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

Planting zone for 38039 — Grand Junction, TN

ZIP code 38039 (Grand Junction, Hardeman County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 1 and the first fall frost November 3.

Where ZIP 38039 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 1

First frostNov 3

2012 zone7b

Same zone as on the 2012 map. 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 Grand Junction, 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 Grand Junction, TN

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 1median — 50% chance of a later frost

Safe for tender plantsApril 17only 10% chance of frost after

First fall frostNovember 3median — 10% chance by Oct 21

Growing season217 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 17 and returns around November 14.

From the NOAA station Ames Plantation, TN — 4 miles away, elevation 459 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 38039

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 18 – Mar 4

SpinachSow outdoors · Feb 18 – Mar 11

Broccoli, cabbageStart indoors · Jan 21 – Feb 4

Broccoli, cabbageTransplant · Mar 11 – Mar 25

Onion setsPlant outdoors · Mar 4 – Mar 18

PotatoesPlant outdoors · Mar 11 – Mar 25

LettuceSow outdoors · Mar 4 – Mar 18

Carrots, beetsSow outdoors · Mar 11 – Mar 25

TomatoesStart indoors · Feb 4 – Feb 18

TomatoesTransplant · Apr 8 – Apr 22

Peppers, eggplantStart indoors · Jan 21 – Feb 4

Peppers, eggplantTransplant · Apr 15 – Apr 29

BeansSow outdoors · Apr 8 – Apr 22

Sweet cornSow outdoors · Apr 8 – Apr 22

Cucumbers, squashSow outdoors · Apr 8 – Apr 22

Fall lettuce, spinachSow outdoors · Sep 8 – Sep 22

GarlicPlant cloves · Oct 20 – Nov 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 1) and first fall frost (Nov 3) 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 38039 came on Feb 18 — about the same time as the 1991–2020 average (Feb 18).

average
Feb 182026
Feb 18

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 Grand Junction, TN.

Soil in Grand Junction, TN

The soil mapped at the center of ZIP 38039 is Loring — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classprime farmlandUSDA classification

Map unit: Loring silt loam, 2 to 5 percent slopes, eroded.

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 38039; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Grand Junction, TN

Summer high91 °Faverage high, July

Winter low31 °Faverage low, January

Hot days67days a year at 90 °F or more

Freezing nights74nights a year at 32 °F or less

Growing degree days5,176base 50 °F — the season’s usable heat

Longest day14 h 31 mindaylight on June 21

Shortest day9 h 48 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation57.8 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ames Plantation, TN (4 mi away); precipitation: Ames Plantation, 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.

386477b

Michigan City, MS · 7 mi

380427b

Hickory Valley, TN · 7 mi

Middleton, TN · 15 mi

380688a

Somerville, TN · 16 mi

Tennessee planting zones →

Questions about 38039

What planting zone is ZIP code 38039?

ZIP code 38039 (Grand Junction, 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 Grand Junction, TN?

The median last spring frost (32 °F) near 38039 is April 1; after April 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ames Plantation station.

When is the first frost in Grand Junction, TN?

The median first fall frost near 38039 is November 3, giving a median frost-free growing season of 217 days.

When should I plant tomatoes in 38039?

Start tomato seeds indoors around Feb 4 – Feb 18 and set transplants outside around Apr 8 – Apr 22, one to three weeks after the median last frost.

How much rain and snow does 38039 get?

About 57.8 inches of precipitation a year (NOAA 1991–2020 normals, Ames Plantation station).

How hot do summers get in Grand Junction, TN?

The average high peaks at 91 °F in July, with about 67 days a year at 90 °F or more.

What kind of soil does 38039 have?

The USDA soil survey maps Loring at the center of ZIP 38039: silt loam, moderately well drained, pH about 5.3 (strongly acidic).

Did spring come early in Grand Junction, TN in 2026?

Spring leaf-out near 38039 came on Feb 18 in 2026, about the same as the 1991–2020 average (Feb 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Grand Junction, TN?

Intermediate onions: the longest day near 38039 is 14 h 31 min, so day-neutral types bulb best; long-day varieties may not bulb fully.