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

Planting zone for 07866 — Rockaway, NJ

ZIP code 07866 (Rockaway, Morris County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 25 and the first fall frost October 17.

Where ZIP 07866 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 25
First frostOct 17
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Rockaway, 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 Rockaway, NJ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 25median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 17median — 10% chance by Oct 2
Growing season174 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 31.

From the NOAA station Charlotteburg Rsvr, NJ — 6 miles away, elevation 778 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 07866

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 14 – Mar 28
SpinachSow outdoors · Mar 14 – Apr 4
Broccoli, cabbageStart indoors · Feb 14 – Feb 28
Broccoli, cabbageTransplant · Apr 4 – Apr 18
Onion setsPlant outdoors · Mar 28 – Apr 11
PotatoesPlant outdoors · Apr 4 – Apr 18
LettuceSow outdoors · Mar 28 – Apr 11
Carrots, beetsSow outdoors · Apr 4 – Apr 18
TomatoesStart indoors · Feb 28 – Mar 14
TomatoesTransplant · May 2 – May 16
Peppers, eggplantStart indoors · Feb 14 – Feb 28
Peppers, eggplantTransplant · May 9 – May 23
BeansSow outdoors · May 2 – May 16
Sweet cornSow outdoors · May 2 – May 16
Cucumbers, squashSow outdoors · May 2 – May 16
Fall lettuce, spinachSow outdoors · Aug 22 – Sep 5
GarlicPlant cloves · Oct 3 – Nov 7
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 25) and first fall frost (Oct 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 07866 came on Apr 1 — 7 days earlier than the 1991–2020 average (Apr 8).

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 6b in New Jersey

581 plants native to the lower 48 states, recorded in New Jersey, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. 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 116

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 197

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 lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °F

Grasses 166

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °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 °F

Vines 9

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °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 Rockaway, NJ.

Soil in Rockaway, NJ

The soil mapped at the center of ZIP 07866 is Rockaway — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Rockaway-Rock outcrop complex, 15 to 25 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 07866; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Rockaway, NJ

Summer high83 °Faverage high, July
Winter low19 °Faverage low, January
Hot days10days a year at 90 °F or more
Freezing nights138nights a year at 32 °F or less
Growing degree days2,784base 50 °F — the season’s usable heat
Longest day15 h 07 mindaylight on June 21
Shortest day9 h 13 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation51.3 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 36 °F, low 19 °F 36°19° JanFebruary: average high 39 °F, low 19 °F 39°19° FebMarch: average high 47 °F, low 27 °F 47°27° MarApril: average high 59 °F, low 38 °F 59°38° AprMay: average high 70 °F, low 48 °F 70°48° MayJune: average high 78 °F, low 57 °F 78°57° JunJuly: average high 83 °F, low 61 °F 83°61° JulAugust: average high 81 °F, low 60 °F 81°60° AugSeptember: average high 75 °F, low 52 °F 75°52° SepOctober: average high 63 °F, low 41 °F 63°41° OctNovember: average high 51 °F, low 32 °F 51°32° NovDecember: average high 41 °F, low 25 °F 41°25° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.73 in precipitation 3.7 JanFebruary: 3.11 in precipitation 3.1 FebMarch: 4.18 in precipitation 4.2 MarApril: 4.02 in precipitation 4.0 AprMay: 4.24 in precipitation 4.2 MayJune: 4.80 in precipitation 4.8 JunJuly: 4.82 in precipitation 4.8 JulAugust: 4.50 in precipitation 4.5 AugSeptember: 4.71 in precipitation 4.7 SepOctober: 4.89 in precipitation 4.9 OctNovember: 3.72 in precipitation 3.7 NovDecember: 4.56 in precipitation 4.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Charlotteburg Rsvr, NJ (6 mi away); precipitation: Rockaway 0.4 Nnw, NJ (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

078426b
Hibernia, NJ · <1 mi
070056b
Boonton, NJ · 4 mi
078346b
Denville, NJ · 5 mi
070466b
Mountain Lakes, NJ · 5 mi
074386b
Oak Ridge, NJ · 5 mi
078016b
Dover, NJ · 5 mi
074056b
Butler, NJ · 6 mi
074356b
Newfoundland, NJ · 6 mi

New Jersey planting zones →

Questions about 07866

What planting zone is ZIP code 07866?

ZIP code 07866 (Rockaway, NJ) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Rockaway, NJ?

The median last spring frost (32 °F) near 07866 is April 25; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Charlotteburg Rsvr station.

When is the first frost in Rockaway, NJ?

The median first fall frost near 07866 is October 17, giving a median frost-free growing season of 174 days.

When should I plant tomatoes in 07866?

Start tomato seeds indoors around Feb 28 – Mar 14 and set transplants outside around May 2 – May 16, one to three weeks after the median last frost.

How much rain and snow does 07866 get?

About 51.3 inches of precipitation a year (NOAA 1991–2020 normals, Rockaway 0.4 Nnw station).

How hot do summers get in Rockaway, NJ?

The average high peaks at 83 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 07866 have?

The USDA soil survey maps Rockaway at the center of ZIP 07866: sandy loam, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Rockaway, NJ in 2026?

Spring leaf-out near 07866 came on Apr 1 in 2026, 7 days earlier than the 1991–2020 average (Apr 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Rockaway, NJ?

Long-day onions: the longest day near 07866 is 15 h 07 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 07866 change?

Yes. The 2012 USDA map put 07866 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.