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

Planting zone for 21841 — Newark, MD

ZIP code 21841 (Newark, Worcester County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 10 and the first fall frost October 31.

Where ZIP 21841 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 10
First frostOct 31
2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Newark, MD…

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 Newark, MD

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 10median — 50% chance of a later frost
Safe for tender plantsApril 28only 10% chance of frost after
First fall frostOctober 31median — 10% chance by Oct 16
Growing season202 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 29 and returns around November 11.

From the NOAA station Snow Hill 4 N, MD — 5 miles away, elevation 30 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 21841

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 27 – Mar 13
SpinachSow outdoors · Feb 27 – Mar 20
Broccoli, cabbageStart indoors · Jan 30 – Feb 13
Broccoli, cabbageTransplant · Mar 20 – Apr 3
Onion setsPlant outdoors · Mar 13 – Mar 27
PotatoesPlant outdoors · Mar 20 – Apr 3
LettuceSow outdoors · Mar 13 – Mar 27
Carrots, beetsSow outdoors · Mar 20 – Apr 3
TomatoesStart indoors · Feb 13 – Feb 27
TomatoesTransplant · Apr 17 – May 1
Peppers, eggplantStart indoors · Jan 30 – Feb 13
Peppers, eggplantTransplant · Apr 24 – May 8
BeansSow outdoors · Apr 17 – May 1
Sweet cornSow outdoors · Apr 17 – May 1
Cucumbers, squashSow outdoors · Apr 17 – May 1
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 10) 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 21841 came on Mar 11 — 5 days later than the 1991–2020 average (Mar 6).

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 7b in Maryland

618 plants native to the lower 48 states, recorded in Maryland, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 83

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 127

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 beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °F

Wildflowers & perennials 206

American 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 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 176

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 12

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 °Fheartleaf peppervine2 ft · blooms late spring · low shade tolerance · to −8 °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 Newark, MD.

Soil in Newark, MD

The soil mapped at the center of ZIP 21841 is Hambrook — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH6.0slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Hambrook sandy loam, 2 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 21841; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Newark, MD

Summer high89 °Faverage high, July
Winter low30 °Faverage low, January
Hot days38days a year at 90 °F or more
Freezing nights88nights a year at 32 °F or less
Growing degree days4,599base 50 °F — the season’s usable heat
Longest day14 h 50 mindaylight on June 21
Shortest day9 h 30 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation47.4 inper year, rain and melted snow
Snowfall10 inper year; 6 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 49 °F, low 30 °F 49°30° JanFebruary: average high 51 °F, low 31 °F 51°31° FebMarch: average high 58 °F, low 37 °F 58°37° MarApril: average high 69 °F, low 46 °F 69°46° AprMay: average high 78 °F, low 56 °F 78°56° MayJune: average high 85 °F, low 65 °F 85°65° JunJuly: average high 89 °F, low 70 °F 89°70° JulAugust: average high 87 °F, low 67 °F 87°67° AugSeptember: average high 82 °F, low 61 °F 82°61° SepOctober: average high 72 °F, low 50 °F 72°50° OctNovember: average high 61 °F, low 40 °F 61°40° NovDecember: average high 52 °F, low 34 °F 52°34° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.48 in precipitation, 2.8 in snowfall 3.5❄3 JanFebruary: 3.15 in precipitation, 3.6 in snowfall 3.1❄4 FebMarch: 4.33 in precipitation, 1.2 in snowfall 4.3❄1 MarApril: 3.46 in precipitation, 0.1 in snowfall 3.5 AprMay: 3.65 in precipitation 3.6 MayJune: 3.79 in precipitation 3.8 JunJuly: 4.15 in precipitation 4.2 JulAugust: 4.80 in precipitation 4.8 AugSeptember: 5.26 in precipitation 5.3 SepOctober: 4.07 in precipitation 4.1 OctNovember: 3.32 in precipitation 3.3 NovDecember: 3.92 in precipitation, 2.5 in snowfall 3.9❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Snow Hill 4 N, MD (5 mi away); precipitation: Snow Hill 4 N, MD (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

218637b
Snow Hill, MD · 7 mi
218117b
Berlin, MD · 7 mi
218527b
Powellville, MD · 9 mi
218297b
Girdletree, MD · 10 mi
218507b
Pittsville, MD · 11 mi
218747b
Willards, MD · 12 mi
218627b
Showell, MD · 12 mi
218438a
Ocean City, MD · 13 mi

Maryland planting zones →

Questions about 21841

What planting zone is ZIP code 21841?

ZIP code 21841 (Newark, MD) 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 Newark, MD?

The median last spring frost (32 °F) near 21841 is April 10; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Snow Hill 4 N station.

When is the first frost in Newark, MD?

The median first fall frost near 21841 is October 31, giving a median frost-free growing season of 202 days.

When should I plant tomatoes in 21841?

Start tomato seeds indoors around Feb 13 – Feb 27 and set transplants outside around Apr 17 – May 1, one to three weeks after the median last frost.

How much rain and snow does 21841 get?

About 47.4 inches of precipitation a year and 10 inches of snowfall (NOAA 1991–2020 normals, Snow Hill 4 N station).

How hot do summers get in Newark, MD?

The average high peaks at 89 °F in July, with about 38 days a year at 90 °F or more.

What kind of soil does 21841 have?

The USDA soil survey maps Hambrook at the center of ZIP 21841: sandy loam, well drained, pH about 6.0 (slightly acidic).

Did spring come early in Newark, MD in 2026?

Spring leaf-out near 21841 came on Mar 11 in 2026, 5 days later than the 1991–2020 average (Mar 6), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Newark, MD?

Intermediate onions: the longest day near 21841 is 14 h 50 min, so day-neutral types bulb best; long-day varieties may not bulb fully.