Zachary, Louisiana, sits in USDA hardiness zone 9a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — artichoke, fig, california poppy, and cabbage — with any one site's soil, sun, and drainage making the final cut.
Even in Zachary, 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 Zachary 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 Zachary — soil, climate, flood, and parcel records. How we handle your address.
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Zachary — the short answer
Zachary, Louisiana: USDA zone 9a, about 300 days between hard freezes, across 17K acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 7
- East Baton Rouge Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 4
- East Baton Rouge Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~300
- East Baton Rouge Parish normal — NOAA 1991–2020, nearest to this town
- City area
- 17K 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 East Baton Rouge Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Zachary's average, not your lot's — a low corner or a tree line moves it. Against Zachary's 300-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Zachary
Each reading below is measured for Zachary itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsZachary runs about 300 days between hard freezes (read from East Baton Rouge Parish, the closest normal to Zachary) — 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
MeasuredZachary 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 Zachary is in
Zachary sits in the Mississippi Valley Loess Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Zachary's own centroid rather than borrowed from East Baton Rouge Parish.
What Grows in Zachary
Every plant below cleared Zachary's own zone 9a and its 300-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Zachary?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Jan 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 7 (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. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Zachary
Closest first, within ~10 miles of Zachary. Listing isn't leaking, and distance isn't exposure.
- SOLO SVC & RPRBrownfields · 0.9 mi
- T&T LiquorUnderground Storage Tanks · 0.9 mi
- Woodyard Equipment CoUnderground Storage Tanks · 0.9 mi
- J&H Hardwood CoUnderground Storage Tanks · 0.9 mi
- ZACHARY HIGH SCHOOLBrownfields · 0.9 mi
- EB-578BNitrate · 1.0 mi
- EB-578ANitrate · 1.0 mi
- South Central - ZchrlawcUnderground Storage Tanks · 1.1 mi
- ZACHARD FAMILY PRACTICEBrownfields · 1.1 mi
- ZACHARY WATER SYSTEMPFAS · 1.1 mi
- Bayou Blue GroceryUnderground Storage Tanks · 1.2 mi
- Swiftys #14Underground Storage Tanks · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Zachary'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 Zachary.
Sources Checked
within ~10 miles of Zachary
Severity Distribution
within ~10 miles of Zachary
Highest-Severity Sites
Know Before You Grow
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Zachary
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 Zachary average
Your land is one point inside Zachary
Everything above resolves to Zachary as a whole — one PHZM band, read across 17K acres, with hard-freeze dates borrowed from East Baton Rouge 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 Zachary Average
Zachary Average
- ●USDA Zones 9a, averaged across Zachary
- ●One soil character for all of Zachary
- ●Frost dates read at Zachary's scale: Feb 7 to Dec 4
YOUR Parcel
- ✓Your exact zone, not Zachary's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Zachary
Pull a site-specific report for your exact address in Zachary, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Zachary averages can't show:
We read public map data around Zachary — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Zachary average
How we know this about Zachary
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 East Baton Rouge 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 Zachary
When does frost risk typically end in Zachary?
The last hard freeze (28°F) in Zachary typically lands around Feb 7, 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 28.
When is the first frost in Zachary?
The first hard freeze (28°F) in Zachary 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 300 days after the spring freeze cleared.
How long is the growing season in Zachary?
Measured between 28°F hard freezes, Zachary sees about 300 frost-free days — roughly Feb 7 through Dec 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 28 to Nov 20, about 265 days.
Is the soil safe to grow vegetables in Zachary?
The federal record around Zachary runs heavier than most — 595 documented sites, mostly Brownfields entries (235), the nearest Brownfields record about 0.9 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Zachary?
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 Zachary's scale — its 9a band and its 300-day season. Your yard writes its own version of Zachary'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 Zachary’s own scale
5 of the readings below were taken at Zachary's own scale — the 17,190 acres it covers and 595 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Zachary's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 595 documented contamination sites on the federal record near Zachary, the closest Brownfields record about 0.9 miles out from the town centreFederal environmental registers
- Zachary's boundary and the 17,190 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~300-day seasonGrowable Ground crop-matching engine
- The ecoregion at Zachary's own centroid, the Mississippi Valley Loess PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Zachary has no normal of its own, so its county's is the closest measured readfrom East Baton Rouge Parish
- Soil character — no town-scale survey exists, so Zachary's 17,190 acres read through its county's SSURGO summaryfrom East Baton Rouge County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom East Baton Rouge 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 East Baton Rouge County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Zachary's 17,190 acreswhy one lot differs from the next →
- Which side of Zachary you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 17,190 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.9 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 Zachary-wide figureread your own land →
More in Louisiana
Wider growing context
What grows across LouisianaZachary sits outside our named growing regions, so Louisiana as a whole is its closest context here.
Nearby growing guides