Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 37079 — Indian Mound, TN

ZIP code 37079 (Indian Mound, Stewart County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 4 and the first fall frost October 31.

Where ZIP 37079 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostApr 4
First frostOct 31
2012 zone7a

Was 7a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Indian Mound, TN…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Indian Mound, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 4median — 50% chance of a later frost
Safe for tender plantsApril 21only 10% chance of frost after
First fall frostOctober 31median — 10% chance by Oct 18
Growing season210 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 23 and returns around November 11.

From the NOAA station Dover 1 W, TN — 12 miles away, elevation 476 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 37079

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 21 – Mar 7
SpinachSow outdoors · Feb 21 – Mar 14
Broccoli, cabbageStart indoors · Jan 24 – Feb 7
Broccoli, cabbageTransplant · Mar 14 – Mar 28
Onion setsPlant outdoors · Mar 7 – Mar 21
PotatoesPlant outdoors · Mar 14 – Mar 28
LettuceSow outdoors · Mar 7 – Mar 21
Carrots, beetsSow outdoors · Mar 14 – Mar 28
TomatoesStart indoors · Feb 7 – Feb 21
TomatoesTransplant · Apr 11 – Apr 25
Peppers, eggplantStart indoors · Jan 24 – Feb 7
Peppers, eggplantTransplant · Apr 18 – May 2
BeansSow outdoors · Apr 11 – Apr 25
Sweet cornSow outdoors · Apr 11 – Apr 25
Cucumbers, squashSow outdoors · Apr 11 – Apr 25
Fall lettuce, spinachSow outdoors · Sep 5 – Sep 19
GarlicPlant cloves · Oct 17 – Nov 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 4) and first fall frost (Oct 31) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 37079 came on Feb 25 — 3 days earlier than the 1991–2020 average (Feb 28).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Indian Mound, TN

The soil mapped at the center of ZIP 37079 is Bodine — gravelly silt loam, somewhat excessively drained.

TextureGravelly silt loama good balance for most vegetables
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Bodine gravelly silt loam, 20 to 40 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 37079; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Indian Mound, TN

Summer high88 °Faverage high, July
Winter low27 °Faverage low, January
Hot days34days a year at 90 °F or more
Freezing nights79nights a year at 32 °F or less
Growing degree days4,553base 50 °F — the season’s usable heat
Longest day14 h 39 mindaylight on June 21
Shortest day9 h 40 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation56 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 46 °F, low 27 °F 46°27° JanFebruary: average high 51 °F, low 30 °F 51°30° FebMarch: average high 60 °F, low 38 °F 60°38° MarApril: average high 70 °F, low 47 °F 70°47° AprMay: average high 77 °F, low 57 °F 77°57° MayJune: average high 84 °F, low 66 °F 84°66° JunJuly: average high 88 °F, low 69 °F 88°69° JulAugust: average high 88 °F, low 68 °F 88°68° AugSeptember: average high 82 °F, low 60 °F 82°60° SepOctober: average high 71 °F, low 48 °F 71°48° OctNovember: average high 60 °F, low 38 °F 60°38° NovDecember: average high 50 °F, low 31 °F 50°31° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.16 in precipitation 4.2 JanFebruary: 4.42 in precipitation 4.4 FebMarch: 5.22 in precipitation 5.2 MarApril: 5.64 in precipitation 5.6 AprMay: 5.72 in precipitation 5.7 MayJune: 4.48 in precipitation 4.5 JunJuly: 5.01 in precipitation 5.0 JulAugust: 3.92 in precipitation 3.9 AugSeptember: 4.04 in precipitation 4.0 SepOctober: 4.09 in precipitation 4.1 OctNovember: 4.20 in precipitation 4.2 NovDecember: 5.10 in precipitation 5.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Dover 1 W, TN (12 mi away); precipitation: Clarksville 14.4 Wsw, TN (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

370507b
Cumberland City, TN · 6 mi
371917b
Woodlawn, TN · 7 mi
371427b
Palmyra, TN · 9 mi
370237a
Big Rock, TN · 12 mi
371787b
Tennessee Ridge, TN · 13 mi
370587b
Dover, TN · 13 mi
370617b
Erin, TN · 13 mi
422547a
La Fayette, KY · 14 mi

Tennessee planting zones →

Questions about 37079

What planting zone is ZIP code 37079?

ZIP code 37079 (Indian Mound, TN) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Indian Mound, TN?

The median last spring frost (32 °F) near 37079 is April 4; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Dover 1 W station.

When is the first frost in Indian Mound, TN?

The median first fall frost near 37079 is October 31, giving a median frost-free growing season of 210 days.

When should I plant tomatoes in 37079?

Start tomato seeds indoors around Feb 7 – Feb 21 and set transplants outside around Apr 11 – Apr 25, one to three weeks after the median last frost.

How much rain and snow does 37079 get?

About 56 inches of precipitation a year (NOAA 1991–2020 normals, Clarksville 14.4 Wsw station).

How hot do summers get in Indian Mound, TN?

The average high peaks at 88 °F in July, with about 34 days a year at 90 °F or more.

What kind of soil does 37079 have?

The USDA soil survey maps Bodine at the center of ZIP 37079: gravelly silt loam, somewhat excessively drained, pH about 5.0 (strongly acidic).

Did spring come early in Indian Mound, TN in 2026?

Spring leaf-out near 37079 came on Feb 25 in 2026, 3 days earlier than the 1991–2020 average (Feb 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Indian Mound, TN?

Intermediate onions: the longest day near 37079 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37079 change?

Yes. The 2012 USDA map put 37079 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.