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

Planting zone for 08033 — Haddonfield, NJ

ZIP code 08033 (Haddonfield, Camden County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 15 and the first fall frost October 31.

Where ZIP 08033 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.

Zone7b5 to 10 °F

Coldest night−15 to −12.2 °C

Last frostApr 15

First frostOct 31

2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Haddonfield, NJ…

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 Haddonfield, NJ

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 15median — 50% chance of a later frost

Safe for tender plantsMay 1only 10% chance of frost after

First fall frostOctober 31median — 10% chance by Oct 16

Growing season199 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 1 and returns around November 10.

From the NOAA station Pennsauken 1n, NJ — 5 miles away, elevation 46 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 08033

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 4 – Mar 18

SpinachSow outdoors · Mar 4 – Mar 25

Broccoli, cabbageStart indoors · Feb 4 – Feb 18

Broccoli, cabbageTransplant · Mar 25 – Apr 8

Onion setsPlant outdoors · Mar 18 – Apr 1

PotatoesPlant outdoors · Mar 25 – Apr 8

LettuceSow outdoors · Mar 18 – Apr 1

Carrots, beetsSow outdoors · Mar 25 – Apr 8

TomatoesStart indoors · Feb 18 – Mar 4

TomatoesTransplant · Apr 22 – May 6

Peppers, eggplantStart indoors · Feb 4 – Feb 18

Peppers, eggplantTransplant · Apr 29 – May 13

BeansSow outdoors · Apr 22 – May 6

Sweet cornSow outdoors · Apr 22 – May 6

Cucumbers, squashSow outdoors · Apr 22 – May 6

Fall lettuce, spinachSow outdoors · Sep 5 – Sep 19

GarlicPlant cloves · Oct 17 – Nov 21

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 15) and first fall frost (Oct 31) 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 08033 came on Mar 13 — 5 days earlier than the 1991–2020 average (Mar 18).

average
Mar 182026
Mar 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).

Soil in Haddonfield, NJ

The soil mapped at the center of ZIP 08033 is Swedesboro — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding

pH6.3slightly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Swedesboro-Urban land complex, 0 to 5 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 08033; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Haddonfield, NJ

Summer high87 °Faverage high, July

Winter low25 °Faverage low, January

Hot days33days a year at 90 °F or more

Freezing nights103nights a year at 32 °F or less

Growing degree days3,711base 50 °F — the season’s usable heat

Longest day15 h 00 mindaylight on June 21

Shortest day9 h 20 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation48.1 inper year, rain and melted snow

Snowfall22 inper year; 21 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Pennsauken 1n, NJ (5 mi away); precipitation: Somerdale 4 Sw, NJ (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

080457b

Lawnside, NJ · 2 mi

080357b

Haddon Heights, NJ · 2 mi

081067b

Audubon, NJ · 2 mi

081087b

Collingswood, NJ · 2 mi

080077b

Barrington, NJ · 2 mi

080347b

Cherry Hill, NJ · 2 mi

New Jersey planting zones →

Questions about 08033

What planting zone is ZIP code 08033?

ZIP code 08033 (Haddonfield, NJ) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Haddonfield, NJ?

The median last spring frost (32 °F) near 08033 is April 15; after May 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Pennsauken 1n station.

When is the first frost in Haddonfield, NJ?

The median first fall frost near 08033 is October 31, giving a median frost-free growing season of 199 days.

When should I plant tomatoes in 08033?

Start tomato seeds indoors around Feb 18 – Mar 4 and set transplants outside around Apr 22 – May 6, one to three weeks after the median last frost.

How much rain and snow does 08033 get?

About 48.1 inches of precipitation a year and 22 inches of snowfall (NOAA 1991–2020 normals, Somerdale 4 Sw station).

How hot do summers get in Haddonfield, NJ?

The average high peaks at 87 °F in July, with about 33 days a year at 90 °F or more.

What kind of soil does 08033 have?

The USDA soil survey maps Swedesboro at the center of ZIP 08033: sandy loam, well drained, pH about 6.3 (slightly acidic).

Did spring come early in Haddonfield, NJ in 2026?

Spring leaf-out near 08033 came on Mar 13 in 2026, 5 days earlier than the 1991–2020 average (Mar 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Haddonfield, NJ?

Long-day onions: the longest day near 08033 is 15 h 00 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 08033 change?

Yes. The 2012 USDA map put 08033 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.