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

Planting zone for 37063 — Fosterville, TN

ZIP code 37063 (Fosterville, Rutherford County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 14 and the first fall frost October 25.

Where ZIP 37063 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 14
First frostOct 25
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 Fosterville, 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 Fosterville, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 14median — 50% chance of a later frost
Safe for tender plantsApril 30only 10% chance of frost after
First fall frostOctober 25median — 10% chance by Oct 11
Growing season192 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 2 and returns around November 2.

From the NOAA station Christiana 5w, TN — 6 miles away, elevation 751 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 37063

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 3 – Mar 17
SpinachSow outdoors · Mar 3 – Mar 24
Broccoli, cabbageStart indoors · Feb 3 – Feb 17
Broccoli, cabbageTransplant · Mar 24 – Apr 7
Onion setsPlant outdoors · Mar 17 – Mar 31
PotatoesPlant outdoors · Mar 24 – Apr 7
LettuceSow outdoors · Mar 17 – Mar 31
Carrots, beetsSow outdoors · Mar 24 – Apr 7
TomatoesStart indoors · Feb 17 – Mar 3
TomatoesTransplant · Apr 21 – May 5
Peppers, eggplantStart indoors · Feb 3 – Feb 17
Peppers, eggplantTransplant · Apr 28 – May 12
BeansSow outdoors · Apr 21 – May 5
Sweet cornSow outdoors · Apr 21 – May 5
Cucumbers, squashSow outdoors · Apr 21 – May 5
Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13
GarlicPlant cloves · Oct 11 – Nov 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 14) and first fall frost (Oct 25) 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 37063 came on Feb 21 — 4 days earlier than 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).

Soil in Fosterville, TN

The soil mapped at the center of ZIP 37063 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, 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 37063; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fosterville, TN

Summer high87 °Faverage high, July
Winter low26 °Faverage low, January
Hot days31days a year at 90 °F or more
Freezing nights92nights a year at 32 °F or less
Growing degree days4,129base 50 °F — the season’s usable heat
Longest day14 h 34 mindaylight on June 21
Shortest day9 h 44 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation57.9 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 47 °F, low 26 °F 47°26° JanFebruary: average high 52 °F, low 29 °F 52°29° FebMarch: average high 60 °F, low 36 °F 60°36° MarApril: average high 70 °F, low 43 °F 70°43° AprMay: average high 77 °F, low 53 °F 77°53° MayJune: average high 84 °F, low 62 °F 84°62° JunJuly: average high 87 °F, low 65 °F 87°65° JulAugust: average high 87 °F, low 64 °F 87°64° AugSeptember: average high 83 °F, low 57 °F 83°57° SepOctober: average high 72 °F, low 45 °F 72°45° OctNovember: average high 60 °F, low 35 °F 60°35° NovDecember: average high 51 °F, low 29 °F 51°29° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.90 in precipitation 4.9 JanFebruary: 5.33 in precipitation 5.3 FebMarch: 5.77 in precipitation 5.8 MarApril: 5.02 in precipitation 5.0 AprMay: 4.96 in precipitation 5.0 MayJune: 5.00 in precipitation 5.0 JunJuly: 4.92 in precipitation 4.9 JulAugust: 3.99 in precipitation 4.0 AugSeptember: 4.41 in precipitation 4.4 SepOctober: 3.72 in precipitation 3.7 OctNovember: 4.08 in precipitation 4.1 NovDecember: 5.82 in precipitation 5.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Christiana 5w, TN (6 mi away); precipitation: Christiana 5w, TN (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

370207b
Bell Buckle, TN · 1 mi
370377b
Christiana, TN · 4 mi
371277b
Murfreesboro, TN · 10 mi
371807b
Unionville, TN · 10 mi
371627b
Shelbyville, TN · 10 mi
370187b
Beechgrove, TN · 11 mi
371287b
Murfreesboro, TN · 11 mi
371537b
Rockvale, TN · 11 mi

Tennessee planting zones →

Questions about 37063

What planting zone is ZIP code 37063?

ZIP code 37063 (Fosterville, 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 Fosterville, TN?

The median last spring frost (32 °F) near 37063 is April 14; after April 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Christiana 5w station.

When is the first frost in Fosterville, TN?

The median first fall frost near 37063 is October 25, giving a median frost-free growing season of 192 days.

When should I plant tomatoes in 37063?

Start tomato seeds indoors around Feb 17 – Mar 3 and set transplants outside around Apr 21 – May 5, one to three weeks after the median last frost.

How much rain and snow does 37063 get?

About 57.9 inches of precipitation a year (NOAA 1991–2020 normals, Christiana 5w station).

How hot do summers get in Fosterville, TN?

The average high peaks at 87 °F in July, with about 31 days a year at 90 °F or more.

What kind of soil does 37063 have?

The USDA soil survey maps Talbott at the center of ZIP 37063: silt loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Fosterville, TN in 2026?

Spring leaf-out near 37063 came on Feb 21 in 2026, 4 days earlier than the 1991–2020 average (Feb 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fosterville, TN?

Intermediate onions: the longest day near 37063 is 14 h 34 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37063 change?

Yes. The 2012 USDA map put 37063 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.