The Oklahoma Panhandle ("No Man's Land") spans USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Oklahoma's only zone-6b ground: the three-county Panhandle — Cimarron, Texas, and Beaver, the historic "No Man's Land" — is the coldest, driest, shortest-season, and highest corner of the state. A 197-204-day frost-free window on semi-arid High Plains tableland near 4,000+ ft climbs to Black Mesa (4,973 ft), Oklahoma's highest point. This is dryland-wheat and grain-sorghum country where wind and irrigation, not the state's warmer ~7a core, decide what grows. The conditions favor tomato, okra, pecan, and redbud, among others — though every individual site edits that list with its own soil, sun, and drainage.
The Oklahoma Panhandle ("No Man's Land") spans Oklahoma.
Your yard isn't all of the Oklahoma Panhandle ("No Man's Land").
The Oklahoma Panhandle ("No Man's Land") spans USDA zones 6b, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 Oklahoma Panhandle ("No Man's Land") — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
The Oklahoma Panhandle ("No Man's Land") — the short answer
The Oklahoma Panhandle ("No Man's Land"): USDA zones 6b, 197–204 frost-free days, in Oklahoma.
- USDA zones
- 6b
- USDA PHZM 2023, aggregated over the footprint
- Frost-free season
- 197–204 days
- NOAA Regional Climate Centers ACIS, 1991-2020
- Counties
- 3
- US Census TIGER/Line 2025
- Region type
- County cluster
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. Where a region publishes no measured season, no season figure is shown.
Hardiness Zone Range
What Grows in the Oklahoma Panhandle ("No Man's Land")
Plants matched to the Oklahoma Panhandle ("No Man's Land")'s USDA zones 6b, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of the Oklahoma Panhandle ("No Man's Land")
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the Oklahoma Panhandle ("No Man's Land")’s USDA zones 6b — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across the Oklahoma Panhandle ("No Man's Land")
The USDA soil survey maps this ground county by county. These are those records weighted by land area across three member counties — this region’s own profile, not a state figure.
The ground is predominantly Mollisols, at 44% of mapped acres, followed by Alfisols (22%), Entisols (15%) and Inceptisols (14%). Six soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Dalhart, Gruver, and Conlen.
88% of those acres are well drained, and another 6% somewhat excessively drained, 3% excessively drained. Topsoil pH runs 7.2–8.0 between the lowest and the highest county on record. 28% of the footprint is classed prime farmland.
Soil order
Mollisols
Drainage
Well drained
Topsoil pH
7.2–8.0
Hydric soils
1%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Texas County holds the most wetland ground here, at 1% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the Oklahoma Panhandle ("No Man's Land")
The soil survey reads this ground county by county, and the readings above are those records summed across the Oklahoma Panhandle ("No Man's Land"). Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records88% of the mapped acres across the Oklahoma Panhandle ("No Man's Land") are well drained — ground that drains quickly. That is area-weighted across all three of its mapped counties.
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
From county recordsTopsoil across the Oklahoma Panhandle ("No Man's Land") runs pH 7.2–8.0 — alkaline in all three of them.
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
Safe to Grow Here?
What the federal record shows across the Oklahoma Panhandle ("No Man's Land") — and how to grow with it.
Across the Oklahoma Panhandle ("No Man's Land")'s 3 counties the federal record holds 929 documented sites, mostly Nitrate (638), Underground Storage Tanks (214) and CAFO (30). The heaviest single county is Texas County, with 520.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to the Oklahoma Panhandle ("No Man's Land") to see which records sit where you actually grow.
Sources Checked
Summed across the 3 counties in the Oklahoma Panhandle ("No Man's Land")
A note from Gnorman
What an experienced grower watches for around here
In and around the Oklahoma Panhandle ("No Man's Land"), two things run higher than the national average across the 3 counties in the Oklahoma Panhandle ("No Man's Land") — CAFO (30 sites) and Nitrate (638 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).
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the Oklahoma Panhandle ("No Man's Land")
Everything above resolves to the Oklahoma Panhandle ("No Man's Land") as a whole — a footprint spanning USDA zones 6b. Your parcel sits in exactly one of them. 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 region 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 regional average.
