Leonard, Oklahoma, sits in USDA hardiness zone 7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
The conditions favor cabbage, prickly pear, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Leonard, 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 Leonard 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 Leonard — soil, climate, flood, and parcel records. How we handle your address.
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Leonard — the short answer
Leonard, Oklahoma: USDA zone 7b, about 242 days between hard freezes, across 966 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 17
- 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
- ~242
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 966 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 Leonard's average, not your lot's — a low corner or a tree line moves it. Against Leonard's 242-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Leonard
Each reading below is measured for Leonard itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLeonard runs about 242 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
MeasuredLeonard 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 Leonard is in
Leonard sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Leonard's own centroid rather than borrowed from Tulsa County.
What Grows in Leonard
Every plant below cleared Leonard's own zone 7b and its 242-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Leonard?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 17; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 17 (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. 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 Leonard
Closest first, within ~10 miles of Leonard. Listing isn't leaking, and distance isn't exposure.
- Leonard Country StoreUnderground Storage Tanks · 700 ft
- Frost Petroleum Equipment, LLCUnderground Storage Tanks · 950 ft
- Indian Springs CcUnderground Storage Tanks · 3.2 mi
- Indian Springs Service StationUnderground Storage Tanks · 3.5 mi
- Jim's One StopUnderground Storage Tanks · 3.5 mi
- Minute StopUnderground Storage Tanks · 3.6 mi
- Willow Springs Fruit FarmUnderground Storage Tanks · 3.7 mi
- B&M Station (Texaco)Underground Storage Tanks · 3.9 mi
- Wayne McclainUnderground Storage Tanks · 3.9 mi
- Bixby Public School TransportationUnderground Storage Tanks · 3.9 mi
- Circle K #2658Underground Storage Tanks · 4.0 mi
- Dean B KnightUnderground Storage Tanks · 4.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Leonard'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 Leonard.
Total Sites
382
within ~10 miles of Leonard
Risk Level
Elevated
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Leonard
Severity Distribution
within ~10 miles of Leonard
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Leonard, Toxics Release Inventory runs higher than the national average — 24 sites within ~10 miles of Leonard. 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.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Leonard
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 Leonard average
Your land is one point inside Leonard
Everything above resolves to Leonard as a whole — one PHZM band and one 28°F frost record, read across 966 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 Leonard Average
Leonard Average
- ●USDA Zones 7b, averaged across Leonard
- ●One soil character for all of Leonard
- ●Frost dates read at Leonard's scale: Mar 17 to Nov 14
YOUR Parcel
- ✓Your exact zone, not Leonard's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Leonard
Pull a site-specific report for your exact address in Leonard, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Leonard averages can't show:
We read public map data around Leonard — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Leonard average
How we know this about Leonard
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 Leonard’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 Leonard
When does frost risk typically end in Leonard?
The last hard freeze (28°F) in Leonard typically lands around Mar 17, 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 7.
When is the first frost in Leonard?
The first hard freeze (28°F) in Leonard 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 242 days after the spring freeze cleared.
How long is the growing season in Leonard?
Measured between 28°F hard freezes, Leonard sees about 242 frost-free days — roughly Mar 17 through Nov 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 7 to Oct 31, about 207 days.
Is the soil safe to grow vegetables in Leonard?
The federal record around Leonard is a meaningful one — 382 documented sites, mostly Underground Storage Tanks entries (221), the nearest Underground Storage Tanks record about 0.1 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 Leonard?
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 Leonard's scale — its 7b band and its 242-day season. Your yard writes its own version of Leonard'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 Leonard’s own scale
6 of the readings below were taken at Leonard's own scale — its own ~242-day season between 28°F freezes, the 966 acres it covers and 382 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Leonard's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Leonard's own 28°F hard-freeze dates, about Mar 17 and Nov 14 and the ~242-day span between themNOAA 1991–2020 Climate Normals
- 382 documented contamination sites on the federal record near Leonard, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Leonard's boundary and the 966 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~242-day seasonGrowable Ground crop-matching engine
- The ecoregion at Leonard's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Leonard's 966 acres read through its county's SSURGO summaryfrom Tulsa County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tulsa 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 Tulsa County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Leonard's 966 acreswhy one lot differs from the next →
- Which side of Leonard you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 966 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 Leonard-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaLeonard sits outside our named growing regions, so Oklahoma as a whole is its closest context here.
Nearby growing guides