Atoka County, in Oklahoma, sits in USDA hardiness zone 8a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, fig, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Atoka County lies within the Southeastern Oklahoma / Ouachita Mountains (Kiamichi Country) — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Atoka County holds more than one microclimate.
Soils and elevations shift across Atoka 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 Atoka County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Atoka County — the short answer
Atoka County, Oklahoma: USDA zone 8a, about 242 days between hard freezes, across 624K acres.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 18
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 15
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~242
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 624K 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 8a is Atoka County's average, not your lot's — a low corner or a tree line moves it. Against Atoka County's 242-day season, see what your own ground reads.
Heat and winter chill in Atoka County
Across a year, Atoka County accumulates about 5,022 growing degree days above 50°F, about 302 more than the middle Oklahoma county — ahead of 65 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.
Winter banks about 1,654 hours below 45°F, 265 fewer than the Oklahoma middle of 1,919. Chill is what tells a fruit tree its dormancy is over, and it is set by climate rather than by anything you can build.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Atoka County
Across Atoka County, the ground is predominantly Alfisols, where Carnasaw, Bernow, and Clebit are the most extensive named soil series. The soil is generally well drained with a fine sandy loam surface. Topsoil pH runs about 5.3–6.2, moderately acidic. Rainfall drains through hydrologic group B soils.
Soil order
Alfisols
Drainage
Well drained
Prime farmland
35%
Hydric soils
7%
Soil still varies lot by lot — soil types explained.
How the ground varies across Atoka County
The USDA soil survey maps 54% of Atoka County as well drained — but another 44% drains differently: 29% moderately well drained, 11% somewhat poorly drained.
Carnasaw is the most extensive named soil at 21% of mapped acres, then Bernow (19%) and Clebit (6%).
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 Atoka County
Each reading below is measured for Atoka 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 Atoka 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 Atoka County runs about pH 5.3–6.2, on the acidic side.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Season length
MeasuredAtoka County runs about 242 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
MeasuredAtoka County 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 Atoka County is in
Atoka County spans 3 EPA Level III ecoregions — South Central Plains (44%), Ouachita Mountains (39%) and Arkansas Valley (14%). 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 Atoka County
We scored all 1,086 plants against Atoka County's own USDA zone 8a and its own 242-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 Atoka County?
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 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 18 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 15 — 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 gets applied to farmland in Atoka County
USGS estimates 23,692 lb of 2,4-d on Atoka County farmland in 2019, its largest by weight, ahead of Glyphosate (3,126 lb) and Chlorpyrifos (2,581 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 Atoka County — and how to grow with it.
We checked the federal record across Atoka County — 99 documented sites across 3 of the 9 source types we track.
The most significant on record: 10 brownfield sites. Former commercial or industrial land where legacy contamination may persist.
The federal record across Atoka County is a modest one — a typical footprint for a growing area. Nothing here calls for alarm; it's worth knowing which recorded sites sit closest to where you grow, and each one on the map carries its type and location. If one turns out to be a near neighbor, a one-time soil test settles the question.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Atoka County
Closest first, across Atoka County. Listing isn't leaking, and distance isn't exposure.
- Ethan Allen, Inc.Underground Storage Tanks · 3.7 mi
- Stringtown Travel PlazaUnderground Storage Tanks · 3.8 mi
- OKLAHOMA MATERIALS RECYCLINGBrownfields · 4.0 mi
- ATOKA PAINT AND BODYBrownfields · 4.0 mi
- Former Noel's Food Mart #4Underground Storage Tanks · 4.2 mi
- BODY WORKS THEBrownfields · 4.5 mi
- Lake Atoka ShopUnderground Storage Tanks · 4.5 mi
- Henson's IncUnderground Storage Tanks · 4.6 mi
- 3-Way Oil Co A CorporationUnderground Storage Tanks · 4.7 mi
- 03S-12E-09 A 1Nitrate · 4.9 mi
- Atoka StoreroomUnderground Storage Tanks · 4.9 mi
- City Of Atoka-ShopUnderground Storage Tanks · 5.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Atoka 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 Atoka County.
Severity Distribution
across Atoka County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Atoka County, Underground Storage Tanks runs higher than the national average — 69 sites across Atoka County. 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 Atoka 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 Atoka County average
Your land is one point inside Atoka County
Everything above resolves to Atoka County as a whole — one PHZM band and one county frost record, read across 624K 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 Atoka County Average
Atoka County Average
- ●USDA Zones 8a, averaged across Atoka County
- ●One soil character for all of Atoka County
- ●Frost dates read at Atoka County's scale: Mar 18 to Nov 15
YOUR Parcel
- ✓Your exact zone, not Atoka County's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Atoka County
Pull a site-specific report for your exact address in Atoka County, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Atoka County averages can't show:
We read public map data around Atoka County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Atoka County average
How we know this about Atoka 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 Atoka County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Atoka County
When does frost risk typically end in Atoka County?
The last hard freeze (28°F) in Atoka County typically lands around Mar 18, 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 8.
How long is the growing season in Atoka County?
Measured between 28°F hard freezes, Atoka County sees about 242 frost-free days — roughly Mar 18 through Nov 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 8 to Nov 1, about 207 days.
Is the soil safe to grow vegetables in Atoka County?
The federal record around Atoka County shows 99 documented sites, mostly Underground Storage Tanks entries (69), the nearest Underground Storage Tanks 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.
Everything above is measured at Atoka County's scale — its 8a band and its 242-day season. Your yard writes its own version of Atoka 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 Atoka County’s own scale
8 of the readings below were taken at Atoka County's own scale — its own ~242-day span between 28°F freezes, the 3 most extensive soil series mapped here and 99 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Atoka County's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Atoka County's own 28°F hard-freeze dates and its ~242-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Atoka CountyUSDA NRCS SSURGO
- 99 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 3.7 miles outFederal environmental registers
- Atoka County's boundary and the 624,290 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~242-day seasonGrowable Ground crop-matching engine
- The 3 ecoregions Atoka County spans, South Central Plains the largestUS EPA Level III Ecoregions
- Which agricultural compounds go onto Atoka 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 Atoka County — the ~242 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 Atoka County's 624,290 acreswhy one lot differs from the next →
- Which of those 99 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 Atoka Countyread your own land →