 days between hard freezes, across 1K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~209
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 6a is La Plata's average, not your lot's — a low corner or a tree line moves it. Against La Plata's 209-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in La Plata
Each reading below is measured for La Plata itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLa Plata runs about 209 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
MeasuredLa Plata sits in USDA hardiness zone 6a.
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 La Plata is in
La Plata sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at La Plata's own centroid rather than borrowed from Macon County.
What Grows in La Plata
Every plant below cleared La Plata's own zone 6a and its 209-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in La Plata?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — 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.
What's on the federal record near La Plata
Closest first, within ~10 miles of La Plata. Listing isn't leaking, and distance isn't exposure.
- COOP OIL & GASUnderground Storage Tanks · 700 ft
- WEST SIDE GUN SHOPUnderground Storage Tanks · 800 ft
- JONES STANDARD SERVICEUnderground Storage Tanks · 1100 ft
- LAPLATA OIL COMPANYUnderground Storage Tanks · 1100 ft
- CROP PRODUCTION SERVICES, INCUnderground Storage Tanks · 0.6 mi
- CASEYS GENERAL STORE #2374Underground Storage Tanks · 0.6 mi
- AMOCO PIPELINE COMPANYUnderground Storage Tanks · 0.8 mi
- BP PIPELINES AKA AMOCO PIPELINE COMPANYBrownfields · 0.8 mi
- KIRKSVILLE MUNICIPAL AIRPORTUnderground Storage Tanks · 5.4 mi
- T59N R14W 10DCA1Nitrate · 6.9 mi
- SOUTHWESTERN BELLUnderground Storage Tanks · 7.3 mi
- ATLANTA MAINT LOTUnderground Storage Tanks · 7.9 mi
5 more sites are on the record inside the same radius. See them on the map
Measured from La Plata'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 La Plata.
Total Sites
19
within ~10 miles of La Plata
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of La Plata
Severity Distribution
within ~10 miles of La Plata
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Large animal operations push nitrates and bacteria downstream. Below one, test your water.
Check your specific parcel in La Plata
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 La Plata average
Your land is one point inside La Plata
Everything above resolves to La Plata as a whole — one PHZM band and one 28°F frost record, read across 1K 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 La Plata Average
La Plata Average
- ●USDA Zones 6a, averaged across La Plata
- ●One soil character for all of La Plata
- ●Frost dates read at La Plata's scale: Apr 3 to Oct 29
YOUR Parcel
- ✓Your exact zone, not La Plata's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in La Plata
Pull a site-specific report for your exact address in La Plata, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that La Plata averages can't show:
We read public map data around La Plata — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the La Plata average
How we know this about La Plata
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 La Plata’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 La Plata
When does frost risk typically end in La Plata?
The last hard freeze (28°F) in La Plata typically lands around Apr 3, 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 24.
When is the first frost in La Plata?
The first hard freeze (28°F) in La Plata typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 209 days after the spring freeze cleared.
How long is the growing season in La Plata?
Measured between 28°F hard freezes, La Plata sees about 209 frost-free days — roughly Apr 3 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 24 to Oct 15, about 174 days.
Is the soil safe to grow vegetables in La Plata?
The federal record around La Plata is light — 19 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (11), the nearest Underground Storage Tanks record about 0.1 miles 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 La Plata?
From about Sep 29 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 Oct 29 (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 Oct 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at La Plata's scale — its 6a band and its 209-day season. Your yard writes its own version of La Plata'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 La Plata’s own scale
6 of the readings below were taken at La Plata's own scale — its own ~209-day season between 28°F freezes, the 1,016 acres it covers and 19 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- La Plata's own USDA hardiness band, zones 6aUSDA PHZM 2023
- La Plata's own 28°F hard-freeze dates, about Apr 3 and Oct 29 and the ~209-day span between themNOAA 1991–2020 Climate Normals
- 19 documented contamination sites on the federal record near La Plata, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- La Plata's boundary and the 1,016 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~209-day seasonGrowable Ground crop-matching engine
- The ecoregion at La Plata's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so La Plata's 1,016 acres read through its county's SSURGO summaryfrom Macon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Macon 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 Macon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among La Plata's 1,016 acreswhy one lot differs from the next →
- Which side of La Plata you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,016 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 La Plata-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriLa Plata sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides