Dill City, Oklahoma, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
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 Dill 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 Dill 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 Dill City — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Dill City — the short answer
Dill City, Oklahoma: USDA zone 7b, about 240 days between hard freezes, across 370 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~240
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 370 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 Dill City's average, not your lot's — a low corner or a tree line moves it. Against Dill City's 240-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Dill City
Each reading below is measured for Dill City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDill City 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
MeasuredDill 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 Dill City is in
Dill City sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Dill City's own centroid rather than borrowed from Washita County.
What Grows in Dill City
Every plant below cleared Dill City'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 Dill City?
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 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 15 — 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 Dill City
Closest first, within ~10 miles of Dill City. Listing isn't leaking, and distance isn't exposure.
- Farmers Union Coop GinUnderground Storage Tanks · 2200 ft
- Washita County Dist #3Underground Storage Tanks · 2200 ft
- Dill City Quick StopUnderground Storage Tanks · 0.7 mi
- Tom J. CowartUnderground Storage Tanks · 2.2 mi
- Donald GrayUnderground Storage Tanks · 2.7 mi
- 10N-18W-19 CDC 1Nitrate · 2.9 mi
- Well Owner Name: JodyNitrate · 3.7 mi
- Claude & Airlene RingoUnderground Storage Tanks · 4.7 mi
- Dill City Public SchoolUnderground Storage Tanks · 4.8 mi
- Little ShopUnderground Storage Tanks · 4.8 mi
- ENOGEX GAS GATHERIN/BURNS FLAT SOUTH CMPSR SBrownfields · 4.9 mi
- Farmers Coop Burns FlatUnderground Storage Tanks · 5.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Dill 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 Dill City.
Total Sites
92
within ~10 miles of Dill City
Risk Level
Moderate
Highest-severity
3 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Dill City
Severity Distribution
within ~10 miles of Dill City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Dill City, Underground Storage Tanks runs higher than the national average — 63 sites within ~10 miles of Dill City. 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.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Dill 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 Dill City average
Your land is one point inside Dill City
Everything above resolves to Dill City as a whole — one PHZM band and one 28°F frost record, read across 370 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 Dill City Average
Dill City Average
- ●USDA Zones 7b, averaged across Dill City
- ●One soil character for all of Dill City
- ●Frost dates read at Dill City's scale: Mar 20 to Nov 15
YOUR Parcel
- ✓Your exact zone, not Dill City's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Dill City
Pull a site-specific report for your exact address in Dill City, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Dill City averages can't show:
We read public map data around Dill City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Dill City average
How we know this about Dill 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 Dill 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 Dill City
When does frost risk typically end in Dill City?
The last hard freeze (28°F) in Dill City typically lands around Mar 20, 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 10.
When is the first frost in Dill City?
The first hard freeze (28°F) in Dill City typically arrives around Nov 15, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 1, so the watching starts about Oct 16 — about 240 days after the spring freeze cleared.
How long is the growing season in Dill City?
Measured between 28°F hard freezes, Dill City sees about 240 frost-free days — roughly Mar 20 through Nov 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 10 to Nov 1, about 205 days.
Is the soil safe to grow vegetables in Dill City?
The federal record around Dill City shows 92 documented sites, mostly Underground Storage Tanks entries (63), the nearest Underground Storage Tanks record about 0.4 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 Dill City?
From about Oct 16 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 15 (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 15. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Dill City's scale — its 7b band and its 240-day season. Your yard writes its own version of Dill 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 Dill City’s own scale
6 of the readings below were taken at Dill City's own scale — its own ~240-day season between 28°F freezes, the 370 acres it covers and 92 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Dill City's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Dill City's own 28°F hard-freeze dates, about Mar 20 and Nov 15 and the ~240-day span between themNOAA 1991–2020 Climate Normals
- 92 documented contamination sites on the federal record near Dill City, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Dill City's boundary and the 370 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 Dill 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 Dill City's 370 acres read through its county's SSURGO summaryfrom Washita County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washita 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 Washita County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Dill City's 370 acreswhy one lot differs from the next →
- Which side of Dill 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 370 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Dill City-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaDill City sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides