Kilbourne, Louisiana, sits in USDA hardiness zone 8b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Among the crops suited to this profile: cabbage, fig, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Kilbourne, 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 Kilbourne 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 Kilbourne — soil, climate, flood, and parcel records. How we handle your address.
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Kilbourne — the short answer
Kilbourne, Louisiana: USDA zone 8b, about 283 days between hard freezes, across 887 acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 18
- West Carroll Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 28
- West Carroll Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~283
- West Carroll Parish normal — NOAA 1991–2020, nearest to this town
- Town area
- 887 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 West Carroll Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Kilbourne's average, not your lot's — a low corner or a tree line moves it. Against Kilbourne's 283-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kilbourne
Each reading below is measured for Kilbourne itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsKilbourne runs about 283 days between hard freezes (read from West Carroll Parish, the closest normal to Kilbourne) — 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
MeasuredKilbourne 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 Kilbourne is in
Kilbourne sits in the Mississippi Alluvial Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Kilbourne's own centroid rather than borrowed from West Carroll Parish.
What Grows in Kilbourne
Every plant below cleared Kilbourne's own zone 8b and its 283-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Kilbourne?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 28 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Kilbourne
Closest first, within ~10 miles of Kilbourne. Listing isn't leaking, and distance isn't exposure.
- Kilbourne Deli-Mart LLCUnderground Storage Tanks · 500 ft
- Kilbourne ExxonUnderground Storage Tanks · 600 ft
- B&M Auto SupplyUnderground Storage Tanks · 600 ft
- DOLLAR GENERAL #21091Brownfields · 600 ft
- P&R GroceryUnderground Storage Tanks · 700 ft
- WC-3Nitrate · 1200 ft
- KILBOURNE HIGH SCHOOLBrownfields · 2100 ft
- JUGHEAD'S BOOT LEGGINUnderground Storage Tanks · 0.6 mi
- WC-92Nitrate · 0.8 mi
- S. E. AR FARMER'S ASSNUnderground Storage Tanks · 1.0 mi
- PIONEER OIL COMPANY #229Underground Storage Tanks · 1.0 mi
- WC-5024ZNitrate · 1.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kilbourne'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 Kilbourne.
Sources Checked
within ~10 miles of Kilbourne
Severity Distribution
within ~10 miles of Kilbourne
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kilbourne, Nitrate runs higher than the national average — 64 sites within ~10 miles of Kilbourne. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Kilbourne
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 Kilbourne average
Your land is one point inside Kilbourne
Everything above resolves to Kilbourne as a whole — one PHZM band, read across 887 acres, with hard-freeze dates borrowed from West Carroll 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 Kilbourne Average
Kilbourne Average
- ●USDA Zones 8b, averaged across Kilbourne
- ●One soil character for all of Kilbourne
- ●Frost dates read at Kilbourne's scale: Feb 18 to Nov 28
YOUR Parcel
- ✓Your exact zone, not Kilbourne's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kilbourne
Pull a site-specific report for your exact address in Kilbourne, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kilbourne averages can't show:
We read public map data around Kilbourne — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kilbourne average
How we know this about Kilbourne
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 West Carroll 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 Kilbourne
When does frost risk typically end in Kilbourne?
The last hard freeze (28°F) in Kilbourne 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 Kilbourne?
The first hard freeze (28°F) in Kilbourne typically arrives around Nov 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 14, so the watching starts about Oct 29 — about 283 days after the spring freeze cleared.
How long is the growing season in Kilbourne?
Measured between 28°F hard freezes, Kilbourne sees about 283 frost-free days — roughly Feb 18 through Nov 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 11 to Nov 14, about 248 days.
Is the soil safe to grow vegetables in Kilbourne?
The federal record around Kilbourne shows 103 documented sites, mostly Nitrate entries (64), the nearest Underground Storage Tanks record under a tenth of a mile 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 Kilbourne?
From about Oct 29 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kilbourne's scale — its 8b band and its 283-day season. Your yard writes its own version of Kilbourne'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 Kilbourne’s own scale
5 of the readings below were taken at Kilbourne's own scale — the 887 acres it covers and 103 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Kilbourne's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 103 documented contamination sites on the federal record near Kilbourne, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Kilbourne's boundary and the 887 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~283-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kilbourne's own centroid, the Mississippi Alluvial PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Kilbourne has no normal of its own, so its county's is the closest measured readfrom West Carroll Parish
- Soil character — no town-scale survey exists, so Kilbourne's 887 acres read through its county's SSURGO summaryfrom West Carroll County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom West Carroll 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 West Carroll County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kilbourne's 887 acreswhy one lot differs from the next →
- Which side of Kilbourne you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 887 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Kilbourne-wide figureread your own land →
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