Mershon, Georgia, sits in USDA hardiness zone 9a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include artichoke, fig, california poppy, and cabbage — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Mershon, 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 Mershon 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 Mershon — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Mershon — the short answer
Mershon, Georgia: USDA zone 9a, about 285 days between hard freezes, across 561 acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 20
- Pierce County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 2
- Pierce County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~285
- Pierce County normal — NOAA 1991–2020, nearest to this town
- Town area
- 561 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 Pierce County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Mershon's average, not your lot's — a low corner or a tree line moves it. Against Mershon's 285-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mershon
Each reading below is measured for Mershon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsMershon runs about 285 days between hard freezes (read from Pierce County, the closest normal to Mershon) — 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
MeasuredMershon 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 Mershon is in
Mershon sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Mershon's own centroid rather than borrowed from Pierce County.
What Grows in Mershon
Every plant below cleared Mershon's own zone 9a and its 285-day season. Each card opens that plant's Georgia profile. How we score.
Is it too late to plant in Mershon?
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 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 20 (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 Mershon
Closest first, within ~10 miles of Mershon. Listing isn't leaking, and distance isn't exposure.
- MENSHON GROCUnderground Storage Tanks · 1400 ft
- 27K001Nitrate · 2200 ft
- COUNTRY BOYS MINI MALL INCUnderground Storage Tanks · 2.4 mi
- MARTY HILTONUnderground Storage Tanks · 4.9 mi
- 28J001Nitrate · 6.6 mi
- IRMA CARTERUnderground Storage Tanks · 7.1 mi
- 28L001Nitrate · 7.5 mi
- PIERCE COUNTY ROAD DEPTUnderground Storage Tanks · 8.1 mi
- THORNTON TIRE & OILUnderground Storage Tanks · 8.4 mi
- PATTERSON ELEMENTARY SCHOOLUnderground Storage Tanks · 8.4 mi
- PATTERSON MINIT MARTUnderground Storage Tanks · 8.4 mi
- GRIFFINS SERVICE STATIONUnderground Storage Tanks · 8.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mershon'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 Mershon.
Total Sites
43
within ~10 miles of Mershon
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Mershon
Severity Distribution
within ~10 miles of Mershon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mershon, two things run higher than the national average within ~10 miles of Mershon — Toxics Release Inventory (3 sites) and Underground Storage Tanks (30 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Mershon
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 Mershon average
Your land is one point inside Mershon
Everything above resolves to Mershon as a whole — one PHZM band, read across 561 acres, with hard-freeze dates borrowed from Pierce County’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 Mershon Average
Mershon Average
- ●USDA Zones 9a, averaged across Mershon
- ●One soil character for all of Mershon
- ●Frost dates read at Mershon's scale: Feb 20 to Dec 2
YOUR Parcel
- ✓Your exact zone, not Mershon's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mershon
Pull a site-specific report for your exact address in Mershon, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mershon averages can't show:
We read public map data around Mershon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mershon average
How we know this about Mershon
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 Pierce County’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 Mershon
When does frost risk typically end in Mershon?
The last hard freeze (28°F) in Mershon typically lands around Feb 20, 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 13.
When is the first frost in Mershon?
The first hard freeze (28°F) in Mershon 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 285 days after the spring freeze cleared.
How long is the growing season in Mershon?
Measured between 28°F hard freezes, Mershon sees about 285 frost-free days — roughly Feb 20 through Dec 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 13 to Nov 18, about 250 days.
Is the soil safe to grow vegetables in Mershon?
The federal record around Mershon is a meaningful one — 43 documented sites, mostly Underground Storage Tanks entries (30), the nearest Underground Storage Tanks record about 0.3 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 Mershon?
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 Mershon's scale — its 9a band and its 285-day season. Your yard writes its own version of Mershon'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 Mershon’s own scale
5 of the readings below were taken at Mershon's own scale — the 561 acres it covers and 43 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Mershon's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 43 documented contamination sites on the federal record near Mershon, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Mershon's boundary and the 561 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~285-day seasonGrowable Ground crop-matching engine
- The ecoregion at Mershon's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Mershon has no normal of its own, so its county's is the closest measured readfrom Pierce County
- Soil character — no town-scale survey exists, so Mershon's 561 acres read through its county's SSURGO summaryfrom Pierce County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pierce County
- The growing challenges every Georgia grower plans around — written at state scale, so they stay on the state guidefrom Georgia
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Pierce County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mershon's 561 acreswhy one lot differs from the next →
- Which side of Mershon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 561 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Mershon-wide figureread your own land →
More in Georgia
Growing region
Nearby growing guides