Ringwood, Oklahoma, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Growers here do well with cabbage, hazelnut, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Ringwood, 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 Ringwood 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 Ringwood — soil, climate, flood, and parcel records. How we handle your address.
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Ringwood — the short answer
Ringwood, Oklahoma: USDA zone 7a, about 229 days between hard freezes, across 533 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
- 533 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 Ringwood's average, not your lot's — a low corner or a tree line moves it. Against Ringwood's 229-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ringwood
Each reading below is measured for Ringwood itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRingwood 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
MeasuredRingwood 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 Ringwood is in
Ringwood sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Ringwood's own centroid rather than borrowed from Major County.
What Grows in Ringwood
Every plant below cleared Ringwood'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 Ringwood?
Almost never — the real question is what to plant next. 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. 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 Ringwood
Closest first, within ~10 miles of Ringwood. Listing isn't leaking, and distance isn't exposure.
- 22N-10W-14 D 1Nitrate · 1400 ft
- Ringwood Public SchoolUnderground Storage Tanks · 1800 ft
- Former Robinsons Service StationUnderground Storage Tanks · 2200 ft
- Great Plains Coop Ringwood BranchUnderground Storage Tanks · 2600 ft
- HAMM & PHILLIPS SVC COBrownfields · 0.7 mi
- Ringwood BoosterUnderground Storage Tanks · 0.7 mi
- Jiffy Trip #140Underground Storage Tanks · 1.3 mi
- 22N-10W-24 CDC 1Nitrate · 1.7 mi
- 22N-10W-16 D 1Nitrate · 1.8 mi
- MUSTANG GAS PROD LLC/RINGWOOD GAS PLANTToxics Release Inventory · 1.8 mi
- MUSTANG GAS PROD LLC/RINGWOOD GAS PLANTBrownfields · 1.8 mi
- 22N-10W-14 B 1Nitrate · 1.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Ringwood'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 Ringwood.
Total Sites
141
within ~10 miles of Ringwood
Risk Level
Moderate
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Ringwood
Severity Distribution
within ~10 miles of Ringwood
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ringwood, Nitrate runs higher than the national average — 114 sites within ~10 miles of Ringwood. 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 Ringwood
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 Ringwood average
Your land is one point inside Ringwood
Everything above resolves to Ringwood as a whole — one PHZM band and one 28°F frost record, read across 533 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 Ringwood Average
Ringwood Average
- ●USDA Zones 7a, averaged across Ringwood
- ●One soil character for all of Ringwood
- ●Frost dates read at Ringwood's scale: Mar 27 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Ringwood's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ringwood
Pull a site-specific report for your exact address in Ringwood, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ringwood averages can't show:
We read public map data around Ringwood — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ringwood average
How we know this about Ringwood
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 Ringwood’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 Ringwood
When does frost risk typically end in Ringwood?
The last hard freeze (28°F) in Ringwood 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 Ringwood?
The first hard freeze (28°F) in Ringwood 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 Ringwood?
Measured between 28°F hard freezes, Ringwood 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 Ringwood?
The federal record around Ringwood shows 141 documented sites, mostly Nitrate entries (114), the nearest Nitrate 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 Ringwood?
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 Ringwood's scale — its 7a band and its 229-day season. Your yard writes its own version of Ringwood'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 Ringwood’s own scale
6 of the readings below were taken at Ringwood's own scale — its own ~229-day season between 28°F freezes, the 533 acres it covers and 141 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ringwood's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Ringwood's own 28°F hard-freeze dates, about Mar 27 and Nov 11 and the ~229-day span between themNOAA 1991–2020 Climate Normals
- 141 documented contamination sites on the federal record near Ringwood, the closest Nitrate record about 0.3 miles out from the town centreFederal environmental registers
- Ringwood's boundary and the 533 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 Ringwood's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Ringwood's 533 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 Ringwood's 533 acreswhy one lot differs from the next →
- Which side of Ringwood you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 533 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Ringwood-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaRingwood sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides