Black Oak, Arkansas, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, fig, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Black Oak, 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 Black Oak 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 Black Oak — soil, climate, flood, and parcel records. How we handle your address.
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Black Oak — the short answer
Black Oak, Arkansas: USDA zone 8a, about 261 days between hard freezes, across 268 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~261
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 268 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 Black Oak's average, not your lot's — a low corner or a tree line moves it. Against Black Oak's 261-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Black Oak
Each reading below is measured for Black Oak itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBlack Oak runs about 261 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredBlack Oak 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 Black Oak is in
Black Oak sits in the Mississippi Alluvial Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Black Oak's own centroid rather than borrowed from Craighead County.
What Grows in Black Oak
Every plant below cleared Black Oak's own zone 8a and its 261-day season. Each card opens that plant's Arkansas profile. How we score.
Is it too late to plant in Black Oak?
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 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 24 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
What's on the federal record near Black Oak
Closest first, within ~10 miles of Black Oak. Listing isn't leaking, and distance isn't exposure.
- BLACK OAK EXXONUnderground Storage Tanks · 1500 ft
- JOHNNY MAYNARDUnderground Storage Tanks · 2.4 mi
- BILL'S SOUTHLAND 66 STATIONUnderground Storage Tanks · 3.2 mi
- CRAIGHEAD COUNTY HWY DEPTUnderground Storage Tanks · 3.2 mi
- GTE LAKE CITY - COUnderground Storage Tanks · 3.8 mi
- MONETTE CONOCOUnderground Storage Tanks · 3.9 mi
- JACKSON BROS. EXXONUnderground Storage Tanks · 4.0 mi
- FLASH MARKET #47Underground Storage Tanks · 4.0 mi
- JORDANS #17Underground Storage Tanks · 4.0 mi
- 15N07E28DDD1Nitrate · 4.1 mi
- RIVERSIDE SCHOOL DIST. EASTUnderground Storage Tanks · 4.1 mi
- RIVERSIDE SCHOOLS DIST. WESTUnderground Storage Tanks · 4.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Black Oak'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 Black Oak.
Total Sites
76
within ~10 miles of Black Oak
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Black Oak
Severity Distribution
within ~10 miles of Black Oak
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Black Oak, Nitrate runs higher than the national average — 38 sites within ~10 miles of Black Oak. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Black Oak
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 Black Oak average
Your land is one point inside Black Oak
Everything above resolves to Black Oak as a whole — one PHZM band and one 28°F frost record, read across 268 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 Black Oak Average
Black Oak Average
- ●USDA Zones 8a, averaged across Black Oak
- ●One soil character for all of Black Oak
- ●Frost dates read at Black Oak's scale: Mar 8 to Nov 24
YOUR Parcel
- ✓Your exact zone, not Black Oak's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Black Oak
Pull a site-specific report for your exact address in Black Oak, Arkansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Black Oak averages can't show:
We read public map data around Black Oak — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Black Oak average
How we know this about Black Oak
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 Black Oak’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 Black Oak
When does frost risk typically end in Black Oak?
The last hard freeze (28°F) in Black Oak typically lands around Mar 8, 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 Mar 29.
When is the first frost in Black Oak?
The first hard freeze (28°F) in Black Oak typically arrives around Nov 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 10, so the watching starts about Oct 25 — about 261 days after the spring freeze cleared.
How long is the growing season in Black Oak?
Measured between 28°F hard freezes, Black Oak sees about 261 frost-free days — roughly Mar 8 through Nov 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 29 to Nov 10, about 226 days.
Is the soil safe to grow vegetables in Black Oak?
The federal record around Black Oak shows 76 documented sites, mostly Nitrate entries (38), the nearest Underground Storage Tanks record about 0.3 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 Black Oak?
From about Oct 25 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Black Oak's scale — its 8a band and its 261-day season. Your yard writes its own version of Black Oak'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 Black Oak’s own scale
6 of the readings below were taken at Black Oak's own scale — its own ~261-day season between 28°F freezes, the 268 acres it covers and 76 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Black Oak's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Black Oak's own 28°F hard-freeze dates, about Mar 8 and Nov 24 and the ~261-day span between themNOAA 1991–2020 Climate Normals
- 76 documented contamination sites on the federal record near Black Oak, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Black Oak's boundary and the 268 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~261-day seasonGrowable Ground crop-matching engine
- The ecoregion at Black Oak's own centroid, the Mississippi Alluvial PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Black Oak's 268 acres read through its county's SSURGO summaryfrom Craighead County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Craighead County
- The growing challenges every Arkansas grower plans around — written at state scale, so they stay on the state guidefrom Arkansas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Craighead County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Black Oak's 268 acreswhy one lot differs from the next →
- Which side of Black Oak you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 268 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Black Oak-wide figureread your own land →
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