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

Planting zone for 07003 — Bloomfield, NJ

ZIP code 07003 (Bloomfield, Essex County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 4 and the first fall frost November 6.

Where ZIP 07003 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 4
First frostNov 6
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 Bloomfield, 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 Bloomfield, NJ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 4median — 50% chance of a later frost
Safe for tender plantsApril 16only 10% chance of frost after
First fall frostNovember 6median — 10% chance by Oct 25
Growing season216 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 26 and returns around November 19.

From the NOAA station Harrison, NJ — 4 miles away, elevation 23 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 07003

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 21 – Mar 7
SpinachSow outdoors · Feb 21 – Mar 14
Broccoli, cabbageStart indoors · Jan 24 – Feb 7
Broccoli, cabbageTransplant · Mar 14 – Mar 28
Onion setsPlant outdoors · Mar 7 – Mar 21
PotatoesPlant outdoors · Mar 14 – Mar 28
LettuceSow outdoors · Mar 7 – Mar 21
Carrots, beetsSow outdoors · Mar 14 – Mar 28
TomatoesStart indoors · Feb 7 – Feb 21
TomatoesTransplant · Apr 11 – Apr 25
Peppers, eggplantStart indoors · Jan 24 – Feb 7
Peppers, eggplantTransplant · Apr 18 – May 2
BeansSow outdoors · Apr 11 – Apr 25
Sweet cornSow outdoors · Apr 11 – Apr 25
Cucumbers, squashSow outdoors · Apr 11 – Apr 25
Fall lettuce, spinachSow outdoors · Sep 11 – Sep 25
GarlicPlant cloves · Oct 23 – Nov 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 4) and first fall frost (Nov 6) 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 07003 came on Mar 26 — about the same time as the 1991–2020 average (Mar 24).

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 Bloomfield, NJ

The soil mapped at the center of ZIP 07003 is Boonton — slightly decomposed plant material, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSlightly decomposed plant materialtop layer
pH3.9strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter77%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land, Boonton substratum - Boonton complex, red sandstone lowland, 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 07003; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bloomfield, NJ

Summer high87 °Faverage high, July
Winter low25 °Faverage low, January
Hot days31days a year at 90 °F or more
Freezing nights83nights a year at 32 °F or less
Growing degree days3,759base 50 °F — the season’s usable heat
Longest day15 h 06 mindaylight on June 21
Shortest day9 h 14 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation52.4 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 39 °F, low 25 °F 39°25° JanFebruary: average high 42 °F, low 26 °F 42°26° FebMarch: average high 50 °F, low 33 °F 50°33° MarApril: average high 62 °F, low 43 °F 62°43° AprMay: average high 72 °F, low 54 °F 72°54° MayJune: average high 82 °F, low 63 °F 82°63° JunJuly: average high 87 °F, low 69 °F 87°69° JulAugust: average high 85 °F, low 67 °F 85°67° AugSeptember: average high 78 °F, low 60 °F 78°60° SepOctober: average high 66 °F, low 48 °F 66°48° OctNovember: average high 54 °F, low 38 °F 54°38° NovDecember: average high 44 °F, low 31 °F 44°31° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.50 in precipitation 3.5 JanFebruary: 3.23 in precipitation 3.2 FebMarch: 4.17 in precipitation 4.2 MarApril: 4.71 in precipitation 4.7 AprMay: 3.91 in precipitation 3.9 MayJune: 4.41 in precipitation 4.4 JunJuly: 5.15 in precipitation 5.2 JulAugust: 5.51 in precipitation 5.5 AugSeptember: 4.30 in precipitation 4.3 SepOctober: 5.05 in precipitation 5.0 OctNovember: 3.83 in precipitation 3.8 NovDecember: 4.62 in precipitation 4.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Harrison, NJ (4 mi away); precipitation: Cedar Grove Twp 0.4 W, NJ (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

3 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

070287a
Glen Ridge, NJ · <1 mi
070427a
Montclair, NJ · 2 mi
071097b
Belleville, NJ · 2 mi
071107b
Nutley, NJ · 2 mi
070437a
Montclair, NJ · 3 mi
070177a
East Orange, NJ · 3 mi
070127a
Clifton, NJ · 3 mi
071047b
Newark, NJ · 3 mi

New Jersey planting zones →

Questions about 07003

What planting zone is ZIP code 07003?

ZIP code 07003 (Bloomfield, NJ) 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 Bloomfield, NJ?

The median last spring frost (32 °F) near 07003 is April 4; after April 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Harrison station.

When is the first frost in Bloomfield, NJ?

The median first fall frost near 07003 is November 6, giving a median frost-free growing season of 216 days.

When should I plant tomatoes in 07003?

Start tomato seeds indoors around Feb 7 – Feb 21 and set transplants outside around Apr 11 – Apr 25, one to three weeks after the median last frost.

How much rain and snow does 07003 get?

About 52.4 inches of precipitation a year (NOAA 1991–2020 normals, Cedar Grove Twp 0.4 W station).

How hot do summers get in Bloomfield, NJ?

The average high peaks at 87 °F in July, with about 31 days a year at 90 °F or more.

What kind of soil does 07003 have?

The USDA soil survey maps Boonton at the center of ZIP 07003: slightly decomposed plant material, well drained, pH about 3.9 (strongly acidic).

Did spring come early in Bloomfield, NJ in 2026?

Spring leaf-out near 07003 came on Mar 26 in 2026, about the same as the 1991–2020 average (Mar 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bloomfield, NJ?

Long-day onions: the longest day near 07003 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).