Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 37379 — Soddy Daisy, TN

ZIP code 37379 (Soddy Daisy, Hamilton County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 7 and the first fall frost October 29.

Where ZIP 37379 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 7

First frostOct 29

2012 zone7b

Same zone as on the 2012 map. 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 Soddy Daisy, 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 Soddy Daisy, TN

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 7median — 50% chance of a later frost

Safe for tender plantsApril 28only 10% chance of frost after

First fall frostOctober 29median — 10% chance by Oct 13

Growing season203 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 8.

From the NOAA station Soddy Daisy-Mowbray Mtn, TN — 2 miles away, elevation 1,700 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 37379

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 24 – Mar 10

SpinachSow outdoors · Feb 24 – Mar 17

Broccoli, cabbageStart indoors · Jan 27 – Feb 10

Broccoli, cabbageTransplant · Mar 17 – Mar 31

Onion setsPlant outdoors · Mar 10 – Mar 24

PotatoesPlant outdoors · Mar 17 – Mar 31

LettuceSow outdoors · Mar 10 – Mar 24

Carrots, beetsSow outdoors · Mar 17 – Mar 31

TomatoesStart indoors · Feb 10 – Feb 24

TomatoesTransplant · Apr 14 – Apr 28

Peppers, eggplantStart indoors · Jan 27 – Feb 10

Peppers, eggplantTransplant · Apr 21 – May 5

BeansSow outdoors · Apr 14 – Apr 28

Sweet cornSow outdoors · Apr 14 – Apr 28

Cucumbers, squashSow outdoors · Apr 14 – Apr 28

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 7) 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 37379 came on Feb 25 — 4 days earlier than the 1991–2020 average (Mar 1).

average
Mar 12026
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.

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 Soddy Daisy, TN.

Soil in Soddy Daisy, TN

The soil mapped at the center of ZIP 37379 is Allen — loam, well drained.

TextureLoama good balance for most vegetables

pH5.8moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.75%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Allen loam, 12 to 25 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 37379; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Soddy Daisy, TN

Summer high88 °Faverage high, July

Winter low28 °Faverage low, January

Hot days17days a year at 90 °F or more

Freezing nights82nights a year at 32 °F or less

Growing degree days4,237base 50 °F — the season’s usable heat

Longest day14 h 32 mindaylight on June 21

Shortest day9 h 46 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation63.1 inper year, rain and melted snow

Snowfall4 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Soddy Daisy-Mowbray Mtn, TN (2 mi away); precipitation: Soddy Daisy-Mowbray Mtn, TN (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

373847b

Soddy Daisy, TN · 4 mi

Graysville, TN · 10 mi

373737b

Sale Creek, TN · 10 mi

373777b

Signal Mountain, TN · 11 mi

373087b

Birchwood, TN · 12 mi

All 2 ZIP codes in Soddy Daisy → · Tennessee planting zones →

Questions about 37379

What planting zone is ZIP code 37379?

ZIP code 37379 (Soddy Daisy, 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 Soddy Daisy, TN?

The median last spring frost (32 °F) near 37379 is April 7; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Soddy Daisy-Mowbray Mtn station.

When is the first frost in Soddy Daisy, TN?

The median first fall frost near 37379 is October 29, giving a median frost-free growing season of 203 days.

When should I plant tomatoes in 37379?

Start tomato seeds indoors around Feb 10 – Feb 24 and set transplants outside around Apr 14 – Apr 28, one to three weeks after the median last frost.

How much rain and snow does 37379 get?

About 63.1 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, Soddy Daisy-Mowbray Mtn station).

How hot do summers get in Soddy Daisy, TN?

The average high peaks at 88 °F in July, with about 17 days a year at 90 °F or more.

What kind of soil does 37379 have?

The USDA soil survey maps Allen at the center of ZIP 37379: loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Soddy Daisy, TN in 2026?

Spring leaf-out near 37379 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 Soddy Daisy, TN?

Intermediate onions: the longest day near 37379 is 14 h 32 min, so day-neutral types bulb best; long-day varieties may not bulb fully.