Texas County, in Oklahoma, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Texas County lies within the Oklahoma Panhandle ("No Man's Land") — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Texas County holds more than one microclimate.
Soils and elevations shift across Texas County, so your frost dates and drainage aren't the county average. 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 Texas County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Texas County — the short answer
Texas County, Oklahoma: USDA zone 6b, about 204 days between hard freezes, across 1.3M acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~204
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 1.3M acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Texas County's average, not your lot's — a low corner or a tree line moves it. Against Texas County's 204-day season, see what your own ground reads.
Heat in Texas County
Across a year, Texas County accumulates about 3,950 growing degree days above 50°F, about 770 fewer than the middle Oklahoma county — ahead of 1 of Oklahoma’s 77 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Texas County
Across Texas County, the ground is predominantly Mollisols, where Gruver, Ulysses, and Dalhart are the most extensive named soil series. The soil is generally well drained with a clay loam surface. Topsoil pH runs about 7.2–7.8, slightly alkaline. Rainfall drains through hydrologic group B soils.
Soil order
Mollisols
Drainage
Well drained
Prime farmland
45%
Hydric soils
1%
Soil still varies lot by lot — soil types explained.
How the ground varies across Texas County
The USDA soil survey maps 96% of Texas County as well drained — but another 4% drains differently: 2% somewhat excessively drained, 1% poorly drained.
Gruver is the most extensive named soil at 28% of mapped acres, then Ulysses (14%) and Dalhart (11%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Texas County
Each reading below is measured for Texas County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Texas County are well drained, in hydrologic group B — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Texas County runs about pH 7.2–7.8, on the alkaline side.
Many vegetables cope, but acid-lovers like blueberries struggle, and iron and manganese lock up above about pH 7.5 — leaves yellow between the veins even in rich soil.
Elemental sulfur and generous organic matter lower pH slowly for the beds that need it; test first so you add only what the soil actually calls for.
USDA NRCS SSURGO
Season length
MeasuredTexas County runs about 204 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
MeasuredTexas County 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 Texas County is in
Texas County spans 2 EPA Level III ecoregions — High Plains (68%) and Southwestern Tablelands (32%). Which one your land falls in changes what grows wild there and how the ground behaves, and a county-wide answer cannot tell you which.
What Grows in Texas County
We scored all 1,086 plants against Texas County's own USDA zone 6b and its own 204-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Oklahoma profile.
Is it too late to plant in Texas County?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — 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 gets applied to farmland in Texas County
USGS estimates 326,508 lb of Glyphosate on Texas County farmland in 2019, its largest by weight, ahead of Atrazine (188,797 lb) and 2,4-d (121,852 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Texas County — and how to grow with it.
We checked the federal record across Texas County — 520 documented sites across 6 of the 9 source types we track.
The most significant on record: 9 Toxics Release Inventory facilities. Active industrial facilities reporting chemical releases to air, water, and land.
There's a meaningful federal record across Texas County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Texas County
Closest first, across Texas County. Listing isn't leaking, and distance isn't exposure.
- GUYMONPFAS · 0.7 mi
- City LandfillUnderground Storage Tanks · 2.1 mi
- SEABOARD FOODS GUYMON PORK PROCESSING PLANTBrownfields · 2.7 mi
- WALMART SUPERCENTER #1437Brownfields · 2.8 mi
- Quik 6 ExpressUnderground Storage Tanks · 2.9 mi
- TRACTOR SUPPLY # 1236Brownfields · 2.9 mi
- Pool Co.Underground Storage Tanks · 2.9 mi
- FAMILY DOLLAR #5786Brownfields · 3.0 mi
- Arnold Dirt Construction IncUnderground Storage Tanks · 3.0 mi
- HITCH ENTER* FIN SITE #30-#36CAFO · 3.0 mi
- HITCH ENTER* FIN SITE #27-#29CAFO · 3.0 mi
- HITCH ENTERPRISES - FINISH SITE #23-#26CAFO · 3.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Texas County'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 Texas County.
Total Sites
520
across Texas County
Risk Level
Elevated
Highest-severity
9 Toxics Release Inventory facilities
Sources Checked
across Texas County
Severity Distribution
across Texas County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Texas County, two things run higher than the national average across Texas County — CAFO (21 sites) and Nitrate (344 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Texas County
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 Texas County average
Your land is one point inside Texas County
Everything above resolves to Texas County as a whole — one PHZM band and one county frost record, read across 1.3M 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 county 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 county average.
Your Lot vs the Texas County Average
Texas County Average
- ●USDA Zones 6b, averaged across Texas County
- ●One soil character for all of Texas County
- ●Frost dates read at Texas County's scale: Apr 9 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Texas County's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Texas County
Pull a site-specific report for your exact address in Texas County, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Texas County averages can't show:
We read public map data around Texas County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Texas County average
How we know this about Texas County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Texas County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Texas County
When does frost risk typically end in Texas County?
The last hard freeze (28°F) in Texas County typically lands around Apr 9, 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 30.
How long is the growing season in Texas County?
Measured between 28°F hard freezes, Texas County sees about 204 frost-free days — roughly Apr 9 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 16, about 169 days.
Is the soil safe to grow vegetables in Texas County?
The federal record around Texas County is a meaningful one — 520 documented sites, mostly Nitrate entries (344), the nearest PFAS record about 0.7 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.
Everything above is measured at Texas County's scale — its 6b band and its 204-day season. Your yard writes its own version of Texas County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Oklahoma's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Texas County’s own scale
8 of the readings below were taken at Texas County's own scale — its own ~204-day span between 28°F freezes, the 3 most extensive soil series mapped here and 520 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Texas County's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Texas County's own 28°F hard-freeze dates and its ~204-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Texas CountyUSDA NRCS SSURGO
- 520 documented contamination sites inside the county boundary, distance-sorted from its center — the closest PFAS record about 0.7 miles outFederal environmental registers
- Texas County's boundary and the 1,306,426 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~204-day seasonGrowable Ground crop-matching engine
- The 2 ecoregions Texas County spans, High Plains the largestUS EPA Level III Ecoregions
- Which agricultural compounds go onto Texas County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Oklahoma grower plans around — written at state scale, so they stay on the state guidefrom Oklahoma
What this page can’t tell you
- How the season shifts across Texas County — the ~204 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Texas County's 1,306,426 acreswhy one lot differs from the next →
- Which of those 520 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Texas Countyread your own land →