Calumet, Oklahoma, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Growers here do well with cabbage, prickly pear, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Calumet, 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 Calumet 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 Calumet — soil, climate, flood, and parcel records. How we handle your address.
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Calumet — the short answer
Calumet, Oklahoma: USDA zone 7b, about 234 days between hard freezes, across 809 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~234
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 809 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 Calumet's average, not your lot's — a low corner or a tree line moves it. Against Calumet's 234-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Calumet
Each reading below is measured for Calumet itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCalumet runs about 234 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
MeasuredCalumet 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 Calumet is in
Calumet sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Calumet's own centroid rather than borrowed from Canadian County.
What Grows in Calumet
Every plant below cleared Calumet's own zone 7b and its 234-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Calumet?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 23 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 12 — 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 Calumet
Closest first, within ~10 miles of Calumet. Listing isn't leaking, and distance isn't exposure.
- Moore's Farm Service CenterUnderground Storage Tanks · 1100 ft
- Alvin MoberlyUnderground Storage Tanks · 1600 ft
- Quik StopUnderground Storage Tanks · 1700 ft
- Jiffy Trip #314Underground Storage Tanks · 1800 ft
- Calumet Oil CoUnderground Storage Tanks · 1800 ft
- ALLIANCE RECOVERYBrownfields · 0.6 mi
- 13N-09W-13 C 1Nitrate · 0.7 mi
- BOSQUE DISPOSAL SYSTEMS CALUMET YARDBrownfields · 0.8 mi
- ATLAS OIL - CALUMETBrownfields · 0.8 mi
- CANADIAN VALLEY GAS PLANTToxics Release Inventory · 1.0 mi
- Jordan FarmsUnderground Storage Tanks · 1.5 mi
- 13N-08W-19 BBB 1Nitrate · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Calumet'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 Calumet.
Total Sites
149
within ~10 miles of Calumet
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Calumet
Severity Distribution
within ~10 miles of Calumet
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Calumet, two things run higher than the national average within ~10 miles of Calumet — CAFO (5 sites) and Nitrate (92 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Calumet
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 Calumet average
Your land is one point inside Calumet
Everything above resolves to Calumet as a whole — one PHZM band and one 28°F frost record, read across 809 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 Calumet Average
Calumet Average
- ●USDA Zones 7b, averaged across Calumet
- ●One soil character for all of Calumet
- ●Frost dates read at Calumet's scale: Mar 23 to Nov 12
YOUR Parcel
- ✓Your exact zone, not Calumet's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Calumet
Pull a site-specific report for your exact address in Calumet, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Calumet averages can't show:
We read public map data around Calumet — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Calumet average
How we know this about Calumet
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 Calumet’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 Calumet
When does frost risk typically end in Calumet?
The last hard freeze (28°F) in Calumet typically lands around Mar 23, 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 13.
When is the first frost in Calumet?
The first hard freeze (28°F) in Calumet typically arrives around Nov 12, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 29, so the watching starts about Oct 13 — about 234 days after the spring freeze cleared.
How long is the growing season in Calumet?
Measured between 28°F hard freezes, Calumet sees about 234 frost-free days — roughly Mar 23 through Nov 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 13 to Oct 29, about 199 days.
Is the soil safe to grow vegetables in Calumet?
The federal record around Calumet is a meaningful one — 149 documented sites, mostly Nitrate entries (92), the nearest Underground Storage Tanks record about 0.2 miles 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 Calumet?
From about Oct 13 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 12 (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 12. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Calumet's scale — its 7b band and its 234-day season. Your yard writes its own version of Calumet'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 Calumet’s own scale
6 of the readings below were taken at Calumet's own scale — its own ~234-day season between 28°F freezes, the 809 acres it covers and 149 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Calumet's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Calumet's own 28°F hard-freeze dates, about Mar 23 and Nov 12 and the ~234-day span between themNOAA 1991–2020 Climate Normals
- 149 documented contamination sites on the federal record near Calumet, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Calumet's boundary and the 809 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~234-day seasonGrowable Ground crop-matching engine
- The ecoregion at Calumet's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Calumet's 809 acres read through its county's SSURGO summaryfrom Canadian County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Canadian 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 Canadian County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Calumet's 809 acreswhy one lot differs from the next →
- Which side of Calumet you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 809 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 Calumet-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaCalumet sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides