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

Planting zone for 19049 — Langhorne, PA

ZIP code 19049 (Langhorne, Bucks County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 21 and the first fall frost October 25.

Where ZIP 19049 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 21
First frostOct 25
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 Langhorne, PA…

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 Langhorne, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 21median — 50% chance of a later frost
Safe for tender plantsMay 7only 10% chance of frost after
First fall frostOctober 25median — 10% chance by Oct 11
Growing season185 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 8 and returns around November 3.

From the NOAA station Neshaminy Falls, PA — 2 miles away, elevation 39 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 19049

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 10 – Mar 24
SpinachSow outdoors · Mar 10 – Mar 31
Broccoli, cabbageStart indoors · Feb 10 – Feb 24
Broccoli, cabbageTransplant · Mar 31 – Apr 14
Onion setsPlant outdoors · Mar 24 – Apr 7
PotatoesPlant outdoors · Mar 31 – Apr 14
LettuceSow outdoors · Mar 24 – Apr 7
Carrots, beetsSow outdoors · Mar 31 – Apr 14
TomatoesStart indoors · Feb 24 – Mar 10
TomatoesTransplant · Apr 28 – May 12
Peppers, eggplantStart indoors · Feb 10 – Feb 24
Peppers, eggplantTransplant · May 5 – May 19
BeansSow outdoors · Apr 28 – May 12
Sweet cornSow outdoors · Apr 28 – May 12
Cucumbers, squashSow outdoors · Apr 28 – May 12
Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13
GarlicPlant cloves · Oct 11 – Nov 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 21) and first fall frost (Oct 25) 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 19049 came on Mar 19 — 4 days earlier than the 1991–2020 average (Mar 23).

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 7a in Pennsylvania

620 plants native to the lower 48 states, recorded in Pennsylvania, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

Trees 78

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 123

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 212

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 181

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °FAtlantic mannagrass3 ft · blooms summer · low shade tolerance · to −8 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °F

Vines 11

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °F

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 Langhorne, PA.

Soil in Langhorne, PA

The soil mapped at the center of ZIP 19049 is Chester — silt loam, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSilt loama good balance for most vegetables
pH5.4strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Chester 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 19049; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Langhorne, PA

Summer high86 °Faverage high, July
Winter low22 °Faverage low, January
Hot days27days a year at 90 °F or more
Freezing nights120nights a year at 32 °F or less
Growing degree days3,352base 50 °F — the season’s usable heat
Longest day15 h 02 mindaylight on June 21
Shortest day9 h 18 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation50.7 inper year, rain and melted snow
Snowfall20 inper year; 18 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 39 °F, low 22 °F 39°22° JanFebruary: average high 42 °F, low 23 °F 42°23° FebMarch: average high 51 °F, low 29 °F 51°29° MarApril: average high 63 °F, low 40 °F 63°40° AprMay: average high 72 °F, low 50 °F 72°50° MayJune: average high 81 °F, low 60 °F 81°60° JunJuly: average high 86 °F, low 65 °F 86°65° JulAugust: average high 84 °F, low 64 °F 84°64° AugSeptember: average high 77 °F, low 56 °F 77°56° SepOctober: average high 66 °F, low 44 °F 66°44° OctNovember: average high 55 °F, low 33 °F 55°33° NovDecember: average high 44 °F, low 27 °F 44°27° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.69 in precipitation, 7 in snowfall 3.7❄7 JanFebruary: 3.06 in precipitation, 5.7 in snowfall 3.1❄6 FebMarch: 4.58 in precipitation, 3.5 in snowfall 4.6❄4 MarApril: 3.97 in precipitation 4.0 AprMay: 4.00 in precipitation 4.0 MayJune: 4.58 in precipitation 4.6 JunJuly: 4.94 in precipitation 4.9 JulAugust: 4.67 in precipitation 4.7 AugSeptember: 4.72 in precipitation 4.7 SepOctober: 4.21 in precipitation, 0.1 in snowfall 4.2 OctNovember: 3.63 in precipitation, 0.2 in snowfall 3.6 NovDecember: 4.65 in precipitation, 3.4 in snowfall 4.7❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Neshaminy Falls, PA (2 mi away); precipitation: Neshaminy Falls, PA (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.

190487a
Langhorne, PA · <1 mi
190477a
Langhorne, PA · <1 mi
190567a
Levittown, PA · 3 mi
190537a
Feasterville Trevose, PA · 3 mi
190577b
Levittown, PA · 4 mi
190307a
Fairless Hills, PA · 5 mi
189667a
Southampton, PA · 5 mi
190557b
Levittown, PA · 5 mi

All 3 ZIP codes in Langhorne → · Pennsylvania planting zones →

Questions about 19049

What planting zone is ZIP code 19049?

ZIP code 19049 (Langhorne, PA) 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 Langhorne, PA?

The median last spring frost (32 °F) near 19049 is April 21; after May 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Neshaminy Falls station.

When is the first frost in Langhorne, PA?

The median first fall frost near 19049 is October 25, giving a median frost-free growing season of 185 days.

When should I plant tomatoes in 19049?

Start tomato seeds indoors around Feb 24 – Mar 10 and set transplants outside around Apr 28 – May 12, one to three weeks after the median last frost.

How much rain and snow does 19049 get?

About 50.7 inches of precipitation a year and 20 inches of snowfall (NOAA 1991–2020 normals, Neshaminy Falls station).

How hot do summers get in Langhorne, PA?

The average high peaks at 86 °F in July, with about 27 days a year at 90 °F or more.

What kind of soil does 19049 have?

The USDA soil survey maps Chester at the center of ZIP 19049: silt loam, well drained, pH about 5.4 (strongly acidic).

Did spring come early in Langhorne, PA in 2026?

Spring leaf-out near 19049 came on Mar 19 in 2026, 4 days earlier than the 1991–2020 average (Mar 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Langhorne, PA?

Long-day onions: the longest day near 19049 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).