Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 37044 — Clarksville, TN

ZIP code 37044 (Clarksville, Montgomery County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 3 and the first fall frost November 1.

Where ZIP 37044 is

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 3

First frostNov 1

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 Clarksville, 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 Clarksville, TN

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 3median — 50% chance of a later frost

Safe for tender plantsApril 20only 10% chance of frost after

First fall frostNovember 1median — 10% chance by Oct 20

Growing season212 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 22 and returns around November 11.

From the NOAA station Clarksville Wwtp, TN — within 1 mile, elevation 404 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 37044

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 20 – Mar 6

SpinachSow outdoors · Feb 20 – Mar 13

Broccoli, cabbageStart indoors · Jan 23 – Feb 6

Broccoli, cabbageTransplant · Mar 13 – Mar 27

Onion setsPlant outdoors · Mar 6 – Mar 20

PotatoesPlant outdoors · Mar 13 – Mar 27

LettuceSow outdoors · Mar 6 – Mar 20

Carrots, beetsSow outdoors · Mar 13 – Mar 27

TomatoesStart indoors · Feb 6 – Feb 20

TomatoesTransplant · Apr 10 – Apr 24

Peppers, eggplantStart indoors · Jan 23 – Feb 6

Peppers, eggplantTransplant · Apr 17 – May 1

BeansSow outdoors · Apr 10 – Apr 24

Sweet cornSow outdoors · Apr 10 – Apr 24

Cucumbers, squashSow outdoors · Apr 10 – Apr 24

Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20

GarlicPlant cloves · Oct 18 – Nov 22

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 3) and first fall frost (Nov 1) 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 37044 came on Feb 25 — about the same time as the 1991–2020 average (Feb 26).

average
Feb 262026
Feb 25

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).

Native plants for zone 7b in Tennessee

566 plants native to the lower 48 states, recorded in Tennessee, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Clarksville, TN.

Soil in Clarksville, TN

The soil mapped at the center of ZIP 37044 is Sengtown — gravelly silt loam, well drained.

TextureGravelly silt loama good balance for most vegetables

pH6.3slightly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.8%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Sengtown gravelly silt loam, 5 to 12 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 37044; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Clarksville, TN

Summer high90 °Faverage high, July

Winter low28 °Faverage low, January

Hot days57days a year at 90 °F or more

Freezing nights78nights a year at 32 °F or less

Growing degree days4,716base 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

Precipitation53.5 inper year, rain and melted snow

Snowfall1 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Clarksville Wwtp, TN (within 1 mile); precipitation: Clarksville Wwtp, TN (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

370407b

Clarksville, TN · 2 mi

370417b

Clarksville, TN · 4 mi

370427b

Clarksville, TN · 4 mi

370437b

Clarksville, TN · 7 mi

371917b

Woodlawn, TN · 10 mi

422237a

Fort Campbell, KY · 10 mi

370527b

Cunningham, TN · 11 mi

371717b

Southside, TN · 11 mi

All 5 ZIP codes in Clarksville → · Tennessee planting zones →

Questions about 37044

What planting zone is ZIP code 37044?

ZIP code 37044 (Clarksville, 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 Clarksville, TN?

The median last spring frost (32 °F) near 37044 is April 3; after April 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Clarksville Wwtp station.

When is the first frost in Clarksville, TN?

The median first fall frost near 37044 is November 1, giving a median frost-free growing season of 212 days.

When should I plant tomatoes in 37044?

Start tomato seeds indoors around Feb 6 – Feb 20 and set transplants outside around Apr 10 – Apr 24, one to three weeks after the median last frost.

How much rain and snow does 37044 get?

About 53.5 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Clarksville Wwtp station).

How hot do summers get in Clarksville, TN?

The average high peaks at 90 °F in July, with about 57 days a year at 90 °F or more.

What kind of soil does 37044 have?

The USDA soil survey maps Sengtown at the center of ZIP 37044: gravelly silt loam, well drained, pH about 6.3 (slightly acidic).

Did spring come early in Clarksville, TN in 2026?

Spring leaf-out near 37044 came on Feb 25 in 2026, about the same as the 1991–2020 average (Feb 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Clarksville, TN?

Intermediate onions: the longest day near 37044 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37044 change?

Yes. The 2012 USDA map put 37044 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.