Fort Gibson, Oklahoma, sits in USDA hardiness zone 7b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Fort Gibson, 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 Fort Gibson 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 Fort Gibson — soil, climate, flood, and parcel records. How we handle your address.
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Fort Gibson — the short answer
Fort Gibson, Oklahoma: USDA zone 7b, about 240 days between hard freezes, across 9K 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 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~240
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 9K 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 Fort Gibson's average, not your lot's — a low corner or a tree line moves it. Against Fort Gibson's 240-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Fort Gibson
Each reading below is measured for Fort Gibson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFort Gibson runs about 240 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
MeasuredFort Gibson 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 Fort Gibson is in
Fort Gibson sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Fort Gibson's own centroid rather than borrowed from Muskogee County.
What Grows in Fort Gibson
Every plant below cleared Fort Gibson's own zone 7b and its 240-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Fort Gibson?
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 14 — 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 Fort Gibson
Closest first, within ~10 miles of Fort Gibson. Listing isn't leaking, and distance isn't exposure.
- Well Owner Name: WalterNitrate · 0.5 mi
- StaxUnderground Storage Tanks · 1.0 mi
- Harp's Food Store #196Underground Storage Tanks · 1.0 mi
- Former Ft. Gibson GulfUnderground Storage Tanks · 1.1 mi
- SOUTH TEXAS CAN-OKLAHOMA DIVBrownfields · 1.1 mi
- Fort Quick StopUnderground Storage Tanks · 1.1 mi
- SIMMONS METAL CONTA/CAN MFG PLTToxics Release Inventory · 1.2 mi
- REFRESCO US, INC.Toxics Release Inventory · 1.2 mi
- REFRESCO US, INC.Brownfields · 1.2 mi
- Swbt R64123 Fort Gibson CoUnderground Storage Tanks · 1.2 mi
- Hidden Lake FarmUnderground Storage Tanks · 1.3 mi
- Quinton's One StopUnderground Storage Tanks · 1.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Fort Gibson'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 Fort Gibson.
Sources Checked
within ~10 miles of Fort Gibson
Severity Distribution
within ~10 miles of Fort Gibson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Fort Gibson, two things run higher than the national average within ~10 miles of Fort Gibson — Toxics Release Inventory (34 sites) and Underground Storage Tanks (211 sites). That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Fort Gibson
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 Fort Gibson average
Your land is one point inside Fort Gibson
Everything above resolves to Fort Gibson as a whole — one PHZM band and one 28°F frost record, read across 9K 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 Fort Gibson Average
Fort Gibson Average
- ●USDA Zones 7b, averaged across Fort Gibson
- ●One soil character for all of Fort Gibson
- ●Frost dates read at Fort Gibson's scale: Mar 19 to Nov 14
YOUR Parcel
- ✓Your exact zone, not Fort Gibson's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Fort Gibson
Pull a site-specific report for your exact address in Fort Gibson, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Fort Gibson averages can't show:
We read public map data around Fort Gibson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Fort Gibson average
How we know this about Fort Gibson
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 Fort Gibson’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 Fort Gibson
When does frost risk typically end in Fort Gibson?
The last hard freeze (28°F) in Fort Gibson 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 Fort Gibson?
The first hard freeze (28°F) in Fort Gibson typically arrives around Nov 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 31, so the watching starts about Oct 15 — about 240 days after the spring freeze cleared.
How long is the growing season in Fort Gibson?
Measured between 28°F hard freezes, Fort Gibson sees about 240 frost-free days — roughly Mar 19 through Nov 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 9 to Oct 31, about 205 days.
Is the soil safe to grow vegetables in Fort Gibson?
The federal record around Fort Gibson is a meaningful one — 316 documented sites, mostly Underground Storage Tanks entries (211), the nearest Nitrate record about 0.5 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 Fort Gibson?
From about Oct 15 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 14 (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 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Fort Gibson's scale — its 7b band and its 240-day season. Your yard writes its own version of Fort Gibson'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 Fort Gibson’s own scale
6 of the readings below were taken at Fort Gibson's own scale — its own ~240-day season between 28°F freezes, the 8,549 acres it covers and 316 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Fort Gibson's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Fort Gibson's own 28°F hard-freeze dates, about Mar 19 and Nov 14 and the ~240-day span between themNOAA 1991–2020 Climate Normals
- 316 documented contamination sites on the federal record near Fort Gibson, the closest Nitrate record about 0.5 miles out from the town centreFederal environmental registers
- Fort Gibson's boundary and the 8,549 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~240-day seasonGrowable Ground crop-matching engine
- The ecoregion at Fort Gibson's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Fort Gibson's 8,549 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 Fort Gibson's 8,549 acreswhy one lot differs from the next →
- Which side of Fort Gibson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,549 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.5 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 Fort Gibson-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaFort Gibson sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides