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

Planting zone for Mount Juliet, TN

Mount Juliet, TN is in USDA zone 7b across its 2 ZIP codes. The median last spring frost is April 1 and the first fall frost November 4.

Mount Juliet on the zone map

Outlined: its 1 ZIP code areas · 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
ZIP codes2
Last frostApr 1
First frostNov 4
Growing season216 days

7b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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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 Mount Juliet, 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 4median — 10% chance by Oct 23
Growing season216 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 20 and returns around November 15.

From the NOAA station Old Hickory WFO, TN, elevation 591 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 Mount Juliet

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 9 – Sep 23
GarlicPlant cloves · Oct 21 – Nov 25
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 1) and first fall frost (Nov 4) 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 37121 came on Feb 25 — about the same time as the 1991–2020 average (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.

Trees 82

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 116

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 184

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 157

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbluejoint5 ft · blooms late spring · high shade tolerance · to −33 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

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 Mount Juliet, TN.

Soil in Mount Juliet, TN

The soil mapped at the center of ZIP 37121 is Talbott — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Talbott silt loam, 5 to 20 percent slopes, eroded, rocky.

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 37121; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mount Juliet, TN

Summer high89 °Faverage high, July
Winter low28 °Faverage low, January
Hot days42days a year at 90 °F or more
Freezing nights69nights a year at 32 °F or less
Growing degree days4,558base 50 °F — the season’s usable heat
Longest day14 h 37 mindaylight on June 21
Shortest day9 h 42 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation53.9 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 28 °F 46°28° 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 78 °F, low 56 °F 78°56° MayJune: average high 85 °F, low 65 °F 85°65° JunJuly: average high 89 °F, low 68 °F 89°68° JulAugust: average high 88 °F, low 67 °F 88°67° AugSeptember: average high 82 °F, low 61 °F 82°61° SepOctober: average high 72 °F, low 49 °F 72°49° OctNovember: average high 59 °F, low 38 °F 59°38° NovDecember: average high 50 °F, low 32 °F 50°32° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.28 in precipitation 4.3 JanFebruary: 4.56 in precipitation 4.6 FebMarch: 4.93 in precipitation 4.9 MarApril: 5.03 in precipitation 5.0 AprMay: 5.33 in precipitation 5.3 MayJune: 4.27 in precipitation 4.3 JunJuly: 5.09 in precipitation 5.1 JulAugust: 4.12 in precipitation 4.1 AugSeptember: 3.97 in precipitation 4.0 SepOctober: 3.46 in precipitation 3.5 OctNovember: 4.01 in precipitation 4.0 NovDecember: 4.88 in precipitation 4.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Old Hickory WFO, TN (4 mi away); precipitation: Mount Juliet 2.9 Wsw, TN (3 mi away). Daylight is calculated from latitude.

ZIP codes in Mount Juliet

371217b
5 to 10 °F
371227b
5 to 10 °F

Tennessee planting zones →

Questions about Mount Juliet

What planting zone is Mount Juliet, TN?

Mount Juliet, TN is in USDA hardiness zone 7b on the 2023 map (7b: 5 to 10 °F).

When is the last frost in Mount Juliet, TN?

The median last spring frost is April 1 and the median first fall frost is November 4 (NOAA 1991–2020 normals, Old Hickory WFO station).

When can I plant a garden in Mount Juliet, TN?

Cool-season crops like peas and spinach go in around Feb 18 – Mar 11; tomatoes, peppers, beans and squash after about Apr 8, once frost risk has passed.

What kind of onions grow in Mount Juliet, TN?

Intermediate onions: the longest day is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

How much rain and snow does Mount Juliet, TN get?

About 53.9 inches of precipitation a year (NOAA 1991–2020 normals).