Oklaunion, Texas, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Oklaunion, 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 Oklaunion 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 Oklaunion — soil, climate, flood, and parcel records. How we handle your address.
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Oklaunion — the short answer
Oklaunion, Texas: USDA zone 8a, about 248 days between hard freezes, across 287 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~248
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 287 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 8a is Oklaunion's average, not your lot's — a low corner or a tree line moves it. Against Oklaunion's 248-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Oklaunion
Each reading below is measured for Oklaunion itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredOklaunion runs about 248 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
MeasuredOklaunion sits in USDA hardiness zone 8a.
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 Oklaunion is in
Oklaunion sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Oklaunion's own centroid rather than borrowed from Wilbarger County.
What Grows in Oklaunion
Every plant below cleared Oklaunion's own zone 8a and its 248-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Oklaunion?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 17 — 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's on the federal record near Oklaunion
Closest first, within ~10 miles of Oklaunion. Listing isn't leaking, and distance isn't exposure.
- AMERICAN ELECTRIC POWER OKLAUNION PLANTToxics Release Inventory · 3.7 mi
- AMERICAN ELECTRIC POWER OKLAUNION PLANTBrownfields · 3.7 mi
- AEP-PSD OKLAUNION POWER STATIONUnderground Storage Tanks · 3.9 mi
- VERNON FEEDERS, LLCCAFO · 5.7 mi
- SANTA ROSAUnderground Storage Tanks · 6.5 mi
- AMERADA HESS AREA OFFICEUnderground Storage Tanks · 6.5 mi
- PAYMASTER SEEDSUnderground Storage Tanks · 6.5 mi
- WILBARGER COUNTY AIRPORTUnderground Storage Tanks · 6.5 mi
- BROWNLEEUnderground Storage Tanks · 6.5 mi
- VERNTEX WELL SERVICEUnderground Storage Tanks · 6.5 mi
- NORTHSIDE ISDUnderground Storage Tanks · 6.5 mi
- VERNON AREA OFFICEUnderground Storage Tanks · 6.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Oklaunion'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 Oklaunion.
Total Sites
96
within ~10 miles of Oklaunion
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Oklaunion
Severity Distribution
within ~10 miles of Oklaunion
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Oklaunion, Underground Storage Tanks runs higher than the national average — 81 sites within ~10 miles of Oklaunion. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Oklaunion
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 Oklaunion average
Your land is one point inside Oklaunion
Everything above resolves to Oklaunion as a whole — one PHZM band and one 28°F frost record, read across 287 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 Oklaunion Average
Oklaunion Average
- ●USDA Zones 8a, averaged across Oklaunion
- ●One soil character for all of Oklaunion
- ●Frost dates read at Oklaunion's scale: Mar 14 to Nov 17
YOUR Parcel
- ✓Your exact zone, not Oklaunion's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Oklaunion
Pull a site-specific report for your exact address in Oklaunion, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Oklaunion averages can't show:
We read public map data around Oklaunion — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oklaunion average
How we know this about Oklaunion
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 Oklaunion’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 Oklaunion
When does frost risk typically end in Oklaunion?
The last hard freeze (28°F) in Oklaunion typically lands around Mar 14, 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 4.
When is the first frost in Oklaunion?
The first hard freeze (28°F) in Oklaunion typically arrives around Nov 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 3, so the watching starts about Oct 18 — about 248 days after the spring freeze cleared.
How long is the growing season in Oklaunion?
Measured between 28°F hard freezes, Oklaunion sees about 248 frost-free days — roughly Mar 14 through Nov 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 4 to Nov 3, about 213 days.
Is the soil safe to grow vegetables in Oklaunion?
The federal record around Oklaunion shows 96 documented sites, mostly Underground Storage Tanks entries (81), the nearest Toxics Release Inventory record about 3.7 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 Oklaunion?
From about Oct 18 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 17 (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 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Oklaunion's scale — its 8a band and its 248-day season. Your yard writes its own version of Oklaunion'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 Oklaunion’s own scale
6 of the readings below were taken at Oklaunion's own scale — its own ~248-day season between 28°F freezes, the 287 acres it covers and 96 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Oklaunion's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Oklaunion's own 28°F hard-freeze dates, about Mar 14 and Nov 17 and the ~248-day span between themNOAA 1991–2020 Climate Normals
- 96 documented contamination sites on the federal record near Oklaunion, the closest Toxics Release Inventory record about 3.7 miles out from the town centreFederal environmental registers
- Oklaunion's boundary and the 287 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~248-day seasonGrowable Ground crop-matching engine
- The ecoregion at Oklaunion's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Oklaunion's 287 acres read through its county's SSURGO summaryfrom Wilbarger County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Wilbarger County
- The growing challenges every Texas grower plans around — written at state scale, so they stay on the state guidefrom Texas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Wilbarger County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Oklaunion's 287 acreswhy one lot differs from the next →
- Which side of Oklaunion you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 287 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory record about 3.7 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 Oklaunion-wide figureread your own land →
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