Dumas, Mississippi, sits in USDA hardiness zones 8a-9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include pecan, okra, muscadine grape, and magnolia — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Dumas, 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 Dumas lot. 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.
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Quick Facts
USDA Zones
8a-9a
Last Hard Freeze (28°F)
Feb 1
Town normal — light frosts run a few weeks later
First Frost (state avg.)
Oct 25 - Nov 20
Town Area
2K acres
Hardiness Zone Range
Growing Season (statewide frost window)
Zone maps are averages across Dumas. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil varies lot by lot — soil types explained.
What Grows in Dumas
Plants matched to Dumas's USDA zones 8a-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.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Total Sites
74
within ~10 miles of Dumas
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Dumas
Severity Distribution
within ~10 miles of Dumas
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Dumas, Underground Storage Tanks runs higher than the national average — 53 sites nearby. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Dumas
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
Dumas Average
- ●USDA Zones 8a-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 specific parcel in Dumas
Pull a site-specific report for your exact address in Dumas, 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 Dumas, Mississippi
- USDA Hardiness Zones: 8a-9a (USDA PHZM 2023)
- Last Hard Freeze (28°F): Feb 1 (town normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
- First Fall Frost (state avg.): Oct 25 - Nov 20 (NOAA 30-Year Climate Normals)
- Land Area: 2K acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is Dumas, Mississippi?
Dumas sits in USDA hardiness zones 8a-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 Dumas?
The last hard freeze (28°F) in Dumas typically lands around Feb 1, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.
What vegetables grow in Dumas?
Dumas's zones 8a-9a support 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 Dumas, really?
Officially, Dumas sits in USDA zones 8a-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 Dumas?
The federal record around Dumas shows 74 documented sites — 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 Dumas?
As the season closes around Mississippi's first fall frost near Oct 25 - Nov 20 (NOAA 30-year climate normals (1991–2020)), a few moves buy time: cover tender plants with floating row cover or an old sheet on still, clear nights, water the soil the afternoon before a freeze so it holds warmth overnight, and harvest frost-tender crops like tomatoes, peppers, and basil before the first hard night. Hardy greens and root crops shrug off light frost and often sweeten after it, so leave them in.
Everything on this page is a Dumas 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.