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

Planting zone for 37032 — Cedar Hill, TN

ZIP code 37032 (Cedar Hill, Robertson County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 9 and the first fall frost October 28.

Where ZIP 37032 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 9
First frostOct 28
2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Cedar Hill, 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 Cedar Hill, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 9median — 50% chance of a later frost
Safe for tender plantsApril 28only 10% chance of frost after
First fall frostOctober 28median — 10% chance by Oct 14
Growing season201 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 28 and returns around November 6.

From the NOAA station Springfield Exp Stn, TN — 11 miles away, elevation 745 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 37032

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 26 – Mar 12
SpinachSow outdoors · Feb 26 – Mar 19
Broccoli, cabbageStart indoors · Jan 29 – Feb 12
Broccoli, cabbageTransplant · Mar 19 – Apr 2
Onion setsPlant outdoors · Mar 12 – Mar 26
PotatoesPlant outdoors · Mar 19 – Apr 2
LettuceSow outdoors · Mar 12 – Mar 26
Carrots, beetsSow outdoors · Mar 19 – Apr 2
TomatoesStart indoors · Feb 12 – Feb 26
TomatoesTransplant · Apr 16 – Apr 30
Peppers, eggplantStart indoors · Jan 29 – Feb 12
Peppers, eggplantTransplant · Apr 23 – May 7
BeansSow outdoors · Apr 16 – Apr 30
Sweet cornSow outdoors · Apr 16 – Apr 30
Cucumbers, squashSow outdoors · Apr 16 – Apr 30
Fall lettuce, spinachSow outdoors · Sep 2 – Sep 16
GarlicPlant cloves · Oct 14 – Nov 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 9) and first fall frost (Oct 28) 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 37032 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 Cedar Hill, TN

The soil mapped at the center of ZIP 37032 is Sengtown — gravelly silt loam, well drained.

TextureGravelly silt loama good balance for most vegetables
pH6.3slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.8%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Sengtown gravelly silt loam, 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 37032; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Cedar Hill, TN

Summer high89 °Faverage high, July
Winter low27 °Faverage low, January
Hot days44days a year at 90 °F or more
Freezing nights91nights a year at 32 °F or less
Growing degree days4,509base 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
Precipitation51.9 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 45 °F, low 27 °F 45°27° JanFebruary: average high 50 °F, low 30 °F 50°30° FebMarch: average high 59 °F, low 37 °F 59°37° 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 89 °F, low 68 °F 89°68° JulAugust: average high 88 °F, low 66 °F 88°66° AugSeptember: average high 82 °F, low 60 °F 82°60° SepOctober: average high 71 °F, low 48 °F 71°48° OctNovember: average high 59 °F, low 38 °F 59°38° NovDecember: average high 49 °F, low 31 °F 49°31° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.89 in precipitation 3.9 JanFebruary: 4.35 in precipitation 4.3 FebMarch: 4.75 in precipitation 4.8 MarApril: 5.06 in precipitation 5.1 AprMay: 5.25 in precipitation 5.3 MayJune: 4.19 in precipitation 4.2 JunJuly: 4.43 in precipitation 4.4 JulAugust: 3.55 in precipitation 3.5 AugSeptember: 3.86 in precipitation 3.9 SepOctober: 4.00 in precipitation 4.0 OctNovember: 3.82 in precipitation 3.8 NovDecember: 4.73 in precipitation 4.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Springfield Exp Stn, TN (11 mi away); precipitation: Cedar Hill 2.6 N, TN (4 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.

370107b
Adams, TN · 6 mi
371467a
Pleasant View, TN · 8 mi
371727a
Springfield, TN · 9 mi
370357a
Chapmansboro, TN · 12 mi
422047a
Allensville, KY · 12 mi
370437b
Clarksville, TN · 13 mi
370737a
Greenbrier, TN · 13 mi
370807a
Joelton, TN · 14 mi

Tennessee planting zones →

Questions about 37032

What planting zone is ZIP code 37032?

ZIP code 37032 (Cedar Hill, 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 Cedar Hill, TN?

The median last spring frost (32 °F) near 37032 is April 9; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Springfield Exp Stn station.

When is the first frost in Cedar Hill, TN?

The median first fall frost near 37032 is October 28, giving a median frost-free growing season of 201 days.

When should I plant tomatoes in 37032?

Start tomato seeds indoors around Feb 12 – Feb 26 and set transplants outside around Apr 16 – Apr 30, one to three weeks after the median last frost.

How much rain and snow does 37032 get?

About 51.9 inches of precipitation a year (NOAA 1991–2020 normals, Cedar Hill 2.6 N station).

How hot do summers get in Cedar Hill, TN?

The average high peaks at 89 °F in July, with about 44 days a year at 90 °F or more.

What kind of soil does 37032 have?

The USDA soil survey maps Sengtown at the center of ZIP 37032: gravelly silt loam, well drained, pH about 6.3 (slightly acidic).

Did spring come early in Cedar Hill, TN in 2026?

Spring leaf-out near 37032 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 Cedar Hill, TN?

Intermediate onions: the longest day near 37032 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.