Calhoun, Louisiana, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Calhoun, 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 Calhoun 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 Calhoun — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Calhoun — the short answer
Calhoun, Louisiana: USDA zone 8b, about 284 days between hard freezes, across 2K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 18
- Ouachita Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 29
- Ouachita Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~284
- Ouachita Parish normal — NOAA 1991–2020, nearest to this town
- Town area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Ouachita Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Calhoun's average, not your lot's — a low corner or a tree line moves it. Against Calhoun's 284-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Calhoun
Each reading below is measured for Calhoun itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsCalhoun runs about 284 days between hard freezes (read from Ouachita Parish, the closest normal to Calhoun) — 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
MeasuredCalhoun sits in USDA hardiness zone 8b.
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 Calhoun is in
Calhoun sits in the South Central Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Calhoun's own centroid rather than borrowed from Ouachita Parish.
What Grows in Calhoun
Every plant below cleared Calhoun's own zone 8b and its 284-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Calhoun?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Jan 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 18 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 29 — 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 Calhoun
Closest first, within ~10 miles of Calhoun. Listing isn't leaking, and distance isn't exposure.
- Lil' Joe's Tire & Oil Change IncUnderground Storage Tanks · 1400 ft
- DOLLAR GENERAL #6823Brownfields · 2100 ft
- Stockman's FeedUnderground Storage Tanks · 2200 ft
- Ou-418Nitrate · 2300 ft
- CALHOUN WATER SYSTEMPFAS · 0.6 mi
- Ou-66Nitrate · 0.7 mi
- 101 Travel PlazaUnderground Storage Tanks · 0.7 mi
- Harde Mart #12 - CalhounUnderground Storage Tanks · 0.7 mi
- Stuckey's #34Underground Storage Tanks · 0.7 mi
- Quick Stop GroceryUnderground Storage Tanks · 0.8 mi
- Calhoun Elementary SchoolUnderground Storage Tanks · 0.8 mi
- Ou-442Nitrate · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Calhoun'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 Calhoun.
Total Sites
196
within ~10 miles of Calhoun
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Calhoun
Severity Distribution
within ~10 miles of Calhoun
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Calhoun, Nitrate runs higher than the national average — 72 sites within ~10 miles of Calhoun. 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 Calhoun
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 Calhoun average
Your land is one point inside Calhoun
Everything above resolves to Calhoun as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Ouachita Parish’s record because no 30-year normal resolves at this town’s own centroid. 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 Calhoun Average
Calhoun Average
- ●USDA Zones 8b, averaged across Calhoun
- ●One soil character for all of Calhoun
- ●Frost dates read at Calhoun's scale: Feb 18 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Calhoun's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Calhoun
Pull a site-specific report for your exact address in Calhoun, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Calhoun averages can't show:
We read public map data around Calhoun — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Calhoun average
How we know this about Calhoun
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 Ouachita Parish’s record, because none resolves here; 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 Calhoun
When does frost risk typically end in Calhoun?
The last hard freeze (28°F) in Calhoun typically lands around Feb 18, 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 11.
When is the first frost in Calhoun?
The first hard freeze (28°F) in Calhoun typically arrives around Nov 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 15, so the watching starts about Oct 30 — about 284 days after the spring freeze cleared.
How long is the growing season in Calhoun?
Measured between 28°F hard freezes, Calhoun sees about 284 frost-free days — roughly Feb 18 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 11 to Nov 15, about 249 days.
Is the soil safe to grow vegetables in Calhoun?
The federal record around Calhoun shows 196 documented sites, mostly Underground Storage Tanks entries (78), 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 Calhoun?
From about Oct 30 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 29 (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 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Calhoun's scale — its 8b band and its 284-day season. Your yard writes its own version of Calhoun'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 Calhoun’s own scale
5 of the readings below were taken at Calhoun's own scale — the 1,512 acres it covers and 196 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Calhoun's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 196 documented contamination sites on the federal record near Calhoun, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Calhoun's boundary and the 1,512 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~284-day seasonGrowable Ground crop-matching engine
- The ecoregion at Calhoun's own centroid, the South Central PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Calhoun has no normal of its own, so its county's is the closest measured readfrom Ouachita Parish
- Soil character — no town-scale survey exists, so Calhoun's 1,512 acres read through its county's SSURGO summaryfrom Ouachita County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Ouachita County
- The growing challenges every Louisiana grower plans around — written at state scale, so they stay on the state guidefrom Louisiana
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Ouachita County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Calhoun's 1,512 acreswhy one lot differs from the next →
- Which side of Calhoun you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,512 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 Calhoun-wide figureread your own land →
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