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

Planting zone for 35144 — Siluria, AL

ZIP code 35144 (Siluria, Shelby County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 19 and the first fall frost November 8.

Where ZIP 35144 is

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.

Zone8b15 to 20 °F

Coldest night−9.4 to −6.7 °C

Last frostMar 19

First frostNov 8

2012 zone8a

Was 8a 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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Siluria, AL…

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 Siluria, AL

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 19median — 50% chance of a later frost

Safe for tender plantsApril 9only 10% chance of frost after

First fall frostNovember 8median — 10% chance by Oct 26

Growing season236 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 4 and returns around November 22.

From the NOAA station Helena, AL — 3 miles away, elevation 479 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 35144

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 5 – Feb 19

SpinachSow outdoors · Feb 5 – Feb 26

Broccoli, cabbageStart indoors · Jan 8 – Jan 22

Broccoli, cabbageTransplant · Feb 26 – Mar 12

Onion setsPlant outdoors · Feb 19 – Mar 5

PotatoesPlant outdoors · Feb 26 – Mar 12

LettuceSow outdoors · Feb 19 – Mar 5

Carrots, beetsSow outdoors · Feb 26 – Mar 12

TomatoesStart indoors · Jan 22 – Feb 5

TomatoesTransplant · Mar 26 – Apr 9

Peppers, eggplantStart indoors · Jan 8 – Jan 22

Peppers, eggplantTransplant · Apr 2 – Apr 16

BeansSow outdoors · Mar 26 – Apr 9

Sweet cornSow outdoors · Mar 26 – Apr 9

Cucumbers, squashSow outdoors · Mar 26 – Apr 9

Fall lettuce, spinachSow outdoors · Sep 13 – Sep 27

GarlicPlant cloves · Oct 25 – Nov 29

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 19) and first fall frost (Nov 8) 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 35144 came on Feb 13 — 5 days later than the 1991–2020 average (Feb 8).

average
Feb 82026
Feb 13

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 8b in Alabama

569 plants native to the lower 48 states, recorded in Alabama, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. 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 Siluria, AL.

Soil in Siluria, AL

The soil mapped at the center of ZIP 35144 is Dewey — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Dewey-Tupelo-Urban land complex, 0 to 8 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 35144; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Siluria, AL

Summer high92 °Faverage high, July

Winter low35 °Faverage low, January

Hot days87days a year at 90 °F or more

Freezing nights51nights a year at 32 °F or less

Growing degree days5,766base 50 °F — the season’s usable heat

Longest day14 h 21 mindaylight on June 21

Shortest day9 h 57 mindaylight on December 21

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

Precipitation59.7 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: Helena, AL (3 mi away); precipitation: Alabaster 2.4 Ne, AL (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.

Montevallo, AL · 7 mi

351248b

Pelham, AL · 8 mi

352448a

Birmingham, AL · 9 mi

352668b

Birmingham, AL · 10 mi

Alabama planting zones →

Questions about 35144

What planting zone is ZIP code 35144?

ZIP code 35144 (Siluria, AL) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Siluria, AL?

The median last spring frost (32 °F) near 35144 is March 19; after April 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Helena station.

When is the first frost in Siluria, AL?

The median first fall frost near 35144 is November 8, giving a median frost-free growing season of 236 days.

When should I plant tomatoes in 35144?

Start tomato seeds indoors around Jan 22 – Feb 5 and set transplants outside around Mar 26 – Apr 9, one to three weeks after the median last frost.

How much rain and snow does 35144 get?

About 59.7 inches of precipitation a year (NOAA 1991–2020 normals, Alabaster 2.4 Ne station).

How hot do summers get in Siluria, AL?

The average high peaks at 92 °F in July, with about 87 days a year at 90 °F or more.

What kind of soil does 35144 have?

The USDA soil survey maps Dewey at the center of ZIP 35144: silty clay loam, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Siluria, AL in 2026?

Spring leaf-out near 35144 came on Feb 13 in 2026, 5 days later than the 1991–2020 average (Feb 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Siluria, AL?

Intermediate onions: the longest day near 35144 is 14 h 21 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 35144 change?

Yes. The 2012 USDA map put 35144 in zone 8a; the 2023 map puts it in zone 8b. The newer map uses 1991–2020 data and more weather stations.