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

Planting zone for 70810 — Baton Rouge, LA

ZIP code 70810 (Baton Rouge, East Baton Rouge Parish) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is February 28 and the first fall frost November 26.

Where ZIP 70810 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.

Zone9a20 to 25 °F

Coldest night−6.7 to −3.9 °C

Last frostFeb 28

First frostNov 26

2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Baton Rouge, LA…

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 Baton Rouge, LA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostFebruary 28median — 50% chance of a later frost

Safe for tender plantsMarch 21only 10% chance of frost after

First fall frostNovember 26median — 10% chance by Nov 6

Growing season272 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 7 and returns around December 16.

From the NOAA station Lsu Ben-Hur Farm, LA — 4 miles away, elevation 20 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 70810

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 17 – Jan 31

SpinachSow outdoors · Jan 17 – Feb 7

Broccoli, cabbageStart indoors · Dec 20 – Jan 3

Broccoli, cabbageTransplant · Feb 7 – Feb 21

Onion setsPlant outdoors · Jan 31 – Feb 14

PotatoesPlant outdoors · Feb 7 – Feb 21

LettuceSow outdoors · Jan 31 – Feb 14

Carrots, beetsSow outdoors · Feb 7 – Feb 21

TomatoesStart indoors · Jan 3 – Jan 17

TomatoesTransplant · Mar 7 – Mar 21

Peppers, eggplantStart indoors · Dec 20 – Jan 3

Peppers, eggplantTransplant · Mar 14 – Mar 28

BeansSow outdoors · Mar 7 – Mar 21

Sweet cornSow outdoors · Mar 7 – Mar 21

Cucumbers, squashSow outdoors · Mar 7 – Mar 21

Fall lettuce, spinachSow outdoors · Oct 1 – Oct 15

GarlicPlant cloves · Nov 12 – Dec 17

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 28) and first fall frost (Nov 26) 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 70810 came on Jan 11 — 15 days earlier than the 1991–2020 average (Jan 26).

average
Jan 262026
Jan 11

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 9a in Louisiana

517 plants native to the lower 48 states, recorded in Louisiana, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Baton Rouge, LA.

Soil in Baton Rouge, LA

The soil mapped at the center of ZIP 70810 is Sharkey — clay, poorly drained.

TextureClayholds water and nutrients; slow to drain and warm up

pH6.8neutral; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter2%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Sharkey-Tunica clays, 0 to 3 percent slopes, gently undulating, frequently flooded.

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 70810; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Baton Rouge, LA

Summer high91 °Faverage high, July

Winter low40 °Faverage low, January

Hot days88days a year at 90 °F or more

Freezing nights20nights a year at 32 °F or less

Growing degree days6,647base 50 °F — the season’s usable heat

Longest day14 h 06 mindaylight on June 21

Shortest day10 h 11 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation60.5 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lsu Ben-Hur Farm, LA (4 mi away); precipitation: Lsu Ben-Hur Farm, LA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9a.

708369a

Baton Rouge, LA · 3 mi

708099a

Baton Rouge, LA · 4 mi

708049a

Baton Rouge, LA · 4 mi

708089a

Baton Rouge, LA · 5 mi

707769a

Saint Gabriel, LA · 6 mi

708279a

Baton Rouge, LA · 6 mi

707809a

Sunshine, LA · 6 mi

708939a

Baton Rouge, LA · 7 mi

All 41 ZIP codes in Baton Rouge → · Louisiana planting zones →

Questions about 70810

What planting zone is ZIP code 70810?

ZIP code 70810 (Baton Rouge, LA) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Baton Rouge, LA?

The median last spring frost (32 °F) near 70810 is February 28; after March 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lsu Ben-Hur Farm station.

When is the first frost in Baton Rouge, LA?

The median first fall frost near 70810 is November 26, giving a median frost-free growing season of 272 days.

When should I plant tomatoes in 70810?

Start tomato seeds indoors around Jan 3 – Jan 17 and set transplants outside around Mar 7 – Mar 21, one to three weeks after the median last frost.

How much rain and snow does 70810 get?

About 60.5 inches of precipitation a year (NOAA 1991–2020 normals, Lsu Ben-Hur Farm station).

How hot do summers get in Baton Rouge, LA?

The average high peaks at 91 °F in July, with about 88 days a year at 90 °F or more.

What kind of soil does 70810 have?

The USDA soil survey maps Sharkey at the center of ZIP 70810: clay, poorly drained, pH about 6.8 (neutral).

Did spring come early in Baton Rouge, LA in 2026?

Spring leaf-out near 70810 came on Jan 11 in 2026, 15 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Baton Rouge, LA?

Short-day onions: the longest day near 70810 is 14 h 06 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.