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

Planting zone for Rockville Centre, NY

Rockville Centre, NY is in USDA zone 7b across its 2 ZIP codes. The median last spring frost is April 7 and the first fall frost November 8.

Rockville Centre on the zone map

Outlined: its 1 ZIP code areas · 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
ZIP codes2
Last frostApr 7
First frostNov 8
Growing season212 days

7b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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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 Rockville Centre, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 7median — 50% chance of a later frost
Safe for tender plantsApril 26only 10% chance of frost after
First fall frostNovember 8median — 10% chance by Oct 27
Growing season212 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 21.

From the NOAA station Oceanside, NY, elevation 13 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 Rockville Centre

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 24 – Mar 10
SpinachSow outdoors · Feb 24 – Mar 17
Broccoli, cabbageStart indoors · Jan 27 – Feb 10
Broccoli, cabbageTransplant · Mar 17 – Mar 31
Onion setsPlant outdoors · Mar 10 – Mar 24
PotatoesPlant outdoors · Mar 17 – Mar 31
LettuceSow outdoors · Mar 10 – Mar 24
Carrots, beetsSow outdoors · Mar 17 – Mar 31
TomatoesStart indoors · Feb 10 – Feb 24
TomatoesTransplant · Apr 14 – Apr 28
Peppers, eggplantStart indoors · Jan 27 – Feb 10
Peppers, eggplantTransplant · Apr 21 – May 5
BeansSow outdoors · Apr 14 – Apr 28
Sweet cornSow outdoors · Apr 14 – Apr 28
Cucumbers, squashSow outdoors · Apr 14 – Apr 28
Fall lettuce, spinachSow outdoors · Sep 13 – Sep 27
GarlicPlant cloves · Oct 25 – Nov 29
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 7) and first fall frost (Nov 8) 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 11570 came on Mar 28 — 4 days later than 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).

Native plants for zone 7b in New York

660 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. 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 131

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 224

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 201

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican 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 °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 9

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 °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 Rockville Centre, NY.

Soil in Rockville Centre, NY

The soil mapped at the center of ZIP 11570 is Riverhead — 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
pH4.5strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter90%high
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Riverhead complex, 0 to 3 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 11570; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Rockville Centre, NY

Summer high82 °Faverage high, July
Winter low26 °Faverage low, January
Hot days10days a year at 90 °F or more
Freezing nights89nights a year at 32 °F or less
Growing degree days3,227base 50 °F — the season’s usable heat
Longest day15 h 05 mindaylight on June 21
Shortest day9 h 15 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation48.6 inper year, rain and melted snow
Snowfall26 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 39 °F, low 26 °F 39°26° JanFebruary: average high 42 °F, low 27 °F 42°27° FebMarch: average high 48 °F, low 33 °F 48°33° MarApril: average high 59 °F, low 41 °F 59°41° AprMay: average high 67 °F, low 51 °F 67°51° MayJune: average high 76 °F, low 61 °F 76°61° JunJuly: average high 82 °F, low 67 °F 82°67° JulAugust: average high 82 °F, low 67 °F 82°67° AugSeptember: average high 75 °F, low 60 °F 75°60° SepOctober: average high 64 °F, low 48 °F 64°48° OctNovember: average high 54 °F, low 39 °F 54°39° NovDecember: average high 44 °F, low 31 °F 44°31° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.81 in precipitation, 5.7 in snowfall 3.8❄6 JanFebruary: 3.01 in precipitation, 7.6 in snowfall 3.0❄8 FebMarch: 4.64 in precipitation, 4.8 in snowfall 4.6❄5 MarApril: 4.16 in precipitation, 1 in snowfall 4.2❄1 AprMay: 4.31 in precipitation 4.3 MayJune: 4.57 in precipitation 4.6 JunJuly: 4.25 in precipitation 4.3 JulAugust: 4.16 in precipitation 4.2 AugSeptember: 3.76 in precipitation 3.8 SepOctober: 4.30 in precipitation 4.3 OctNovember: 3.57 in precipitation, 0.2 in snowfall 3.6 NovDecember: 4.10 in precipitation, 6.2 in snowfall 4.1❄6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Oceanside, NY (2 mi away); precipitation: Oceanside, NY (2 mi away). Daylight is calculated from latitude.

ZIP codes in Rockville Centre

115707b
5 to 10 °F
115717b
5 to 10 °F

New York planting zones →

Questions about Rockville Centre

What planting zone is Rockville Centre, NY?

Rockville Centre, NY is in USDA hardiness zone 7b on the 2023 map (7b: 5 to 10 °F).

When is the last frost in Rockville Centre, NY?

The median last spring frost is April 7 and the median first fall frost is November 8 (NOAA 1991–2020 normals, Oceanside station).

When can I plant a garden in Rockville Centre, NY?

Cool-season crops like peas and spinach go in around Feb 24 – Mar 17; tomatoes, peppers, beans and squash after about Apr 14, once frost risk has passed.

What kind of onions grow in Rockville Centre, NY?

Long-day onions: the longest day is 15 h 05 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

How much rain and snow does Rockville Centre, NY get?

About 48.6 inches of precipitation a year and 26 inches of snowfall (NOAA 1991–2020 normals).