Caddo, Oklahoma, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Caddo, 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 Caddo 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 Caddo — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Caddo — the short answer
Caddo, Oklahoma: USDA zone 8a, about 250 days between hard freezes, across 1K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~250
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Caddo's average, not your lot's — a low corner or a tree line moves it. Against Caddo's 250-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Caddo
Each reading below is measured for Caddo itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCaddo runs about 250 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
MeasuredCaddo 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 Caddo is in
Caddo sits in the Cross Timbers — EPA Level III, inside the wider Great Plains. That is read at Caddo's own centroid, and it is not what its county reads: Bryan County is mostly East Central Texas Plains. The wider page above you is answering a different question about different ground.
What Grows in Caddo
Every plant below cleared Caddo's own zone 8a and its 250-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Caddo?
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 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 12 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 17 — 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 Caddo
Closest first, within ~10 miles of Caddo. Listing isn't leaking, and distance isn't exposure.
- Piper TexacoUnderground Storage Tanks · 1200 ft
- Former Mobil BulkUnderground Storage Tanks · 1200 ft
- Caddo Short StopUnderground Storage Tanks · 1600 ft
- Caddo Public School Bus BarnUnderground Storage Tanks · 0.6 mi
- C And H One StopUnderground Storage Tanks · 0.6 mi
- Ffp#000527 Dba Kelsey's TruckUnderground Storage Tanks · 0.7 mi
- 04S 10EI sec. 27Nitrate · 4.2 mi
- Je Whitmire Dba Whitmire CoUnderground Storage Tanks · 5.8 mi
- Kenefic Corner MartUnderground Storage Tanks · 6.4 mi
- Redwing ExterminatingUnderground Storage Tanks · 6.5 mi
- Caddo SuperetteUnderground Storage Tanks · 6.9 mi
- Former Betty's Short StopUnderground Storage Tanks · 7.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Caddo'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 Caddo.
Severity Distribution
within ~10 miles of Caddo
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Caddo, Underground Storage Tanks runs higher than the national average — 26 sites within ~10 miles of Caddo. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Caddo
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 Caddo average
Your land is one point inside Caddo
Everything above resolves to Caddo as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Caddo Average
Caddo Average
- ●USDA Zones 8a, averaged across Caddo
- ●One soil character for all of Caddo
- ●Frost dates read at Caddo's scale: Mar 12 to Nov 17
YOUR Parcel
- ✓Your exact zone, not Caddo's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Caddo
Pull a site-specific report for your exact address in Caddo, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Caddo averages can't show:
We read public map data around Caddo — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Caddo average
How we know this about Caddo
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 Caddo’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 Caddo
When does frost risk typically end in Caddo?
The last hard freeze (28°F) in Caddo typically lands around Mar 12, 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 2.
When is the first frost in Caddo?
The first hard freeze (28°F) in Caddo typically arrives around Nov 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 3, so the watching starts about Oct 18 — about 250 days after the spring freeze cleared.
How long is the growing season in Caddo?
Measured between 28°F hard freezes, Caddo sees about 250 frost-free days — roughly Mar 12 through Nov 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 2 to Nov 3, about 215 days.
Is the soil safe to grow vegetables in Caddo?
The federal record around Caddo is light — 29 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (26), the nearest Underground Storage Tanks record about 0.2 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Caddo?
From about Oct 18 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 17 (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 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Caddo's scale — its 8a band and its 250-day season. Your yard writes its own version of Caddo'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 Caddo’s own scale
6 of the readings below were taken at Caddo's own scale — its own ~250-day season between 28°F freezes, the 1,083 acres it covers and 29 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Caddo's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Caddo's own 28°F hard-freeze dates, about Mar 12 and Nov 17 and the ~250-day span between themNOAA 1991–2020 Climate Normals
- 29 documented contamination sites on the federal record near Caddo, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Caddo's boundary and the 1,083 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~250-day seasonGrowable Ground crop-matching engine
- Caddo sits in the Cross Timbers — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Caddo's 1,083 acres read through its county's SSURGO summaryfrom Bryan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Bryan 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 Bryan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Caddo's 1,083 acreswhy one lot differs from the next →
- Which side of Caddo you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,083 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 Caddo-wide figureread your own land →