Maringouin, Louisiana, sits in USDA hardiness zone 9a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Maringouin, 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 Maringouin 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 Maringouin — soil, climate, flood, and parcel records. How we handle your address.
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Maringouin — the short answer
Maringouin, Louisiana: USDA zone 9a, about 309 days between hard freezes, across 472 acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 1
- Iberville Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 7
- Iberville Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~309
- Iberville Parish normal — NOAA 1991–2020, nearest to this town
- Town area
- 472 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 Iberville Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Maringouin's average, not your lot's — a low corner or a tree line moves it. Against Maringouin's 309-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Maringouin
Each reading below is measured for Maringouin itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsMaringouin runs about 309 days between hard freezes (read from Iberville Parish, the closest normal to Maringouin) — 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
MeasuredMaringouin 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 Maringouin is in
Maringouin sits in the Mississippi Alluvial Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Maringouin's own centroid rather than borrowed from Iberville Parish.
What Grows in Maringouin
Every plant below cleared Maringouin's own zone 9a and its 309-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Maringouin?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Jan 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 7 — 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 Maringouin
Closest first, within ~10 miles of Maringouin. Listing isn't leaking, and distance isn't exposure.
- LADOTD - I-10 EAST & WEST OVER WHISKEY BAY PILOT CHANNELBrownfields · 150 ft
- Ib-198Nitrate · 250 ft
- Randy's Full ServiceUnderground Storage Tanks · 250 ft
- Farmers Feed & MillUnderground Storage Tanks · 350 ft
- ABC Auto ServiceUnderground Storage Tanks · 600 ft
- Jr MartUnderground Storage Tanks · 650 ft
- Ib-9Nitrate · 750 ft
- DOLLAR GENERAL 11322Brownfields · 800 ft
- Ib-29Nitrate · 800 ft
- Kimball Oil Co IncUnderground Storage Tanks · 1000 ft
- Closed Service StationUnderground Storage Tanks · 1400 ft
- ACTION RESOURCES CLEANUPBrownfields · 1600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Maringouin'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 Maringouin.
Total Sites
196
within ~10 miles of Maringouin
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Maringouin
Severity Distribution
within ~10 miles of Maringouin
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Maringouin, Nitrate runs higher than the national average — 90 sites within ~10 miles of Maringouin. 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 Maringouin
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 Maringouin average
Your land is one point inside Maringouin
Everything above resolves to Maringouin as a whole — one PHZM band, read across 472 acres, with hard-freeze dates borrowed from Iberville 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 Maringouin Average
Maringouin Average
- ●USDA Zones 9a, averaged across Maringouin
- ●One soil character for all of Maringouin
- ●Frost dates read at Maringouin's scale: Feb 1 to Dec 7
YOUR Parcel
- ✓Your exact zone, not Maringouin's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Maringouin
Pull a site-specific report for your exact address in Maringouin, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Maringouin averages can't show:
We read public map data around Maringouin — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Maringouin average
How we know this about Maringouin
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 Iberville 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 Maringouin
When does frost risk typically end in Maringouin?
The last hard freeze (28°F) in Maringouin typically lands around Feb 1, 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 Feb 22.
When is the first frost in Maringouin?
The first hard freeze (28°F) in Maringouin typically arrives around Dec 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 23, so the watching starts about Nov 7 — about 309 days after the spring freeze cleared.
How long is the growing season in Maringouin?
Measured between 28°F hard freezes, Maringouin sees about 309 frost-free days — roughly Feb 1 through Dec 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 22 to Nov 23, about 274 days.
Is the soil safe to grow vegetables in Maringouin?
The federal record around Maringouin shows 196 documented sites, mostly Nitrate entries (90), the nearest Brownfields 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 Maringouin?
From about Nov 7 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Maringouin's scale — its 9a band and its 309-day season. Your yard writes its own version of Maringouin'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 Maringouin’s own scale
5 of the readings below were taken at Maringouin's own scale — the 472 acres it covers and 196 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Maringouin's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 196 documented contamination sites on the federal record near Maringouin, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Maringouin's boundary and the 472 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~309-day seasonGrowable Ground crop-matching engine
- The ecoregion at Maringouin's own centroid, the Mississippi Alluvial PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Maringouin has no normal of its own, so its county's is the closest measured readfrom Iberville Parish
- Soil character — no town-scale survey exists, so Maringouin's 472 acres read through its county's SSURGO summaryfrom Iberville County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Iberville 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 Iberville County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Maringouin's 472 acreswhy one lot differs from the next →
- Which side of Maringouin you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 472 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Maringouin-wide figureread your own land →
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