Cleo Springs, Oklahoma, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, hazelnut, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Cleo Springs, 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 Cleo Springs 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 Cleo Springs — soil, climate, flood, and parcel records. How we handle your address.
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Cleo Springs — the short answer
Cleo Springs, Oklahoma: USDA zone 7a, about 229 days between hard freezes, across 354 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~229
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 354 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 7a is Cleo Springs's average, not your lot's — a low corner or a tree line moves it. Against Cleo Springs's 229-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Cleo Springs
Each reading below is measured for Cleo Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCleo Springs runs about 229 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
MeasuredCleo Springs sits in USDA hardiness zone 7a.
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 Cleo Springs is in
Cleo Springs sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Cleo Springs's own centroid rather than borrowed from Major County.
What Grows in Cleo Springs
Every plant below cleared Cleo Springs's own zone 7a and its 229-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Cleo Springs?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 11 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
What's on the federal record near Cleo Springs
Closest first, within ~10 miles of Cleo Springs. Listing isn't leaking, and distance isn't exposure.
- Randall RenshawUnderground Storage Tanks · 750 ft
- 22N-12W-01 C 1Nitrate · 1500 ft
- Cleo Springs BoosterUnderground Storage Tanks · 1.0 mi
- Jiffy Trip #105Underground Storage Tanks · 1.2 mi
- 22N-12W-10 DBA 1Nitrate · 1.6 mi
- 22N-12W-03 DBC 1Nitrate · 1.6 mi
- 22N-12W-10 DCC 1Nitrate · 1.9 mi
- 22N-12W-03 CAD 1Nitrate · 1.9 mi
- 22N-11W-08 BD 1Nitrate · 2.0 mi
- 23N-12W-36 AAA 1Nitrate · 2.1 mi
- 22N-11W-05 BBD 1Nitrate · 2.1 mi
- 22N-12W-04 ABD 1Nitrate · 2.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Cleo Springs'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 Cleo Springs.
Sources Checked
within ~10 miles of Cleo Springs
Severity Distribution
within ~10 miles of Cleo Springs
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Cleo Springs, Nitrate runs higher than the national average — 140 sites within ~10 miles of Cleo Springs. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Cleo Springs
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 Cleo Springs average
Your land is one point inside Cleo Springs
Everything above resolves to Cleo Springs as a whole — one PHZM band and one 28°F frost record, read across 354 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 Cleo Springs Average
Cleo Springs Average
- ●USDA Zones 7a, averaged across Cleo Springs
- ●One soil character for all of Cleo Springs
- ●Frost dates read at Cleo Springs's scale: Mar 27 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Cleo Springs's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Cleo Springs
Pull a site-specific report for your exact address in Cleo Springs, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Cleo Springs averages can't show:
We read public map data around Cleo Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Cleo Springs average
How we know this about Cleo Springs
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 Cleo Springs’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 Cleo Springs
When does frost risk typically end in Cleo Springs?
The last hard freeze (28°F) in Cleo Springs typically lands around Mar 27, 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 17.
When is the first frost in Cleo Springs?
The first hard freeze (28°F) in Cleo Springs typically arrives around Nov 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 28, so the watching starts about Oct 12 — about 229 days after the spring freeze cleared.
How long is the growing season in Cleo Springs?
Measured between 28°F hard freezes, Cleo Springs sees about 229 frost-free days — roughly Mar 27 through Nov 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 28, about 194 days.
Is the soil safe to grow vegetables in Cleo Springs?
The federal record around Cleo Springs shows 179 documented sites, mostly Nitrate entries (140), the nearest Underground Storage Tanks record about 0.1 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 Cleo Springs?
From about Oct 12 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Cleo Springs's scale — its 7a band and its 229-day season. Your yard writes its own version of Cleo Springs'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 Cleo Springs’s own scale
6 of the readings below were taken at Cleo Springs's own scale — its own ~229-day season between 28°F freezes, the 354 acres it covers and 179 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Cleo Springs's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Cleo Springs's own 28°F hard-freeze dates, about Mar 27 and Nov 11 and the ~229-day span between themNOAA 1991–2020 Climate Normals
- 179 documented contamination sites on the federal record near Cleo Springs, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Cleo Springs's boundary and the 354 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~229-day seasonGrowable Ground crop-matching engine
- The ecoregion at Cleo Springs's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Cleo Springs's 354 acres read through its county's SSURGO summaryfrom Major County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Major 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 Major County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Cleo Springs's 354 acreswhy one lot differs from the next →
- Which side of Cleo Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 354 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Cleo Springs-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaCleo Springs sits outside our named growing regions, so Oklahoma as a whole is its closest context here.