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

Planting zone for 37770 — Lancing, TN

ZIP code 37770 (Lancing, Morgan County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 21 and the first fall frost October 17.

Where ZIP 37770 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 21
First frostOct 17
2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Lancing, 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 Lancing, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 21median — 50% chance of a later frost
Safe for tender plantsMay 12only 10% chance of frost after
First fall frostOctober 17median — 10% chance by Oct 4
Growing season177 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 5 and returns around October 27.

From the NOAA station Lancing 6 Nw, TN — 5 miles away, elevation 1,519 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 37770

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 10 – Mar 24
SpinachSow outdoors · Mar 10 – Mar 31
Broccoli, cabbageStart indoors · Feb 10 – Feb 24
Broccoli, cabbageTransplant · Mar 31 – Apr 14
Onion setsPlant outdoors · Mar 24 – Apr 7
PotatoesPlant outdoors · Mar 31 – Apr 14
LettuceSow outdoors · Mar 24 – Apr 7
Carrots, beetsSow outdoors · Mar 31 – Apr 14
TomatoesStart indoors · Feb 24 – Mar 10
TomatoesTransplant · Apr 28 – May 12
Peppers, eggplantStart indoors · Feb 10 – Feb 24
Peppers, eggplantTransplant · May 5 – May 19
BeansSow outdoors · Apr 28 – May 12
Sweet cornSow outdoors · Apr 28 – May 12
Cucumbers, squashSow outdoors · Apr 28 – May 12
Fall lettuce, spinachSow outdoors · Aug 22 – Sep 5
GarlicPlant cloves · Oct 3 – Nov 7
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 21) and first fall frost (Oct 17) 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 37770 came on Feb 25 — 6 days earlier than the 1991–2020 average (Mar 3).

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 Lancing, TN

The soil mapped at the center of ZIP 37770 is Lily — loam, well drained.

TextureLoama good balance for most vegetables
pH4.6strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.25%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Lily-Gilpin complex, 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 37770; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lancing, TN

Summer high86 °Faverage high, July
Winter low26 °Faverage low, January
Hot days14days a year at 90 °F or more
Freezing nights107nights a year at 32 °F or less
Growing degree days3,723base 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
Precipitation56.4 inper year, rain and melted snow
Snowfall5 inper year; 5 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 46 °F, low 26 °F 46°26° JanFebruary: average high 50 °F, low 28 °F 50°28° FebMarch: average high 59 °F, low 35 °F 59°35° MarApril: average high 69 °F, low 42 °F 69°42° AprMay: average high 76 °F, low 51 °F 76°51° MayJune: average high 83 °F, low 59 °F 83°59° JunJuly: average high 86 °F, low 63 °F 86°63° JulAugust: average high 85 °F, low 62 °F 85°62° AugSeptember: average high 80 °F, low 54 °F 80°54° SepOctober: average high 70 °F, low 43 °F 70°43° OctNovember: average high 59 °F, low 34 °F 59°34° NovDecember: average high 50 °F, low 29 °F 50°29° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 4.84 in precipitation, 2.2 in snowfall 4.8❄2 JanFebruary: 4.60 in precipitation, 2.1 in snowfall 4.6❄2 FebMarch: 4.96 in precipitation, 0.2 in snowfall 5.0 MarApril: 5.91 in precipitation 5.9 AprMay: 4.69 in precipitation 4.7 MayJune: 5.09 in precipitation 5.1 JunJuly: 5.71 in precipitation 5.7 JulAugust: 3.37 in precipitation 3.4 AugSeptember: 4.26 in precipitation 4.3 SepOctober: 3.30 in precipitation 3.3 OctNovember: 3.94 in precipitation, 0.1 in snowfall 3.9 NovDecember: 5.72 in precipitation, 0.3 in snowfall 5.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lancing 6 Nw, TN (5 mi away); precipitation: Lancing 6 Nw, TN (5 mi away). 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.

378877a
Wartburg, TN · 6 mi
378727a
Sunbright, TN · 8 mi
377267a
Deer Lodge, TN · 10 mi
378297b
Oakdale, TN · 11 mi
378457a
Petros, TN · 11 mi
377327a
Elgin, TN · 12 mi
378527a
Robbins, TN · 12 mi
377337a
Rugby, TN · 14 mi

Tennessee planting zones →

Questions about 37770

What planting zone is ZIP code 37770?

ZIP code 37770 (Lancing, TN) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Lancing, TN?

The median last spring frost (32 °F) near 37770 is April 21; after May 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lancing 6 Nw station.

When is the first frost in Lancing, TN?

The median first fall frost near 37770 is October 17, giving a median frost-free growing season of 177 days.

When should I plant tomatoes in 37770?

Start tomato seeds indoors around Feb 24 – Mar 10 and set transplants outside around Apr 28 – May 12, one to three weeks after the median last frost.

How much rain and snow does 37770 get?

About 56.4 inches of precipitation a year and 5 inches of snowfall (NOAA 1991–2020 normals, Lancing 6 Nw station).

How hot do summers get in Lancing, TN?

The average high peaks at 86 °F in July, with about 14 days a year at 90 °F or more.

What kind of soil does 37770 have?

The USDA soil survey maps Lily at the center of ZIP 37770: loam, well drained, pH about 4.6 (strongly acidic).

Did spring come early in Lancing, TN in 2026?

Spring leaf-out near 37770 came on Feb 25 in 2026, 6 days earlier than the 1991–2020 average (Mar 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lancing, TN?

Intermediate onions: the longest day near 37770 is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37770 change?

Yes. The 2012 USDA map put 37770 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.