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

Planting zone for 70441 — Greensburg, LA

ZIP code 70441 (Greensburg, St. Helena County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 13 and the first fall frost November 17.

Where ZIP 70441 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 frostMar 13

First frostNov 17

2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Greensburg, 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 Greensburg, LA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 13median — 50% chance of a later frost

Safe for tender plantsApril 4only 10% chance of frost after

First fall frostNovember 17median — 10% chance by Nov 1

Growing season251 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 27 and returns around December 1.

From the NOAA station Clinton 5 Se, LA — 14 miles away, elevation 200 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 70441

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 30 – Feb 13

SpinachSow outdoors · Jan 30 – Feb 20

Broccoli, cabbageStart indoors · Jan 2 – Jan 16

Broccoli, cabbageTransplant · Feb 20 – Mar 6

Onion setsPlant outdoors · Feb 13 – Feb 27

PotatoesPlant outdoors · Feb 20 – Mar 6

LettuceSow outdoors · Feb 13 – Feb 27

Carrots, beetsSow outdoors · Feb 20 – Mar 6

TomatoesStart indoors · Jan 16 – Jan 30

TomatoesTransplant · Mar 20 – Apr 3

Peppers, eggplantStart indoors · Jan 2 – Jan 16

Peppers, eggplantTransplant · Mar 27 – Apr 10

BeansSow outdoors · Mar 20 – Apr 3

Sweet cornSow outdoors · Mar 20 – Apr 3

Cucumbers, squashSow outdoors · Mar 20 – Apr 3

Fall lettuce, spinachSow outdoors · Sep 22 – Oct 6

GarlicPlant cloves · Nov 3 – Dec 8

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 13) and first fall frost (Nov 17) 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 70441 came on Jan 16 — 13 days earlier than the 1991–2020 average (Jan 29).

average
Jan 292026
Jan 16

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 Greensburg, LA.

Soil in Greensburg, LA

The soil mapped at the center of ZIP 70441 is Tangi — 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 matter2.25%moderate

Hydrologic groupC/Dslow when drained; wet otherwise

Farmland classprime farmlandUSDA classification

Map unit: Tangi silt loam, 1 to 3 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 70441; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Greensburg, LA

Summer high90 °Faverage high, July

Winter low38 °Faverage low, January

Hot days73days a year at 90 °F or more

Freezing nights29nights a year at 32 °F or less

Growing degree days6,115base 50 °F — the season’s usable heat

Longest day14 h 09 mindaylight on June 21

Shortest day10 h 09 mindaylight on December 21

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

Precipitation68 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: Clinton 5 Se, LA (14 mi away); precipitation: Pine Grove Fire Twr, LA (11 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.

707229a

Clinton, LA · 12 mi

704539a

Pine Grove, LA · 12 mi

704369a

Fluker, LA · 13 mi

704659a

Tangipahoa, LA · 14 mi

Louisiana planting zones →

Questions about 70441

What planting zone is ZIP code 70441?

ZIP code 70441 (Greensburg, 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 Greensburg, LA?

The median last spring frost (32 °F) near 70441 is March 13; after April 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Clinton 5 Se station.

When is the first frost in Greensburg, LA?

The median first fall frost near 70441 is November 17, giving a median frost-free growing season of 251 days.

When should I plant tomatoes in 70441?

Start tomato seeds indoors around Jan 16 – Jan 30 and set transplants outside around Mar 20 – Apr 3, one to three weeks after the median last frost.

How much rain and snow does 70441 get?

About 68 inches of precipitation a year (NOAA 1991–2020 normals, Pine Grove Fire Twr station).

How hot do summers get in Greensburg, LA?

The average high peaks at 90 °F in July, with about 73 days a year at 90 °F or more.

What kind of soil does 70441 have?

The USDA soil survey maps Tangi at the center of ZIP 70441: silt loam, moderately well drained, pH about 5.3 (strongly acidic).

Did spring come early in Greensburg, LA in 2026?

Spring leaf-out near 70441 came on Jan 16 in 2026, 13 days earlier than the 1991–2020 average (Jan 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Greensburg, LA?

Short-day onions: the longest day near 70441 is 14 h 09 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 70441 change?

Yes. The 2012 USDA map put 70441 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.