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

Planting zone for 37871 — Strawberry Plains, TN

ZIP code 37871 (Strawberry Plains, Jefferson County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 6 and the first fall frost October 29.

Where ZIP 37871 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 6
First frostOct 29
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 Strawberry Plains, 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 Strawberry Plains, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 6median — 50% chance of a later frost
Safe for tender plantsApril 21only 10% chance of frost after
First fall frostOctober 29median — 10% chance by Oct 16
Growing season205 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 7.

From the NOAA station Sevierville, TN — 9 miles away, elevation 899 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 37871

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 23 – Mar 9
SpinachSow outdoors · Feb 23 – Mar 16
Broccoli, cabbageStart indoors · Jan 26 – Feb 9
Broccoli, cabbageTransplant · Mar 16 – Mar 30
Onion setsPlant outdoors · Mar 9 – Mar 23
PotatoesPlant outdoors · Mar 16 – Mar 30
LettuceSow outdoors · Mar 9 – Mar 23
Carrots, beetsSow outdoors · Mar 16 – Mar 30
TomatoesStart indoors · Feb 9 – Feb 23
TomatoesTransplant · Apr 13 – Apr 27
Peppers, eggplantStart indoors · Jan 26 – Feb 9
Peppers, eggplantTransplant · Apr 20 – May 4
BeansSow outdoors · Apr 13 – Apr 27
Sweet cornSow outdoors · Apr 13 – Apr 27
Cucumbers, squashSow outdoors · Apr 13 – Apr 27
Fall lettuce, spinachSow outdoors · Sep 3 – Sep 17
GarlicPlant cloves · Oct 15 – Nov 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 6) and first fall frost (Oct 29) 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 37871 came on Feb 21 — 5 days earlier than the 1991–2020 average (Feb 26).

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 Strawberry Plains, TN

The soil mapped at the center of ZIP 37871 is Dewey — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.5moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of local importanceUSDA classification

Map unit: Dewey silt loam, 6 to 15 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 37871; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Strawberry Plains, TN

Summer high90 °Faverage high, July
Winter low27 °Faverage low, January
Hot days53days a year at 90 °F or more
Freezing nights86nights a year at 32 °F or less
Growing degree days4,551base 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
Precipitation52.7 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 49 °F, low 27 °F 49°27° JanFebruary: average high 54 °F, low 30 °F 54°30° FebMarch: average high 63 °F, low 36 °F 63°36° MarApril: average high 72 °F, low 45 °F 72°45° AprMay: average high 80 °F, low 55 °F 80°55° MayJune: average high 87 °F, low 63 °F 87°63° JunJuly: average high 90 °F, low 67 °F 90°67° JulAugust: average high 89 °F, low 66 °F 89°66° AugSeptember: average high 84 °F, low 60 °F 84°60° SepOctober: average high 74 °F, low 47 °F 74°47° OctNovember: average high 61 °F, low 35 °F 61°35° NovDecember: average high 52 °F, low 30 °F 52°30° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.81 in precipitation 4.8 JanFebruary: 4.63 in precipitation 4.6 FebMarch: 5.16 in precipitation 5.2 MarApril: 5.09 in precipitation 5.1 AprMay: 4.08 in precipitation 4.1 MayJune: 5.05 in precipitation 5.0 JunJuly: 5.43 in precipitation 5.4 JulAugust: 3.19 in precipitation 3.2 AugSeptember: 3.75 in precipitation 3.8 SepOctober: 2.88 in precipitation 2.9 OctNovember: 3.68 in precipitation 3.7 NovDecember: 4.93 in precipitation 4.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Sevierville, TN (9 mi away); precipitation: Mascot 1.4 Nne, TN (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

378067b
Mascot, TN · 4 mi
377647b
Kodak, TN · 6 mi
378207b
New Market, TN · 7 mi
379247b
Knoxville, TN · 7 mi
379147b
Knoxville, TN · 8 mi
377097b
Blaine, TN · 8 mi
377217b
Corryton, TN · 9 mi
379017b
Knoxville, TN · 11 mi

Tennessee planting zones →

Questions about 37871

What planting zone is ZIP code 37871?

ZIP code 37871 (Strawberry Plains, 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 Strawberry Plains, TN?

The median last spring frost (32 °F) near 37871 is April 6; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Sevierville station.

When is the first frost in Strawberry Plains, TN?

The median first fall frost near 37871 is October 29, giving a median frost-free growing season of 205 days.

When should I plant tomatoes in 37871?

Start tomato seeds indoors around Feb 9 – Feb 23 and set transplants outside around Apr 13 – Apr 27, one to three weeks after the median last frost.

How much rain and snow does 37871 get?

About 52.7 inches of precipitation a year (NOAA 1991–2020 normals, Mascot 1.4 Nne station).

How hot do summers get in Strawberry Plains, TN?

The average high peaks at 90 °F in July, with about 53 days a year at 90 °F or more.

What kind of soil does 37871 have?

The USDA soil survey maps Dewey at the center of ZIP 37871: silt loam, well drained, pH about 5.5 (moderately acidic).

Did spring come early in Strawberry Plains, TN in 2026?

Spring leaf-out near 37871 came on Feb 21 in 2026, 5 days earlier than the 1991–2020 average (Feb 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Strawberry Plains, TN?

Intermediate onions: the longest day near 37871 is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37871 change?

Yes. The 2012 USDA map put 37871 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.