Your Lot vs the Oklahoma Panhandle ("No Man's Land") Average
Oklahoma Panhandle ("No Man's Land") Average
- ●USDA Zones 6b, averaged across Oklahoma Panhandle ("No Man's Land")
- ●One soil character for all of Oklahoma Panhandle ("No Man's Land")
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Oklahoma Panhandle ("No Man's Land")'s 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Oklahoma Panhandle ("No Man's Land")
Pull a site-specific report for your exact address in the Oklahoma Panhandle ("No Man's Land") — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Oklahoma Panhandle ("No Man's Land") averages can't show:
We read public map data around The Oklahoma Panhandle ("No Man's Land") — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oklahoma Panhandle ("No Man's Land") average
How we know this about the Oklahoma Panhandle ("No Man's Land")
The boundary: a cluster of neighboring counties. Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about the Oklahoma Panhandle ("No Man's Land")
What hardiness zone is the Oklahoma Panhandle ("No Man's Land")?
The Oklahoma Panhandle ("No Man's Land") spans USDA hardiness zones 6b, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in the Oklahoma Panhandle ("No Man's Land")?
Measured between 28°F hard freezes, the Oklahoma Panhandle ("No Man's Land")'s counties mostly run 200 to 203 frost-free days, median 202 (NOAA Regional Climate Centers ACIS, 1991–2020, over 3 member counties). That 3-day spread is the honest read — no single season describes 3 counties, and each county guide below carries its own.
When does frost risk end in the Oklahoma Panhandle ("No Man's Land")?
Across the Oklahoma Panhandle ("No Man's Land"), the middle half of member counties see their last 28°F hard freeze between Apr 9 and Apr 11 (median Apr 9), and their first fall freeze between Oct 28 and Oct 29. Those are hard freezes, not the last light frost: tender transplants wait for about Apr 30, and elevation decides which end of a 2-day spread you garden in.
What grows well in the Oklahoma Panhandle ("No Man's Land")?
The Oklahoma Panhandle ("No Man's Land")'s conditions suit plants such as Tomato, Okra, Pecan, Redbud, Blackberry. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is the Oklahoma Panhandle ("No Man's Land") defined?
The Oklahoma Panhandle ("No Man's Land") is defined here as a curated cluster of 3 neighboring counties that share a growing character. Growing regions have no official boundary, so this footprint is our published one — every county in it is named on this page.
Which states does the Oklahoma Panhandle ("No Man's Land") cover?
The Oklahoma Panhandle ("No Man's Land") spans Oklahoma. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
High Plains, The Ozarks, and Southeastern Oklahoma / Ouachita Mountains (Kiamichi Country) share at least one state with the Oklahoma Panhandle ("No Man's Land"). Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at the Oklahoma Panhandle ("No Man's Land")’s own scale
6 of the readings below were taken at the Oklahoma Panhandle ("No Man's Land")'s own scale — the zone 6b band across its footprint, a median 202-day season across its 3 counties and 929 documented federal contamination records across its 3 counties, 520 of them in Texas County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 6b aggregated across all 3 counties in the footprintUSDA PHZM 2023
- The boundary itself — the 3 counties this region is curated fromGrowable Ground subregion registry
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 3 counties run 200 to 203 frost-free days, median 202NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 929 documented federal contamination records across its 3 counties, 520 of them in Texas County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 44% Mollisols, topsoil pH 7.2–8.0, area-weighted across its 3 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 6bfrom Oklahoma
What this page can’t tell you
- Which end of the 3-day range your ground sits at — 200 days at one extreme, 203 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore the Oklahoma Panhandle ("No Man's Land")
State growing guides
Counties in this region
Other growing regions across Oklahoma
A semi-arid shortgrass tableland of deep soils and big sky, where wind, low rainfall, and irrigation shape dryland wheat, sorghum, and resilient gardens.
A rugged Interior Highlands of cherty, rocky soils, oak-hickory forest, and clear streams — brambles, peaches, and tough hill gardens.
Oklahoma's warmest, wettest, longest-season corner — a genuinely different growing world from the state core. The Ouachita Mountains and Kiamichi River country hold verified USDA zone 8a across the Red River bottomlands, with 243–267 frost-free days (Choctaw 267, McCurtain 249) — up to ~70 days longer than the Panhandle — over acidic, shortleaf-pine-forested mountain soils fed by roughly 50 inches of annual rain. A statewide reading (~zone 7a, central) misses all of it: the two higher northern counties (Le Flore, Latimer) even step down to 7b, so this region carries its own zone-and-season logic.