Custer City, Oklahoma, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
On paper, cabbage, prickly pear, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Custer City, 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 Custer City 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 Custer City — soil, climate, flood, and parcel records. How we handle your address.
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Custer City — the short answer
Custer City, Oklahoma: USDA zone 7b, about 233 days between hard freezes, across 388 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 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~233
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 388 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 Custer City's average, not your lot's — a low corner or a tree line moves it. Against Custer City's 233-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Custer City
Each reading below is measured for Custer City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCuster City runs about 233 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
MeasuredCuster City 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 Custer City is in
Custer City sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Custer City's own centroid rather than borrowed from Custer County.
What Grows in Custer City
Every plant below cleared Custer City's own zone 7b and its 233-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Custer City?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 11 — 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 Custer City
Closest first, within ~10 miles of Custer City. Listing isn't leaking, and distance isn't exposure.
- Farmers Cooperative of Western OklahomaUnderground Storage Tanks · 650 ft
- Custer Kwik ShopUnderground Storage Tanks · 1600 ft
- ONEOK OGT - CUSTER JUNCTIONBrownfields · 0.6 mi
- 14N-16W-34 AAAA 1, OW-2Nitrate · 0.8 mi
- Harvey & Doris FergusonUnderground Storage Tanks · 0.9 mi
- 14N-16W-34 BBB 1Nitrate · 1.0 mi
- Fac. Name: Finisher, Well No. 1Nitrate · 2.6 mi
- 5-D Swine, Inc.Nitrate · 2.7 mi
- Fac. Name: Finisher, Well No. 2Nitrate · 2.7 mi
- Fac. Name: Finisher, Well No. 3Nitrate · 2.7 mi
- Harold MillerUnderground Storage Tanks · 2.8 mi
- Darrell MosburgUnderground Storage Tanks · 3.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Custer City'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 Custer City.
Total Sites
85
within ~10 miles of Custer City
Risk Level
Moderate
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Custer City
Severity Distribution
within ~10 miles of Custer City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Custer City, two things run higher than the national average within ~10 miles of Custer City — Underground Storage Tanks (59 sites) and Nitrate (22 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Custer City
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 Custer City average
Your land is one point inside Custer City
Everything above resolves to Custer City as a whole — one PHZM band and one 28°F frost record, read across 388 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 Custer City Average
Custer City Average
- ●USDA Zones 7b, averaged across Custer City
- ●One soil character for all of Custer City
- ●Frost dates read at Custer City's scale: Mar 23 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Custer City's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Custer City
Pull a site-specific report for your exact address in Custer City, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Custer City averages can't show:
We read public map data around Custer City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Custer City average
How we know this about Custer City
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 Custer City’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 Custer City
When does frost risk typically end in Custer City?
The last hard freeze (28°F) in Custer City 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 Custer City?
The first hard freeze (28°F) in Custer City typically arrives around Nov 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 28, so the watching starts about Oct 12 — about 233 days after the spring freeze cleared.
How long is the growing season in Custer City?
Measured between 28°F hard freezes, Custer City sees about 233 frost-free days — roughly Mar 23 through Nov 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 13 to Oct 28, about 198 days.
Is the soil safe to grow vegetables in Custer City?
The federal record around Custer City shows 85 documented sites, mostly Underground Storage Tanks entries (59), the nearest Underground Storage Tanks record about 0.1 miles 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 Custer City?
From about Oct 12 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Custer City's scale — its 7b band and its 233-day season. Your yard writes its own version of Custer City'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 Custer City’s own scale
6 of the readings below were taken at Custer City's own scale — its own ~233-day season between 28°F freezes, the 388 acres it covers and 85 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Custer City's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Custer City's own 28°F hard-freeze dates, about Mar 23 and Nov 11 and the ~233-day span between themNOAA 1991–2020 Climate Normals
- 85 documented contamination sites on the federal record near Custer City, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Custer City's boundary and the 388 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~233-day seasonGrowable Ground crop-matching engine
- The ecoregion at Custer City's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Custer City's 388 acres read through its county's SSURGO summaryfrom Custer County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Custer 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 Custer County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Custer City's 388 acreswhy one lot differs from the next →
- Which side of Custer City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 388 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Custer City-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaCuster City sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides