Del City, 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 Del 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 Del 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 Del City — soil, climate, flood, and parcel records. How we handle your address.
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Del City — the short answer
Del City, Oklahoma: USDA zone 7b, about 248 days between hard freezes, across 5K acres of city.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~248
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 5K 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 Del City's average, not your lot's — a low corner or a tree line moves it. Against Del City's 248-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Del City
Each reading below is measured for Del City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDel City runs about 248 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
MeasuredDel 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 Del City is in
Del City sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Del City's own centroid, and it is not what its county reads: Oklahoma County is mostly Cross Timbers. The wider page above you is answering a different question about different ground.
What Grows in Del City
Every plant below cleared Del City's own zone 7b and its 248-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Del City?
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 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 17 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Del City
Closest first, within ~10 miles of Del City. Listing isn't leaking, and distance isn't exposure.
- Dean Rippetoes TexacoUnderground Storage Tanks · 350 ft
- Gilmore StationUnderground Storage Tanks · 550 ft
- Total #4425Underground Storage Tanks · 550 ft
- S'MartUnderground Storage Tanks · 800 ft
- Family MartUnderground Storage Tanks · 1700 ft
- Moes Auto RepairUnderground Storage Tanks · 2200 ft
- 11N-02W-08 CBC 1Nitrate · 2300 ft
- Former Sunnylane APCOUnderground Storage Tanks · 2300 ft
- Express StopUnderground Storage Tanks · 2500 ft
- Sunnylane Petroleum IncUnderground Storage Tanks · 2600 ft
- Sunnylane U-Haul CenterUnderground Storage Tanks · 0.5 mi
- FAMILY DOLLAR # 4652Brownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Del 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 Del City.
Sources Checked
within ~10 miles of Del City
Severity Distribution
within ~10 miles of Del City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Del City, Underground Storage Tanks runs higher than the national average — 1,730 sites within ~10 miles of Del City. 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 Del 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 Del City average
Your land is one point inside Del City
Everything above resolves to Del City as a whole — one PHZM band and one 28°F frost record, read across 5K 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 city 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 Del City Average
Del City Average
- ●USDA Zones 7b, averaged across Del City
- ●One soil character for all of Del City
- ●Frost dates read at Del City's scale: Mar 14 to Nov 17
YOUR Parcel
- ✓Your exact zone, not Del City's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Del City
Pull a site-specific report for your exact address in Del City, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Del City averages can't show:
We read public map data around Del City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Del City average
How we know this about Del City
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Del 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 city grain anywhere on this page — there is no city-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 Del City
When does frost risk typically end in Del City?
The last hard freeze (28°F) in Del City typically lands around Mar 14, 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 4.
When is the first frost in Del City?
The first hard freeze (28°F) in Del City typically arrives around Nov 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 3, so the watching starts about Oct 18 — about 248 days after the spring freeze cleared.
How long is the growing season in Del City?
Measured between 28°F hard freezes, Del City sees about 248 frost-free days — roughly Mar 14 through Nov 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 4 to Nov 3, about 213 days.
Is the soil safe to grow vegetables in Del City?
The federal record around Del City runs heavier than most — 2,702 documented sites, mostly Underground Storage Tanks entries (1,730), the nearest Underground Storage Tanks record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Del City?
From about Oct 18 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 17 (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 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Del City's scale — its 7b band and its 248-day season. Your yard writes its own version of Del 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 Del City’s own scale
6 of the readings below were taken at Del City's own scale — its own ~248-day season between 28°F freezes, the 4,812 acres it covers and 2,702 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Del City's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Del City's own 28°F hard-freeze dates, about Mar 14 and Nov 17 and the ~248-day span between themNOAA 1991–2020 Climate Normals
- 2,702 documented contamination sites on the federal record near Del City, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Del City's boundary and the 4,812 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~248-day seasonGrowable Ground crop-matching engine
- Del City sits in the Central Great Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Del City's 4,812 acres read through its county's SSURGO summaryfrom Oklahoma County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Oklahoma 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 Oklahoma County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Del City's 4,812 acreswhy one lot differs from the next →
- Which side of Del 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 4,812 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 Del City-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaDel City sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides