Devol, Oklahoma, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Well-matched crops include cabbage, fig, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Devol, 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 Devol 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 Devol — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Devol — the short answer
Devol, Oklahoma: USDA zone 8a, about 251 days between hard freezes, across 319 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~251
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 319 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 Devol's average, not your lot's — a low corner or a tree line moves it. Against Devol's 251-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Devol
Each reading below is measured for Devol itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDevol runs about 251 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
MeasuredDevol 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 Devol is in
Devol sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Devol's own centroid rather than borrowed from Cotton County.
What Grows in Devol
Every plant below cleared Devol's own zone 8a and its 251-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Devol?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 19 — 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 Devol
Closest first, within ~10 miles of Devol. Listing isn't leaking, and distance isn't exposure.
- Comanche Nation Travel PlazaUnderground Storage Tanks · 4.3 mi
- Former Johnnie's CornerUnderground Storage Tanks · 5.3 mi
- Coop Services IncUnderground Storage Tanks · 5.7 mi
- Dunham Service StationUnderground Storage Tanks · 5.8 mi
- McGee's Diesel RepairUnderground Storage Tanks · 5.9 mi
- Randlett Northwest-1Mining · 5.9 mi
- City Of GrandfieldUnderground Storage Tanks · 5.9 mi
- Thrift-1Mining · 5.9 mi
- Not Listed/John PartonUnderground Storage Tanks · 6.1 mi
- The General StoreUnderground Storage Tanks · 6.1 mi
- Red River Tire & SupplyUnderground Storage Tanks · 6.2 mi
- Kwik SakUnderground Storage Tanks · 6.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Devol'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 Devol.
Total Sites
65
within ~10 miles of Devol
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Devol
Severity Distribution
within ~10 miles of Devol
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Devol, two things run higher than the national average within ~10 miles of Devol — Underground Storage Tanks (47 sites) and Mining (4 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Devol
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 Devol average
Your land is one point inside Devol
Everything above resolves to Devol as a whole — one PHZM band and one 28°F frost record, read across 319 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 Devol Average
Devol Average
- ●USDA Zones 8a, averaged across Devol
- ●One soil character for all of Devol
- ●Frost dates read at Devol's scale: Mar 13 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Devol's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Devol
Pull a site-specific report for your exact address in Devol, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Devol averages can't show:
We read public map data around Devol — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Devol average
How we know this about Devol
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 Devol’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 Devol
When does frost risk typically end in Devol?
The last hard freeze (28°F) in Devol typically lands around Mar 13, 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 3.
When is the first frost in Devol?
The first hard freeze (28°F) in Devol typically arrives around Nov 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 5, so the watching starts about Oct 20 — about 251 days after the spring freeze cleared.
How long is the growing season in Devol?
Measured between 28°F hard freezes, Devol sees about 251 frost-free days — roughly Mar 13 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 3 to Nov 5, about 216 days.
Is the soil safe to grow vegetables in Devol?
The federal record around Devol shows 65 documented sites, mostly Underground Storage Tanks entries (47), the nearest Underground Storage Tanks record about 4.3 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 Devol?
From about Oct 20 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Devol's scale — its 8a band and its 251-day season. Your yard writes its own version of Devol'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 Devol’s own scale
6 of the readings below were taken at Devol's own scale — its own ~251-day season between 28°F freezes, the 319 acres it covers and 65 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Devol's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Devol's own 28°F hard-freeze dates, about Mar 13 and Nov 19 and the ~251-day span between themNOAA 1991–2020 Climate Normals
- 65 documented contamination sites on the federal record near Devol, the closest Underground Storage Tanks record about 4.3 miles out from the town centreFederal environmental registers
- Devol's boundary and the 319 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~251-day seasonGrowable Ground crop-matching engine
- The ecoregion at Devol's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Devol's 319 acres read through its county's SSURGO summaryfrom Cotton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cotton County
- The growing challenges every Oklahoma grower plans around — written at state scale, so they stay on the state guidefrom Oklahoma
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Cotton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Devol's 319 acreswhy one lot differs from the next →
- Which side of Devol you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 319 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 4.3 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 Devol-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaDevol sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides