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

Planting zone for 38271 — Woodland Mills, TN

ZIP code 38271 (Woodland Mills, Obion 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 38271 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 Woodland Mills, 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 Woodland Mills, 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 19only 10% chance of frost after
First fall frostNovember 1median — 10% chance by Oct 17
Growing season211 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 23 and returns around November 12.

From the NOAA station Samburg Wr, TN — 4 miles away, elevation 312 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 38271

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 38271 came on Feb 25 — 4 days earlier than the 1991–2020 average (Mar 1).

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 Woodland Mills, TN

The soil mapped at the center of ZIP 38271 is Grenada — 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 classNot prime farmlandUSDA classification

Map unit: Grenada silt loam, 8 to 12 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 38271; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Woodland Mills, TN

Summer high87 °Faverage high, July
Winter low27 °Faverage low, January
Hot days40days a year at 90 °F or more
Freezing nights89nights a year at 32 °F or less
Growing degree days4,366base 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
Precipitation53.2 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 44 °F, low 27 °F 44°27° JanFebruary: average high 49 °F, low 30 °F 49°30° FebMarch: average high 59 °F, low 38 °F 59°38° MarApril: average high 69 °F, low 47 °F 69°47° AprMay: average high 77 °F, low 57 °F 77°57° MayJune: average high 85 °F, low 65 °F 85°65° JunJuly: average high 87 °F, low 68 °F 87°68° JulAugust: average high 87 °F, low 66 °F 87°66° AugSeptember: average high 81 °F, low 59 °F 81°59° SepOctober: average high 71 °F, low 47 °F 71°47° OctNovember: average high 59 °F, low 38 °F 59°38° NovDecember: average high 48 °F, low 30 °F 48°30° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.48 in precipitation 4.5 JanFebruary: 4.22 in precipitation 4.2 FebMarch: 4.95 in precipitation 5.0 MarApril: 5.28 in precipitation 5.3 AprMay: 5.72 in precipitation 5.7 MayJune: 4.24 in precipitation 4.2 JunJuly: 3.91 in precipitation 3.9 JulAugust: 3.27 in precipitation 3.3 AugSeptember: 3.85 in precipitation 3.9 SepOctober: 3.92 in precipitation 3.9 OctNovember: 4.27 in precipitation 4.3 NovDecember: 5.06 in precipitation 5.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Samburg Wr, TN (4 mi away); precipitation: Samburg Wr, TN (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

382607b
Troy, TN · 6 mi
420507b
Hickman, KY · 6 mi
382617b
Union City, TN · 7 mi
382327b
Hornbeak, TN · 9 mi
382547b
Samburg, TN · 9 mi
382817b
Union City, TN · 10 mi
380797b
Tiptonville, TN · 13 mi
382537b
Rives, TN · 14 mi

Tennessee planting zones →

Questions about 38271

What planting zone is ZIP code 38271?

ZIP code 38271 (Woodland Mills, 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 Woodland Mills, TN?

The median last spring frost (32 °F) near 38271 is April 3; after April 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Samburg Wr station.

When is the first frost in Woodland Mills, TN?

The median first fall frost near 38271 is November 1, giving a median frost-free growing season of 211 days.

When should I plant tomatoes in 38271?

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 38271 get?

About 53.2 inches of precipitation a year (NOAA 1991–2020 normals, Samburg Wr station).

How hot do summers get in Woodland Mills, TN?

The average high peaks at 87 °F in July, with about 40 days a year at 90 °F or more.

What kind of soil does 38271 have?

The USDA soil survey maps Grenada at the center of ZIP 38271: silt loam, moderately well drained, pH about 5.3 (strongly acidic).

Did spring come early in Woodland Mills, TN in 2026?

Spring leaf-out near 38271 came on Feb 25 in 2026, 4 days earlier than the 1991–2020 average (Mar 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Woodland Mills, TN?

Intermediate onions: the longest day near 38271 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 38271 change?

Yes. The 2012 USDA map put 38271 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.