Jackson County, in Mississippi, sits in USDA hardiness zone 9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit pecan, okra, muscadine grape, and magnolia — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Jackson County lies within the Gulf Coast — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring
Jackson County holds more than one microclimate.
Soils and elevations shift across Jackson County, so your frost dates and drainage aren't the county average. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Quick Facts
USDA Zones
9a
Last Frost (state avg.)
Feb 28 - Mar 30
First Frost (state avg.)
Oct 25 - Nov 20
County Area
463K acres
Hardiness Zone Range
Growing Season
Zone maps are averages across Jackson County. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil in Jackson County
Across Jackson County, the ground is predominantly Ultisols, where Benndale, Vancleave, and Bayou are the most extensive named soil series. The soil is generally very poorly drained with a fine sandy loam surface. Topsoil pH runs about 5.0, very strongly acidic. Rainfall drains through hydrologic group C soils.
Soil order
Ultisols
Drainage
Very poorly drained
Prime farmland
28%
Hydric soils
43%
Soil still varies lot by lot — soil types explained.
What Grows in Jackson County
Plants matched to Jackson County's USDA zones 9a — each links to its full growing profile.
Growing Challenges in Mississippi
What an experienced grower plans around here — each one has a move.
Extreme summer heat and humidity
Run the garden on the generous spring and fall windows — and let summer belong to okra, peas, and sweet potatoes.
Heavy alluvial clay in the Delta region
Delta clay is rich but slow to drain — raised rows get roots above the wet while keeping that fertility in reach.
Frequent severe storms and flooding
Site beds on the high ground, mound the rows, and keep water moving — drainage planning is storm insurance.
For cultivar selection, pest pressure, and planting-time guidance specific to Mississippi, the Mississippi State University Extension Service is the authoritative local source.
Safe to Grow Here?
What the federal record shows across Jackson County — and how to grow with it.
We checked the federal record across Jackson County — 964 documented sites across 7 of the 9 source types we track.
The most significant on record: 8 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Jackson County carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Sources Checked
across Jackson County
Severity Distribution
across Jackson County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jackson County, two things run higher than the national average — Nitrate (364 sites) and PFAS (9 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Jackson County
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
Jackson County Average
- ●USDA Zones 9a
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Jackson County
Pull a site-specific report for your exact address in Jackson County, Mississippi — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for Jackson County, Mississippi
- USDA Hardiness Zones: 9a (USDA PHZM 2023)
- Last Spring Frost (state avg.): Feb 28 - Mar 30 (NOAA 30-Year Climate Normals)
- First Fall Frost (state avg.): Oct 25 - Nov 20 (NOAA 30-Year Climate Normals)
- County Land Area: 463K acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. County boundaries: US Census TIGER/Line 2025.
Frost dates here are the Jackson County average. Low spots and tree cover move them by days on any one yard — see your exact frost windows.
Frequently Asked Questions
What hardiness zone is Jackson County, Mississippi?
Jackson County sits in USDA hardiness zone 9a, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.
When does frost risk typically end in Jackson County?
Jackson County follows Mississippi's statewide frost window: last spring frost around Feb 28 - Mar 30 and first fall frost around Oct 25 - Nov 20, per NOAA 30-year climate normals (1991–2020). Frost dates shift with elevation and local microclimate, so watch your own site's cold pockets.
What vegetables grow in Jackson County?
Jackson County's zone 9a supports a wide range — strong performers include Pecan, Okra, Muscadine Grape, Magnolia, and Sweet Potato. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is Jackson County, really?
Officially, Jackson County sits in USDA zone 9a (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.
Is the soil safe to grow vegetables in Jackson County?
The federal record around Jackson County runs heavier than most — 964 documented sites — 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.
Just moved to Jackson County — what should I know before planting?
Start with three facts. Jackson County sits in USDA zone 9a, which sets what survives winter; the statewide frost window runs about Feb 28 - Mar 30 to Oct 25 - Nov 20 (NOAA 30-year climate normals); and 964 documented sites sit on the federal record here, so a soil test before food beds is the smart first step. From there, matching plants to your actual soil and sun is the fun part.
Everything on this page is a Jackson County average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Mississippi's frost window, season length, and soil profile against the plant's real requirements.