Hartman, Arkansas, sits in USDA hardiness zone 8a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Hartman, 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 Hartman 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 Hartman — soil, climate, flood, and parcel records. How we handle your address.
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Hartman — the short answer
Hartman, Arkansas: USDA zone 8a, about 252 days between hard freezes, across 1K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 12
- 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
- ~252
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 Hartman's average, not your lot's — a low corner or a tree line moves it. Against Hartman's 252-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hartman
Each reading below is measured for Hartman itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHartman runs about 252 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
MeasuredHartman 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 Hartman is in
Hartman sits in the Arkansas Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hartman's own centroid, and it is not what its county reads: Johnson County is mostly Boston Mountains. The wider page above you is answering a different question about different ground.
What Grows in Hartman
Every plant below cleared Hartman's own zone 8a and its 252-day season. Each card opens that plant's Arkansas profile. How we score.
Is it too late to plant in Hartman?
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 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 12 (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 Hartman
Closest first, within ~10 miles of Hartman. Listing isn't leaking, and distance isn't exposure.
- WESTSIDE ELEMENTARY SCHOOLUnderground Storage Tanks · 0.6 mi
- HARTMAN, CITY OFUnderground Storage Tanks · 0.8 mi
- AUNT B'S NEST LLCUnderground Storage Tanks · 0.9 mi
- PEFFLEY, JOHNUnderground Storage Tanks · 1.5 mi
- DOLLAR GENERAL #17958Underground Storage Tanks · 1.5 mi
- HARTMAN WATERWORKSPFAS · 1.7 mi
- 09N25W27BDD1Nitrate · 1.9 mi
- RIVER VALLEY TRACTOR CO.Underground Storage Tanks · 2.1 mi
- CARTER, LOISUnderground Storage Tanks · 2.1 mi
- 09N24W30BCB1Nitrate · 2.2 mi
- 09N25W25DCB1Nitrate · 2.2 mi
- VILLAGE MARKETUnderground Storage Tanks · 2.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hartman'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 Hartman.
Total Sites
238
within ~10 miles of Hartman
Risk Level
Elevated
Highest-severity
12 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Hartman
Severity Distribution
within ~10 miles of Hartman
A note from Gnorman
What an experienced grower watches for around here
In and around Hartman, Nitrate runs higher than the national average — 108 sites within ~10 miles of Hartman. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Hartman
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 Hartman average
Your land is one point inside Hartman
Everything above resolves to Hartman as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Hartman Average
Hartman Average
- ●USDA Zones 8a, averaged across Hartman
- ●One soil character for all of Hartman
- ●Frost dates read at Hartman's scale: Mar 12 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Hartman's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hartman
Pull a site-specific report for your exact address in Hartman, Arkansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hartman averages can't show:
We read public map data around Hartman — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hartman average
How we know this about Hartman
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 Hartman’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 Hartman
When does frost risk typically end in Hartman?
The last hard freeze (28°F) in Hartman typically lands around Mar 12, 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 2.
When is the first frost in Hartman?
The first hard freeze (28°F) in Hartman 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 252 days after the spring freeze cleared.
How long is the growing season in Hartman?
Measured between 28°F hard freezes, Hartman sees about 252 frost-free days — roughly Mar 12 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 2 to Nov 5, about 217 days.
Is the soil safe to grow vegetables in Hartman?
The federal record around Hartman is a meaningful one — 238 documented sites, mostly Nitrate entries (108), the nearest Underground Storage Tanks record about 0.6 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 Hartman?
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 Hartman's scale — its 8a band and its 252-day season. Your yard writes its own version of Hartman'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 Hartman’s own scale
6 of the readings below were taken at Hartman's own scale — its own ~252-day season between 28°F freezes, the 1,011 acres it covers and 238 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hartman's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Hartman's own 28°F hard-freeze dates, about Mar 12 and Nov 19 and the ~252-day span between themNOAA 1991–2020 Climate Normals
- 238 documented contamination sites on the federal record near Hartman, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Hartman's boundary and the 1,011 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~252-day seasonGrowable Ground crop-matching engine
- Hartman sits in the Arkansas Valley — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hartman's 1,011 acres read through its county's SSURGO summaryfrom Johnson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Johnson 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 Johnson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hartman's 1,011 acreswhy one lot differs from the next →
- Which side of Hartman you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,011 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 Hartman-wide figureread your own land →
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