Porum, Oklahoma, sits in USDA hardiness zone 7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
These conditions suit cabbage, prickly pear, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Porum, 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 Porum 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 Porum — soil, climate, flood, and parcel records. How we handle your address.
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Porum — the short answer
Porum, Oklahoma: USDA zone 7b, about 241 days between hard freezes, across 571 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 17
- 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
- ~241
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 571 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 Porum's average, not your lot's — a low corner or a tree line moves it. Against Porum's 241-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Porum
Each reading below is measured for Porum itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPorum runs about 241 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
MeasuredPorum 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 Porum is in
Porum sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Porum's own centroid rather than borrowed from Muskogee County.
What Grows in Porum
Every plant below cleared Porum's own zone 7b and its 241-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Porum?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 17; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 17 (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. 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 Porum
Closest first, within ~10 miles of Porum. Listing isn't leaking, and distance isn't exposure.
- Harrison's D-XUnderground Storage Tanks · 500 ft
- Panther Pit StopUnderground Storage Tanks · 1100 ft
- Porum Public SchoolsUnderground Storage Tanks · 1800 ft
- Circle R Food MartUnderground Storage Tanks · 2000 ft
- Stidham SchoolUnderground Storage Tanks · 3.0 mi
- US ARMY COE EUFAULA LAKE POWERHOUSEBrownfields · 3.6 mi
- US ARMY COE EUFAULA PROJECT OFFICEBrownfields · 4.0 mi
- 10N-20E-10 AAA 1Nitrate · 5.4 mi
- 10N-20E-11 BCC 1Nitrate · 5.4 mi
- 10N-20E-11 CCC 1Nitrate · 5.6 mi
- B & J Oil CoUnderground Storage Tanks · 6.1 mi
- Kum & Go #987Underground Storage Tanks · 6.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Porum'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 Porum.
Sources Checked
within ~10 miles of Porum
Severity Distribution
within ~10 miles of Porum
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Porum, Underground Storage Tanks runs higher than the national average — 36 sites within ~10 miles of Porum. That's not a problem with your land — it's information about 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 Porum
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 Porum average
Your land is one point inside Porum
Everything above resolves to Porum as a whole — one PHZM band and one 28°F frost record, read across 571 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 Porum Average
Porum Average
- ●USDA Zones 7b, averaged across Porum
- ●One soil character for all of Porum
- ●Frost dates read at Porum's scale: Mar 17 to Nov 13
YOUR Parcel
- ✓Your exact zone, not Porum's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Porum
Pull a site-specific report for your exact address in Porum, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Porum averages can't show:
We read public map data around Porum — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Porum average
How we know this about Porum
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 Porum’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 Porum
When does frost risk typically end in Porum?
The last hard freeze (28°F) in Porum typically lands around Mar 17, 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 7.
When is the first frost in Porum?
The first hard freeze (28°F) in Porum 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 241 days after the spring freeze cleared.
How long is the growing season in Porum?
Measured between 28°F hard freezes, Porum sees about 241 frost-free days — roughly Mar 17 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 7 to Oct 30, about 206 days.
Is the soil safe to grow vegetables in Porum?
The federal record around Porum shows 52 documented sites, mostly Underground Storage Tanks entries (36), the nearest Underground Storage Tanks record under a tenth of a mile 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 Porum?
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 Porum's scale — its 7b band and its 241-day season. Your yard writes its own version of Porum'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 Porum’s own scale
6 of the readings below were taken at Porum's own scale — its own ~241-day season between 28°F freezes, the 571 acres it covers and 52 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Porum's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Porum's own 28°F hard-freeze dates, about Mar 17 and Nov 13 and the ~241-day span between themNOAA 1991–2020 Climate Normals
- 52 documented contamination sites on the federal record near Porum, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Porum's boundary and the 571 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~241-day seasonGrowable Ground crop-matching engine
- The ecoregion at Porum's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Porum's 571 acres read through its county's SSURGO summaryfrom Muskogee County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Muskogee 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 Muskogee County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Porum's 571 acreswhy one lot differs from the next →
- Which side of Porum you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 571 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 Porum-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaPorum sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides