Frederick, Oklahoma, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Frederick, 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 Frederick 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 Frederick — soil, climate, flood, and parcel records. How we handle your address.
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Frederick — the short answer
Frederick, Oklahoma: USDA zone 8a, about 253 days between hard freezes, across 3K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~253
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 3K 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 8a is Frederick's average, not your lot's — a low corner or a tree line moves it. Against Frederick's 253-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Frederick
Each reading below is measured for Frederick itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFrederick runs about 253 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
MeasuredFrederick sits in USDA hardiness zone 8a.
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 Frederick is in
Frederick sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Frederick's own centroid rather than borrowed from Tillman County.
What Grows in Frederick
Every plant below cleared Frederick's own zone 8a and its 253-day season. Each card opens that plant's Oklahoma profile. How we score.
Is it too late to plant in Frederick?
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 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 19 — 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 Frederick
Closest first, within ~10 miles of Frederick. Listing isn't leaking, and distance isn't exposure.
- Frederick Municipal AirportUnderground Storage Tanks · 0.5 mi
- HENNIGES AUTOMOTIVE OKLAHOMA INCBrownfields · 0.9 mi
- HENNIGES AUTOMOTIVE OKLAHOMA INCToxics Release Inventory · 0.9 mi
- Mangum Oil & GasUnderground Storage Tanks · 2.5 mi
- Farmers Oil 183 Fuel StopUnderground Storage Tanks · 2.5 mi
- Harper's RestaurantUnderground Storage Tanks · 2.7 mi
- Jim's Truck StopUnderground Storage Tanks · 2.7 mi
- Frederick High School - BusUnderground Storage Tanks · 2.9 mi
- DadsUnderground Storage Tanks · 2.9 mi
- Frederick Fuel SiteUnderground Storage Tanks · 2.9 mi
- Street & Sanitation Dept.Underground Storage Tanks · 3.0 mi
- Chickasha Compress & WarehouseUnderground Storage Tanks · 3.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Frederick'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 Frederick.
Total Sites
48
within ~10 miles of Frederick
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Frederick
Severity Distribution
within ~10 miles of Frederick
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Frederick, Underground Storage Tanks runs higher than the national average — 39 sites within ~10 miles of Frederick. 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 Frederick
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 Frederick average
Your land is one point inside Frederick
Everything above resolves to Frederick as a whole — one PHZM band and one 28°F frost record, read across 3K 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 Frederick Average
Frederick Average
- ●USDA Zones 8a, averaged across Frederick
- ●One soil character for all of Frederick
- ●Frost dates read at Frederick's scale: Mar 11 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Frederick's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Frederick
Pull a site-specific report for your exact address in Frederick, Oklahoma — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Frederick averages can't show:
We read public map data around Frederick — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Frederick average
How we know this about Frederick
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 Frederick’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 Frederick
When does frost risk typically end in Frederick?
The last hard freeze (28°F) in Frederick typically lands around Mar 11, 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 1.
When is the first frost in Frederick?
The first hard freeze (28°F) in Frederick typically arrives around Nov 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 5, so the watching starts about Oct 20 — about 253 days after the spring freeze cleared.
How long is the growing season in Frederick?
Measured between 28°F hard freezes, Frederick sees about 253 frost-free days — roughly Mar 11 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 1 to Nov 5, about 218 days.
Is the soil safe to grow vegetables in Frederick?
The federal record around Frederick shows 48 documented sites, mostly Underground Storage Tanks entries (39), the nearest Underground Storage Tanks record about 0.5 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 Frederick?
From about Oct 20 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Frederick's scale — its 8a band and its 253-day season. Your yard writes its own version of Frederick'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 Frederick’s own scale
6 of the readings below were taken at Frederick's own scale — its own ~253-day season between 28°F freezes, the 3,166 acres it covers and 48 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Frederick's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Frederick's own 28°F hard-freeze dates, about Mar 11 and Nov 19 and the ~253-day span between themNOAA 1991–2020 Climate Normals
- 48 documented contamination sites on the federal record near Frederick, the closest Underground Storage Tanks record about 0.5 miles out from the town centreFederal environmental registers
- Frederick's boundary and the 3,166 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~253-day seasonGrowable Ground crop-matching engine
- The ecoregion at Frederick's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Frederick's 3,166 acres read through its county's SSURGO summaryfrom Tillman County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tillman 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 Tillman County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Frederick's 3,166 acreswhy one lot differs from the next →
- Which side of Frederick you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,166 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.5 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 Frederick-wide figureread your own land →
More in Oklahoma
Wider growing context
What grows across OklahomaFrederick sits outside our named growing regions, so Oklahoma as a whole is its closest context here.