Carnegie, Oklahoma, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include cabbage, prickly pear, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Carnegie, 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 Carnegie 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 Carnegie — soil, climate, flood, and parcel records. How we handle your address.
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Carnegie — the short answer
Carnegie, Oklahoma: USDA zone 7b, about 239 days between hard freezes, across 853 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~239
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 853 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 Carnegie's average, not your lot's — a low corner or a tree line moves it. Against Carnegie's 239-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Carnegie
Each reading below is measured for Carnegie itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCarnegie runs about 239 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
MeasuredCarnegie 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 Carnegie is in
Carnegie sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Carnegie's own centroid rather than borrowed from Caddo County.
What Grows in Carnegie
Every plant below cleared Carnegie's own zone 7b and its 239-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Carnegie?
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 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 13 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Carnegie
Closest first, within ~10 miles of Carnegie. Listing isn't leaking, and distance isn't exposure.
- Hop & SackUnderground Storage Tanks · 350 ft
- Turney's GarageUnderground Storage Tanks · 700 ft
- Taylor Petro, Inc. #217Underground Storage Tanks · 1100 ft
- Super Quick StopUnderground Storage Tanks · 1200 ft
- BEAUTY CRAFT VANITIESToxics Release Inventory · 1300 ft
- CADDO COUNTY LANDFILL #3Superfund · 1400 ft
- Col. Burt FlaigUnderground Storage Tanks · 1600 ft
- Stan SweeneyUnderground Storage Tanks · 1700 ft
- Bus Storage Area Between 3Rd &Underground Storage Tanks · 1900 ft
- Circle CUnderground Storage Tanks · 2000 ft
- G&D Automotive ServiceUnderground Storage Tanks · 2200 ft
- Farmer's Coop Mill & ElevatorUnderground Storage Tanks · 2400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Carnegie'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 Carnegie.
Total Sites
133
within ~10 miles of Carnegie
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Carnegie
Severity Distribution
within ~10 miles of Carnegie
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Carnegie, two things run higher than the national average within ~10 miles of Carnegie — Nitrate (74 sites) and Superfund (3 sites). 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.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Carnegie
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 Carnegie average
Your land is one point inside Carnegie
Everything above resolves to Carnegie as a whole — one PHZM band and one 28°F frost record, read across 853 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 Carnegie Average
Carnegie Average
- ●USDA Zones 7b, averaged across Carnegie
- ●One soil character for all of Carnegie
- ●Frost dates read at Carnegie's scale: Mar 19 to Nov 13
YOUR Parcel
- ✓Your exact zone, not Carnegie's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Carnegie
Pull a site-specific report for your exact address in Carnegie, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Carnegie averages can't show:
We read public map data around Carnegie — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Carnegie average
How we know this about Carnegie
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 Carnegie’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 Carnegie
When does frost risk typically end in Carnegie?
The last hard freeze (28°F) in Carnegie typically lands around Mar 19, 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 9.
When is the first frost in Carnegie?
The first hard freeze (28°F) in Carnegie typically arrives around Nov 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 30, so the watching starts about Oct 14 — about 239 days after the spring freeze cleared.
How long is the growing season in Carnegie?
Measured between 28°F hard freezes, Carnegie sees about 239 frost-free days — roughly Mar 19 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 9 to Oct 30, about 204 days.
Is the soil safe to grow vegetables in Carnegie?
The federal record around Carnegie is a meaningful one — 133 documented sites, mostly Nitrate entries (74), the nearest Underground Storage Tanks record under a tenth of a mile 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 Carnegie?
From about Oct 14 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Carnegie's scale — its 7b band and its 239-day season. Your yard writes its own version of Carnegie'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 Carnegie’s own scale
6 of the readings below were taken at Carnegie's own scale — its own ~239-day season between 28°F freezes, the 853 acres it covers and 133 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Carnegie's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Carnegie's own 28°F hard-freeze dates, about Mar 19 and Nov 13 and the ~239-day span between themNOAA 1991–2020 Climate Normals
- 133 documented contamination sites on the federal record near Carnegie, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Carnegie's boundary and the 853 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~239-day seasonGrowable Ground crop-matching engine
- The ecoregion at Carnegie's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Carnegie's 853 acres read through its county's SSURGO summaryfrom Caddo County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Caddo 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 Caddo County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Carnegie's 853 acreswhy one lot differs from the next →
- Which side of Carnegie you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 853 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Carnegie-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaCarnegie sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides