Oakville, Missouri, sits in USDA hardiness zone 7a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, hazelnut, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Oakville, 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 Oakville 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 Oakville — soil, climate, flood, and parcel records. How we handle your address.
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Oakville — the short answer
Oakville, Missouri: USDA zone 7a, about 234 days between hard freezes, across 10K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~234
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 10K 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 7a is Oakville's average, not your lot's — a low corner or a tree line moves it. Against Oakville's 234-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Oakville
Each reading below is measured for Oakville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredOakville runs about 234 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
MeasuredOakville sits in USDA hardiness zone 7a.
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 Oakville is in
Oakville sits in the Ozark Highlands — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Oakville's own centroid, and it is not what its county reads: St. Louis County is mostly Interior River Valleys and Hills. The wider page above you is answering a different question about different ground.
What Grows in Oakville
Every plant below cleared Oakville's own zone 7a and its 234-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Oakville?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 22; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 22 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 11 — 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 Oakville
Survey cells within 31 miles of Oakville checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 254 miles off. What to watch for.
What's on the federal record near Oakville
Closest first, within ~10 miles of Oakville. Listing isn't leaking, and distance isn't exposure.
- T43N R06E 22AAC1Nitrate · 0.6 mi
- WALLIS PETROLEUM #511Underground Storage Tanks · 0.7 mi
- RONALD J & KATHLEEN A JOHNSONUnderground Storage Tanks · 0.8 mi
- FRED WEBER INC - SOUTH QUARRYUnderground Storage Tanks · 0.8 mi
- WALGREENS #5667Brownfields · 0.8 mi
- MEHLVILLE FIRE STATTION #6Underground Storage Tanks · 0.8 mi
- NEW FRONTIER MATERIALS OPERATIONS ALPHA LLC SOUTH ASPHALT BATCHBrownfields · 1.0 mi
- OAKVILLE BP INCUnderground Storage Tanks · 1.4 mi
- DOBBS AUTO TIRE SERVICE INCUnderground Storage Tanks · 1.5 mi
- T43N R06E 13DDC1Nitrate · 1.5 mi
- RUDD EQUIPMENT COBrownfields · 1.6 mi
- JOSEPH R. STOCHL/JAMES E. STOCHLUnderground Storage Tanks · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Oakville'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 Oakville.
Sources Checked
within ~10 miles of Oakville
Severity Distribution
within ~10 miles of Oakville
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Oakville
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 Oakville average
Your land is one point inside Oakville
Everything above resolves to Oakville as a whole — one PHZM band and one 28°F frost record, read across 10K 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 town 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 Oakville Average
Oakville Average
- ●USDA Zones 7a, averaged across Oakville
- ●One soil character for all of Oakville
- ●Frost dates read at Oakville's scale: Mar 22 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Oakville's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Oakville
Pull a site-specific report for your exact address in Oakville, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Oakville averages can't show:
We read public map data around Oakville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oakville average
How we know this about Oakville
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Oakville’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 town grain anywhere on this page — there is no town-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 Oakville
When does frost risk typically end in Oakville?
The last hard freeze (28°F) in Oakville typically lands around Mar 22, 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 12.
When is the first frost in Oakville?
The first hard freeze (28°F) in Oakville typically arrives around Nov 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 28, so the watching starts about Oct 12 — about 234 days after the spring freeze cleared.
How long is the growing season in Oakville?
Measured between 28°F hard freezes, Oakville sees about 234 frost-free days — roughly Mar 22 through Nov 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 12 to Oct 28, about 199 days.
Is the soil safe to grow vegetables in Oakville?
The federal record around Oakville is a meaningful one — 1,320 documented sites, mostly Underground Storage Tanks entries (703), the nearest Nitrate record about 0.6 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 Oakville?
From about Oct 12 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Oakville's scale — its 7a band and its 234-day season. Your yard writes its own version of Oakville'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 Oakville’s own scale
7 of the readings below were taken at Oakville's own scale — its own ~234-day season between 28°F freezes, the 10,162 acres it covers and 1,320 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Oakville's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Oakville's own 28°F hard-freeze dates, about Mar 22 and Nov 11 and the ~234-day span between themNOAA 1991–2020 Climate Normals
- 1,320 documented contamination sites on the federal record near Oakville, the closest Nitrate record about 0.6 miles out from the town centreFederal environmental registers
- Oakville's boundary and the 10,162 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~234-day seasonGrowable Ground crop-matching engine
- Oakville sits in the Ozark Highlands — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Oakville checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Oakville's 10,162 acres read through its county's SSURGO summaryfrom St. Louis County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Louis 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 St. Louis County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Oakville's 10,162 acreswhy one lot differs from the next →
- Which side of Oakville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 10,162 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.6 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 Oakville-wide figureread your own land →
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