Maynardville, Tennessee, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Expect cabbage, prickly pear, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Maynardville, 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 Maynardville 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 Maynardville — soil, climate, flood, and parcel records. How we handle your address.
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Maynardville — the short answer
Maynardville, Tennessee: USDA zone 7b, about 226 days between hard freezes, across 3K acres of city.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~226
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 3K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 7b is Maynardville's average, not your lot's — a low corner or a tree line moves it. Against Maynardville's 226-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Maynardville
Each reading below is measured for Maynardville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMaynardville runs about 226 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredMaynardville sits in USDA hardiness zone 7b.
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 Maynardville is in
Maynardville sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Maynardville's own centroid rather than borrowed from Union County.
What Grows in Maynardville
Every plant below cleared Maynardville's own zone 7b and its 226-day season. Each card opens that plant's Tennessee profile. How we score.
Is it too late to plant in Maynardville?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Maynardville
Survey cells within 31 miles of Maynardville checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 82 miles off. What to watch for.
What's on the federal record near Maynardville
Closest first, within ~10 miles of Maynardville. Listing isn't leaking, and distance isn't exposure.
- 33 QuarryUnderground Storage Tanks · 500 ft
- Chuck Swan State ForestUnderground Storage Tanks · 500 ft
- Keck's Sports ShopUnderground Storage Tanks · 1100 ft
- 33 Sports And Marina IncUnderground Storage Tanks · 1100 ft
- Booker's One Stop no.2Underground Storage Tanks · 1600 ft
- Robbins' Service StationUnderground Storage Tanks · 2000 ft
- Food City Gas-N-Go No. 680Underground Storage Tanks · 0.7 mi
- TN0026Underground Storage Tanks · 0.8 mi
- Kays MarketUnderground Storage Tanks · 0.9 mi
- MAYNARDVILLE WATER DEPTPFAS · 1.4 mi
- Union Farmers Co-opUnderground Storage Tanks · 1.7 mi
- Wariota Healthcare Ctr #1716Underground Storage Tanks · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Maynardville'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 Maynardville.
Total Sites
127
within ~10 miles of Maynardville
Risk Level
Elevated
Highest-severity
5 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Maynardville
Severity Distribution
within ~10 miles of Maynardville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Maynardville, Mining runs higher than the national average — 22 sites within ~10 miles of Maynardville. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Maynardville
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 Maynardville average
Your land is one point inside Maynardville
Everything above resolves to Maynardville as a whole — one PHZM band and one 28°F frost record, read across 3K acres. 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 Maynardville Average
Maynardville Average
- ●USDA Zones 7b, averaged across Maynardville
- ●One soil character for all of Maynardville
- ●Frost dates read at Maynardville's scale: Mar 28 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Maynardville's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Maynardville
Pull a site-specific report for your exact address in Maynardville, Tennessee — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Maynardville averages can't show:
We read public map data around Maynardville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Maynardville average
How we know this about Maynardville
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 Maynardville’s own record; 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 Maynardville
When does frost risk typically end in Maynardville?
The last hard freeze (28°F) in Maynardville typically lands around Mar 28, 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 Apr 18.
When is the first frost in Maynardville?
The first hard freeze (28°F) in Maynardville typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 226 days after the spring freeze cleared.
How long is the growing season in Maynardville?
Measured between 28°F hard freezes, Maynardville sees about 226 frost-free days — roughly Mar 28 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 18 to Oct 26, about 191 days.
Is the soil safe to grow vegetables in Maynardville?
The federal record around Maynardville is a meaningful one — 127 documented sites, mostly Underground Storage Tanks entries (74), the nearest Underground Storage Tanks record under a tenth of a mile 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 Maynardville?
From about Oct 10 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 Nov 9 (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 Nov 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Maynardville's scale — its 7b band and its 226-day season. Your yard writes its own version of Maynardville'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 Maynardville’s own scale
7 of the readings below were taken at Maynardville's own scale — its own ~226-day season between 28°F freezes, the 3,452 acres it covers and 127 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Maynardville's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Maynardville's own 28°F hard-freeze dates, about Mar 28 and Nov 9 and the ~226-day span between themNOAA 1991–2020 Climate Normals
- 127 documented contamination sites on the federal record near Maynardville, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Maynardville's boundary and the 3,452 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~226-day seasonGrowable Ground crop-matching engine
- The ecoregion at Maynardville's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- Lanternfly survey cells around Maynardville checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Maynardville's 3,452 acres read through its county's SSURGO summaryfrom Union County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Union County
- The growing challenges every Tennessee grower plans around — written at state scale, so they stay on the state guidefrom Tennessee
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Union County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Maynardville's 3,452 acreswhy one lot differs from the next →
- Which side of Maynardville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,452 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Maynardville-wide figureread your own land →
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