Kirbyville, Texas, sits in USDA hardiness zone 9a — a zone band wide enough that plant choice, not possibility, is the interesting question.
The conditions favor artichoke, fig, california poppy, and cabbage, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Kirbyville, 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 Kirbyville 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 Kirbyville — soil, climate, flood, and parcel records. How we handle your address.
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Kirbyville — the short answer
Kirbyville, Texas: USDA zone 9a, about 299 days between hard freezes, across 2K acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 8
- Jasper County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 4
- Jasper County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~299
- Jasper County normal — NOAA 1991–2020, nearest to this town
- City 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 Jasper County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Kirbyville's average, not your lot's — a low corner or a tree line moves it. Against Kirbyville's 299-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kirbyville
Each reading below is measured for Kirbyville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsKirbyville runs about 299 days between hard freezes (read from Jasper County, the closest normal to Kirbyville) — 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
MeasuredKirbyville sits in USDA hardiness zone 9a.
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 Kirbyville is in
Kirbyville sits in the South Central Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Kirbyville's own centroid rather than borrowed from Jasper County.
What Grows in Kirbyville
Every plant below cleared Kirbyville's own zone 9a and its 299-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Kirbyville?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Jan 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 4 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Kirbyville
Closest first, within ~10 miles of Kirbyville. Listing isn't leaking, and distance isn't exposure.
- STOP AND STAYUnderground Storage Tanks · 1900 ft
- ROGERS TEXACOUnderground Storage Tanks · 1900 ft
- JASPER-NEWTON ELECTRIC COOPERATIVEUnderground Storage Tanks · 2000 ft
- KIRBYVILLE FUEL STOPUnderground Storage Tanks · 2000 ft
- BEAN MOTORUnderground Storage Tanks · 2000 ft
- SERVICE STATIONUnderground Storage Tanks · 2000 ft
- B & K GULFUnderground Storage Tanks · 2100 ft
- ELLIS TRUCK & TRAILERBrownfields · 2100 ft
- KIRBYVILLE SHELLUnderground Storage Tanks · 2200 ft
- JENNYS FRIED CHICKENUnderground Storage Tanks · 2300 ft
- SUNSHINE GROCERY KIRBYVILLEUnderground Storage Tanks · 2400 ft
- BROOKSHIRE BROTHERS 53Underground Storage Tanks · 2400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Kirbyville'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 Kirbyville.
Sources Checked
within ~10 miles of Kirbyville
Severity Distribution
within ~10 miles of Kirbyville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kirbyville, Underground Storage Tanks runs higher than the national average — 108 sites within ~10 miles of Kirbyville. 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 Kirbyville
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 Kirbyville average
Your land is one point inside Kirbyville
Everything above resolves to Kirbyville as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Jasper County’s record because no 30-year normal resolves at this city’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 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 Kirbyville Average
Kirbyville Average
- ●USDA Zones 9a, averaged across Kirbyville
- ●One soil character for all of Kirbyville
- ●Frost dates read at Kirbyville's scale: Feb 8 to Dec 4
YOUR Parcel
- ✓Your exact zone, not Kirbyville's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kirbyville
Pull a site-specific report for your exact address in Kirbyville, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kirbyville averages can't show:
We read public map data around Kirbyville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kirbyville average
How we know this about Kirbyville
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 Jasper County’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 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 Kirbyville
When does frost risk typically end in Kirbyville?
The last hard freeze (28°F) in Kirbyville typically lands around Feb 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 1.
When is the first frost in Kirbyville?
The first hard freeze (28°F) in Kirbyville typically arrives around Dec 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 20, so the watching starts about Nov 4 — about 299 days after the spring freeze cleared.
How long is the growing season in Kirbyville?
Measured between 28°F hard freezes, Kirbyville sees about 299 frost-free days — roughly Feb 8 through Dec 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 1 to Nov 20, about 264 days.
Is the soil safe to grow vegetables in Kirbyville?
The federal record around Kirbyville shows 132 documented sites, mostly Underground Storage Tanks entries (108), the nearest Underground Storage Tanks record about 0.4 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 Kirbyville?
From about Nov 4 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 Dec 4 (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 Dec 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kirbyville's scale — its 9a band and its 299-day season. Your yard writes its own version of Kirbyville'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 Kirbyville’s own scale
5 of the readings below were taken at Kirbyville's own scale — the 1,547 acres it covers and 132 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Kirbyville's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 132 documented contamination sites on the federal record near Kirbyville, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Kirbyville's boundary and the 1,547 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~299-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kirbyville's own centroid, the South Central PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Kirbyville has no normal of its own, so its county's is the closest measured readfrom Jasper County
- Soil character — no town-scale survey exists, so Kirbyville's 1,547 acres read through its county's SSURGO summaryfrom Jasper County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jasper County
- The growing challenges every Texas grower plans around — written at state scale, so they stay on the state guidefrom Texas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Jasper County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kirbyville's 1,547 acreswhy one lot differs from the next →
- Which side of Kirbyville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,547 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Kirbyville-wide figureread your own land →
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