Watonga, Oklahoma, sits in USDA hardiness zone 7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
These conditions suit cabbage, prickly pear, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Watonga, 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 Watonga 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 Watonga — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Watonga — the short answer
Watonga, Oklahoma: USDA zone 7b, about 232 days between hard freezes, across 2K acres of city.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- 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
- ~232
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 2K 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 7b is Watonga's average, not your lot's — a low corner or a tree line moves it. Against Watonga's 232-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Watonga
Each reading below is measured for Watonga itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWatonga runs about 232 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
MeasuredWatonga sits in USDA hardiness zone 7b.
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 Watonga is in
Watonga sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Watonga's own centroid rather than borrowed from Blaine County.
What Grows in Watonga
Every plant below cleared Watonga's own zone 7b and its 232-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Watonga?
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 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (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. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
What's on the federal record near Watonga
Closest first, within ~10 miles of Watonga. Listing isn't leaking, and distance isn't exposure.
- County Storage BarnUnderground Storage Tanks · 1700 ft
- Butler Self ServUnderground Storage Tanks · 2000 ft
- Det 1, Btry C 1/189 FaUnderground Storage Tanks · 2300 ft
- B & W Ready MixUnderground Storage Tanks · 0.5 mi
- Champlin Petroleum CoUnderground Storage Tanks · 0.5 mi
- Watona Operations CenterUnderground Storage Tanks · 0.5 mi
- Hollytex Spinning MillUnderground Storage Tanks · 0.5 mi
- DANLIN WATONGA BLENDToxics Release Inventory · 0.6 mi
- Metheny Equip. Inc.Underground Storage Tanks · 0.6 mi
- The Country Store IncUnderground Storage Tanks · 0.6 mi
- T & L Kerr Mcgee StationUnderground Storage Tanks · 0.7 mi
- Watonga Public SchoolsUnderground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Watonga'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 Watonga.
Total Sites
70
within ~10 miles of Watonga
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Watonga
Severity Distribution
within ~10 miles of Watonga
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Watonga, two things run higher than the national average within ~10 miles of Watonga — Mining (6 sites) and Nitrate (24 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Watonga
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 Watonga average
Your land is one point inside Watonga
Everything above resolves to Watonga as a whole — one PHZM band and one 28°F frost record, read across 2K 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 city 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 Watonga Average
Watonga Average
- ●USDA Zones 7b, averaged across Watonga
- ●One soil character for all of Watonga
- ●Frost dates read at Watonga's scale: Mar 24 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Watonga's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Watonga
Pull a site-specific report for your exact address in Watonga, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Watonga averages can't show:
We read public map data around Watonga — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Watonga average
How we know this about Watonga
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Watonga’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 city grain anywhere on this page — there is no city-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 Watonga
When does frost risk typically end in Watonga?
The last hard freeze (28°F) in Watonga typically lands around Mar 24, 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 14.
When is the first frost in Watonga?
The first hard freeze (28°F) in Watonga 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 232 days after the spring freeze cleared.
How long is the growing season in Watonga?
Measured between 28°F hard freezes, Watonga sees about 232 frost-free days — roughly Mar 24 through Nov 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Oct 28, about 197 days.
Is the soil safe to grow vegetables in Watonga?
The federal record around Watonga shows 70 documented sites, mostly Underground Storage Tanks entries (37), the nearest Underground Storage Tanks record about 0.3 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 Watonga?
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 Watonga's scale — its 7b band and its 232-day season. Your yard writes its own version of Watonga'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 Watonga’s own scale
6 of the readings below were taken at Watonga's own scale — its own ~232-day season between 28°F freezes, the 2,412 acres it covers and 70 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Watonga's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Watonga's own 28°F hard-freeze dates, about Mar 24 and Nov 11 and the ~232-day span between themNOAA 1991–2020 Climate Normals
- 70 documented contamination sites on the federal record near Watonga, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Watonga's boundary and the 2,412 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~232-day seasonGrowable Ground crop-matching engine
- The ecoregion at Watonga's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Watonga's 2,412 acres read through its county's SSURGO summaryfrom Blaine County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Blaine 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 Blaine County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Watonga's 2,412 acreswhy one lot differs from the next →
- Which side of Watonga you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,412 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Watonga-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaWatonga sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides