Avant, Oklahoma, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — cabbage, hazelnut, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Avant, 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 Avant 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 Avant — soil, climate, flood, and parcel records. How we handle your address.
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Avant — the short answer
Avant, Oklahoma: USDA zone 7a, about 239 days between hard freezes, across 678 acres of town.
- USDA zone
- 7a
- 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 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~239
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 678 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 7a is Avant's average, not your lot's — a low corner or a tree line moves it. Against Avant's 239-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Avant
Each reading below is measured for Avant itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAvant runs about 239 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
MeasuredAvant sits in USDA hardiness zone 7a.
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 Avant is in
Avant sits in the Cross Timbers — EPA Level III, inside the wider Great Plains. That is read at Avant's own centroid rather than borrowed from Osage County.
What Grows in Avant
Every plant below cleared Avant's own zone 7a and its 239-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Avant?
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 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 13 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Avant
Closest first, within ~10 miles of Avant. Listing isn't leaking, and distance isn't exposure.
- Avant Public SchoolUnderground Storage Tanks · 1.0 mi
- US ARMY COE BIRCH PROJECT OFFICEBrownfields · 4.2 mi
- 22N-12E-04 AAC 1Nitrate · 5.3 mi
- Hillside Grocery & GasUnderground Storage Tanks · 6.1 mi
- H.B. Howard - Flying H RanchUnderground Storage Tanks · 6.3 mi
- SKIATOOK PWAPFAS · 6.5 mi
- Will's TexacoUnderground Storage Tanks · 6.8 mi
- Birch Project OfficeUnderground Storage Tanks · 7.2 mi
- Ramona Mini MartUnderground Storage Tanks · 7.2 mi
- Ramona Public Works AuthorityUnderground Storage Tanks · 7.5 mi
- Metal Processing CoUnderground Storage Tanks · 7.8 mi
- Osage County Dist #1Underground Storage Tanks · 7.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Avant'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 Avant.
Total Sites
74
within ~10 miles of Avant
Risk Level
Moderate
Highest-severity
5 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Avant
Severity Distribution
within ~10 miles of Avant
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Avant, two things run higher than the national average within ~10 miles of Avant — Underground Storage Tanks (56 sites) and Toxics Release Inventory (5 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.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Avant
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 Avant average
Your land is one point inside Avant
Everything above resolves to Avant as a whole — one PHZM band and one 28°F frost record, read across 678 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 Avant Average
Avant Average
- ●USDA Zones 7a, averaged across Avant
- ●One soil character for all of Avant
- ●Frost dates read at Avant's scale: Mar 19 to Nov 13
YOUR Parcel
- ✓Your exact zone, not Avant's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Avant
Pull a site-specific report for your exact address in Avant, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Avant averages can't show:
We read public map data around Avant — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Avant average
How we know this about Avant
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 Avant’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 Avant
When does frost risk typically end in Avant?
The last hard freeze (28°F) in Avant 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 Avant?
The first hard freeze (28°F) in Avant 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 239 days after the spring freeze cleared.
How long is the growing season in Avant?
Measured between 28°F hard freezes, Avant sees about 239 frost-free days — roughly Mar 19 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 9 to Oct 30, about 204 days.
Is the soil safe to grow vegetables in Avant?
The federal record around Avant shows 74 documented sites, mostly Underground Storage Tanks entries (56), the nearest Underground Storage Tanks record about 1.0 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 Avant?
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 Avant's scale — its 7a band and its 239-day season. Your yard writes its own version of Avant'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 Avant’s own scale
6 of the readings below were taken at Avant's own scale — its own ~239-day season between 28°F freezes, the 678 acres it covers and 74 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Avant's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Avant's own 28°F hard-freeze dates, about Mar 19 and Nov 13 and the ~239-day span between themNOAA 1991–2020 Climate Normals
- 74 documented contamination sites on the federal record near Avant, the closest Underground Storage Tanks record about 1.0 miles out from the town centreFederal environmental registers
- Avant's boundary and the 678 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~239-day seasonGrowable Ground crop-matching engine
- The ecoregion at Avant's own centroid, the Cross TimbersUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Avant's 678 acres read through its county's SSURGO summaryfrom Osage County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Osage 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 Osage County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Avant's 678 acreswhy one lot differs from the next →
- Which side of Avant you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 678 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.0 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 Avant-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaAvant sits outside our named growing regions, so Oklahoma as a whole is its closest context here.