Morgan City, Louisiana, sits in USDA hardiness zone 9b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Among the crops suited to this profile: okra, meyer lemon, california poppy, and artichoke. The site-level story — soil, sun, drainage — decides the rest.
Even in Morgan City, 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 Morgan City 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 Morgan City — soil, climate, flood, and parcel records. How we handle your address.
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Morgan City — the short answer
Morgan City, Louisiana: USDA zone 9b, about 325 days between hard freezes, across 4K acres of city.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 24
- St. Mary Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 15
- St. Mary Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~325
- St. Mary Parish normal — NOAA 1991–2020, nearest to this town
- City area
- 4K 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 St. Mary Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Morgan City's average, not your lot's — a low corner or a tree line moves it. Against Morgan City's 325-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Morgan City
Each reading below is measured for Morgan City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsMorgan City runs about 325 days between hard freezes (read from St. Mary Parish, the closest normal to Morgan City) — 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
MeasuredMorgan City sits in USDA hardiness zone 9b.
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 Morgan City is in
Morgan City sits in the Mississippi Alluvial Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Morgan City's own centroid rather than borrowed from St. Mary Parish.
What Grows in Morgan City
Every plant below cleared Morgan City's own zone 9b and its 325-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Morgan City?
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 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 15 — 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 Morgan City
Closest first, within ~10 miles of Morgan City. Listing isn't leaking, and distance isn't exposure.
- Craws & Claws IIIUnderground Storage Tanks · 2200 ft
- RIVER OAKS CANCER CARE CTRBrownfields · 2300 ft
- MORGAN CITY LAB & XRAYBrownfields · 2300 ft
- Victor Ii DeliUnderground Storage Tanks · 0.6 mi
- Victor II ExxonUnderground Storage Tanks · 0.6 mi
- RITE AID PHARMACY #7283Brownfields · 0.6 mi
- OCHSNER MORGAN CITY, LLCBrownfields · 0.6 mi
- HORNBECK OFFSHORE SVCSBrownfields · 0.6 mi
- Teche Regional Medical CenterUnderground Storage Tanks · 0.6 mi
- UNITED MARINE SVC INCBrownfields · 0.6 mi
- WALMART NEIGHBORHOOD MARKET #7099Brownfields · 0.6 mi
- LEEVAC CORPBrownfields · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Morgan City'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 Morgan City.
Total Sites
528
within ~10 miles of Morgan City
Risk Level
Elevated
Highest-severity
28 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Morgan City
Severity Distribution
within ~10 miles of Morgan City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Morgan City, Brownfields runs higher than the national average — 348 sites within ~10 miles of Morgan City. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Morgan City
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 Morgan City average
Your land is one point inside Morgan City
Everything above resolves to Morgan City as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from St. Mary Parish’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 Morgan City Average
Morgan City Average
- ●USDA Zones 9b, averaged across Morgan City
- ●One soil character for all of Morgan City
- ●Frost dates read at Morgan City's scale: Jan 24 to Dec 15
YOUR Parcel
- ✓Your exact zone, not Morgan City's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Morgan City
Pull a site-specific report for your exact address in Morgan City, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Morgan City averages can't show:
We read public map data around Morgan City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Morgan City average
How we know this about Morgan City
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 St. Mary 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 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 Morgan City
When does frost risk typically end in Morgan City?
The last hard freeze (28°F) in Morgan City typically lands around Jan 24, 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 14.
When is the first frost in Morgan City?
The first hard freeze (28°F) in Morgan City typically arrives around Dec 15, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 1, so the watching starts about Nov 15 — about 325 days after the spring freeze cleared.
How long is the growing season in Morgan City?
Measured between 28°F hard freezes, Morgan City sees about 325 frost-free days — roughly Jan 24 through Dec 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 14 to Dec 1, about 290 days.
Is the soil safe to grow vegetables in Morgan City?
The federal record around Morgan City is a meaningful one — 528 documented sites, mostly Brownfields entries (348), the nearest Underground Storage Tanks record about 0.4 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 Morgan City?
From about Nov 15 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 15 (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 15. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Morgan City's scale — its 9b band and its 325-day season. Your yard writes its own version of Morgan City'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 Morgan City’s own scale
5 of the readings below were taken at Morgan City's own scale — the 3,830 acres it covers and 528 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Morgan City's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 528 documented contamination sites on the federal record near Morgan City, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Morgan City's boundary and the 3,830 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~325-day seasonGrowable Ground crop-matching engine
- The ecoregion at Morgan City's own centroid, the Mississippi Alluvial PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Morgan City has no normal of its own, so its county's is the closest measured readfrom St. Mary Parish
- Soil character — no town-scale survey exists, so Morgan City's 3,830 acres read through its county's SSURGO summaryfrom St. Mary County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Mary 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 St. Mary County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Morgan City's 3,830 acreswhy one lot differs from the next →
- Which side of Morgan City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,830 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 Morgan City-wide figureread your own land →