Chattanooga, Oklahoma, sits in USDA hardiness zone 8a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Chattanooga, 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 Chattanooga 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 Chattanooga — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Chattanooga — the short answer
Chattanooga, Oklahoma: USDA zone 8a, about 246 days between hard freezes, across 335 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 16
- 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
- ~246
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 335 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 Chattanooga's average, not your lot's — a low corner or a tree line moves it. Against Chattanooga's 246-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Chattanooga
Each reading below is measured for Chattanooga itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredChattanooga runs about 246 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
MeasuredChattanooga 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 Chattanooga is in
Chattanooga sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Chattanooga's own centroid rather than borrowed from Comanche County.
What Grows in Chattanooga
Every plant below cleared Chattanooga's own zone 8a and its 246-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Chattanooga?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 16 (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. 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 Chattanooga
Closest first, within ~10 miles of Chattanooga. Listing isn't leaking, and distance isn't exposure.
- Former Garza's GroceryUnderground Storage Tanks · 1100 ft
- Grapevine GroceryUnderground Storage Tanks · 1100 ft
- Hop N SackUnderground Storage Tanks · 1200 ft
- Mangum Oil & Gas CoUnderground Storage Tanks · 1500 ft
- Coop Services IncUnderground Storage Tanks · 2000 ft
- Coop Services ChattanoogaUnderground Storage Tanks · 2200 ft
- BASELINE CATTLE CO.CAFO · 5.3 mi
- 01N-14W-22 DDA 1Nitrate · 7.9 mi
- Vance ProspectMining · 9.1 mi
- Hamm Supply Co IncUnderground Storage Tanks · 9.6 mi
Measured from Chattanooga'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 Chattanooga.
Sources Checked
within ~10 miles of Chattanooga
Severity Distribution
within ~10 miles of Chattanooga
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Large animal operations push nitrates and bacteria downstream. Below one, test your water.
Check your specific parcel in Chattanooga
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 Chattanooga average
Your land is one point inside Chattanooga
Everything above resolves to Chattanooga as a whole — one PHZM band and one 28°F frost record, read across 335 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 Chattanooga Average
Chattanooga Average
- ●USDA Zones 8a, averaged across Chattanooga
- ●One soil character for all of Chattanooga
- ●Frost dates read at Chattanooga's scale: Mar 16 to Nov 17
YOUR Parcel
- ✓Your exact zone, not Chattanooga's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Chattanooga
Pull a site-specific report for your exact address in Chattanooga, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Chattanooga averages can't show:
We read public map data around Chattanooga — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Chattanooga average
How we know this about Chattanooga
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 Chattanooga’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 Chattanooga
When does frost risk typically end in Chattanooga?
The last hard freeze (28°F) in Chattanooga typically lands around Mar 16, 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 6.
When is the first frost in Chattanooga?
The first hard freeze (28°F) in Chattanooga 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 246 days after the spring freeze cleared.
How long is the growing season in Chattanooga?
Measured between 28°F hard freezes, Chattanooga sees about 246 frost-free days — roughly Mar 16 through Nov 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 6 to Nov 3, about 211 days.
Is the soil safe to grow vegetables in Chattanooga?
The federal record around Chattanooga is light — 11 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (7), 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 Chattanooga?
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 Chattanooga's scale — its 8a band and its 246-day season. Your yard writes its own version of Chattanooga'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 Chattanooga’s own scale
6 of the readings below were taken at Chattanooga's own scale — its own ~246-day season between 28°F freezes, the 335 acres it covers and 11 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Chattanooga's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Chattanooga's own 28°F hard-freeze dates, about Mar 16 and Nov 17 and the ~246-day span between themNOAA 1991–2020 Climate Normals
- 11 documented contamination sites on the federal record near Chattanooga, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Chattanooga's boundary and the 335 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~246-day seasonGrowable Ground crop-matching engine
- The ecoregion at Chattanooga's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Chattanooga's 335 acres read through its county's SSURGO summaryfrom Comanche County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Comanche 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 Comanche County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Chattanooga's 335 acreswhy one lot differs from the next →
- Which side of Chattanooga you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 335 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 Chattanooga-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaChattanooga sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides