Wann, Oklahoma, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include cabbage, hazelnut, 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 Wann, 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 Wann 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 Wann — soil, climate, flood, and parcel records. How we handle your address.
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Wann — the short answer
Wann, Oklahoma: USDA zone 7a, about 225 days between hard freezes, across 109 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 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~225
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 109 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 Wann's average, not your lot's — a low corner or a tree line moves it. Against Wann's 225-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wann
Each reading below is measured for Wann itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWann runs about 225 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
MeasuredWann 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 Wann is in
Wann sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Wann's own centroid rather than borrowed from Nowata County.
What Grows in Wann
Every plant below cleared Wann's own zone 7a and its 225-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Wann?
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 7 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Wann
Closest first, within ~10 miles of Wann. Listing isn't leaking, and distance isn't exposure.
- Wann Quick StopUnderground Storage Tanks · 1000 ft
- Wann SchoolsUnderground Storage Tanks · 1200 ft
- Burrows ConstructionUnderground Storage Tanks · 1.4 mi
- US ARMY COE HULAH PROJECT OFFICEBrownfields · 4.3 mi
- US ARMY COE COPAN PROJECT OFFICEBrownfields · 4.3 mi
- Burlington RrUnderground Storage Tanks · 4.7 mi
- SOUTHERN STAR CTL G/COTTON VALLEY STABrownfields · 5.3 mi
- Copan Truck Stop Bob ChaneyUnderground Storage Tanks · 6.0 mi
- Copan SchoolUnderground Storage Tanks · 6.4 mi
- Copan Handi MartUnderground Storage Tanks · 6.7 mi
- Phillips 66 Co #042886Underground Storage Tanks · 6.7 mi
- Phillips 66 Co #040075Underground Storage Tanks · 6.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Wann'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 Wann.
Sources Checked
within ~10 miles of Wann
Severity Distribution
within ~10 miles of Wann
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wann, two things run higher than the national average within ~10 miles of Wann — Superfund (3 sites) and Nitrate (18 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Wann
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 Wann average
Your land is one point inside Wann
Everything above resolves to Wann as a whole — one PHZM band and one 28°F frost record, read across 109 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 Wann Average
Wann Average
- ●USDA Zones 7a, averaged across Wann
- ●One soil character for all of Wann
- ●Frost dates read at Wann's scale: Mar 27 to Nov 7
YOUR Parcel
- ✓Your exact zone, not Wann's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wann
Pull a site-specific report for your exact address in Wann, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wann averages can't show:
We read public map data around Wann — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wann average
How we know this about Wann
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 Wann’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 Wann
When does frost risk typically end in Wann?
The last hard freeze (28°F) in Wann 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 Wann?
The first hard freeze (28°F) in Wann typically arrives around Nov 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 24, so the watching starts about Oct 8 — about 225 days after the spring freeze cleared.
How long is the growing season in Wann?
Measured between 28°F hard freezes, Wann sees about 225 frost-free days — roughly Mar 27 through Nov 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 24, about 190 days.
Is the soil safe to grow vegetables in Wann?
The federal record around Wann is a meaningful one — 59 documented sites, mostly Underground Storage Tanks entries (25), the nearest Underground Storage Tanks record about 0.2 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.
How do I protect my plants from frost in Wann?
From about Oct 8 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wann's scale — its 7a band and its 225-day season. Your yard writes its own version of Wann'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 Wann’s own scale
6 of the readings below were taken at Wann's own scale — its own ~225-day season between 28°F freezes, the 109 acres it covers and 59 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wann's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Wann's own 28°F hard-freeze dates, about Mar 27 and Nov 7 and the ~225-day span between themNOAA 1991–2020 Climate Normals
- 59 documented contamination sites on the federal record near Wann, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Wann's boundary and the 109 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~225-day seasonGrowable Ground crop-matching engine
- The ecoregion at Wann's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wann's 109 acres read through its county's SSURGO summaryfrom Nowata County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Nowata 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 Nowata County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wann's 109 acreswhy one lot differs from the next →
- Which side of Wann you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 109 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Wann-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaWann sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides