Harrisonburg, Louisiana, sits in USDA hardiness zone 8b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Harrisonburg, 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 Harrisonburg 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 Harrisonburg — soil, climate, flood, and parcel records. How we handle your address.
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Harrisonburg — the short answer
Harrisonburg, Louisiana: USDA zone 8b, about 289 days between hard freezes, across 620 acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 16
- Catahoula Parish normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 2
- Catahoula Parish normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~289
- Catahoula Parish normal — NOAA 1991–2020, nearest to this town
- Town area
- 620 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 Catahoula Parish’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Harrisonburg's average, not your lot's — a low corner or a tree line moves it. Against Harrisonburg's 289-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Harrisonburg
Each reading below is measured for Harrisonburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsHarrisonburg runs about 289 days between hard freezes (read from Catahoula Parish, the closest normal to Harrisonburg) — 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
MeasuredHarrisonburg 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 Harrisonburg is in
Harrisonburg sits in the Mississippi Alluvial Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Harrisonburg's own centroid rather than borrowed from Catahoula Parish.
What Grows in Harrisonburg
Every plant below cleared Harrisonburg's own zone 8b and its 289-day season. Each card opens that plant's Louisiana profile. How we score.
Is it too late to plant in Harrisonburg?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Jan 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 2 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
What's on the federal record near Harrisonburg
Closest first, within ~10 miles of Harrisonburg. Listing isn't leaking, and distance isn't exposure.
- BUNGE CORP BOOK LABrownfields · 800 ft
- JCP Inv LLCUnderground Storage Tanks · 950 ft
- Ct-12Nitrate · 1200 ft
- Ct-8Nitrate · 1200 ft
- Olds AutomotiveUnderground Storage Tanks · 1300 ft
- LADOTD - Harrisonburg Maintenance UnitUnderground Storage Tanks · 2300 ft
- WOMACK AND SONS CONSTRUCTION GROUP LLCBrownfields · 1.0 mi
- The StationUnderground Storage Tanks · 1.2 mi
- Ct-330Nitrate · 2.8 mi
- Ct-18Nitrate · 3.3 mi
- Ct-58Nitrate · 3.7 mi
- Ct-57Nitrate · 3.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Harrisonburg'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 Harrisonburg.
Total Sites
108
within ~10 miles of Harrisonburg
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Harrisonburg
Severity Distribution
within ~10 miles of Harrisonburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Harrisonburg, Nitrate runs higher than the national average — 66 sites within ~10 miles of Harrisonburg. That's not a problem with your land — it's information about 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 Harrisonburg
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 Harrisonburg average
Your land is one point inside Harrisonburg
Everything above resolves to Harrisonburg as a whole — one PHZM band, read across 620 acres, with hard-freeze dates borrowed from Catahoula 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 Harrisonburg Average
Harrisonburg Average
- ●USDA Zones 8b, averaged across Harrisonburg
- ●One soil character for all of Harrisonburg
- ●Frost dates read at Harrisonburg's scale: Feb 16 to Dec 2
YOUR Parcel
- ✓Your exact zone, not Harrisonburg's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Harrisonburg
Pull a site-specific report for your exact address in Harrisonburg, Louisiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Harrisonburg averages can't show:
We read public map data around Harrisonburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Harrisonburg average
How we know this about Harrisonburg
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 Catahoula 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 Harrisonburg
When does frost risk typically end in Harrisonburg?
The last hard freeze (28°F) in Harrisonburg typically lands around Feb 16, 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 9.
When is the first frost in Harrisonburg?
The first hard freeze (28°F) in Harrisonburg typically arrives around Dec 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 18, so the watching starts about Nov 2 — about 289 days after the spring freeze cleared.
How long is the growing season in Harrisonburg?
Measured between 28°F hard freezes, Harrisonburg sees about 289 frost-free days — roughly Feb 16 through Dec 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 9 to Nov 18, about 254 days.
Is the soil safe to grow vegetables in Harrisonburg?
The federal record around Harrisonburg is a meaningful one — 108 documented sites, mostly Nitrate entries (66), the nearest Brownfields record about 0.1 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 Harrisonburg?
From about Nov 2 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 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Harrisonburg's scale — its 8b band and its 289-day season. Your yard writes its own version of Harrisonburg'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 Harrisonburg’s own scale
5 of the readings below were taken at Harrisonburg's own scale — the 620 acres it covers and 108 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Harrisonburg's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 108 documented contamination sites on the federal record near Harrisonburg, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Harrisonburg's boundary and the 620 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~289-day seasonGrowable Ground crop-matching engine
- The ecoregion at Harrisonburg's own centroid, the Mississippi Alluvial PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Harrisonburg has no normal of its own, so its county's is the closest measured readfrom Catahoula Parish
- Soil character — no town-scale survey exists, so Harrisonburg's 620 acres read through its county's SSURGO summaryfrom Catahoula County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Catahoula 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 Catahoula County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Harrisonburg's 620 acreswhy one lot differs from the next →
- Which side of Harrisonburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 620 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.1 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 Harrisonburg-wide figureread your own land →
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