4 USDA Planting zone in Northwestern NJ

Northwestern New Jersey spans four different USDA Planting Zones 6a, 6b, 7a, and 7b, as declared by USDA update in 2023. Winter temperatures here range from -10°F to 10°F (-23.3°C to -12.2°C).

The coldest zone here is USDA zone 6a (-10°F to -5°F / -23.3°C to -20.6°C) which covers parts of Sussex County. The warmest zone is USDA zone 7b (5°F to 10°F / -15.0°C to -12.2°C) here which includes Alpine.

Most towns like Branchville, Chester, Hackettstown, Hamburg, Highland Lakes, Long Valley, Rockaway, and Vernon Valley are in the USDA zone 6b (-5°F to 0°F / -20.6°C to -17.8°C) with winter lows of -5°F to 0°F.

Many areas here lies in multiple USDA zones like Alpine (7a-7b), Morris County (6b-7a), Sussex County (6a-6b), and Warren County (6b-7a).

Towns like Clinton, Frenchtown, Lambertville, Morristown, Phillipsburg, and White House Station are all in USDA zone 7a, and Budd Lake, Branchville, Chester, Hackettstown, Hamburg, Highland Lakes, Long Valley, Rockaway, and Vernon Valley fall within zone 6b.

Locate your USDA planting zone of Northwestern NJ using our interactive map or the USDA hardiness zones table provided below.

Northwestern NJ’s USDA Planting Zones Map

Select or type your Northwestern NJ location in selection box below, to find its USDA Growing zone.

Northwestern NJ’s USDA Planting Zones Table

Northwestern New Jersey has four USDA Planting Zones 6a, 6b, 7a, and 7b. The 25 USDA hardiness zone locations in Northwestern New Jersey are Alpine, Boonton, Branchville, Budd Lake, Chester, Clinton, Franklin Lakes, Frenchtown, Hackettstown, Hamburg, Highland Lakes, Kinnelon, Lambertville, Long Valley, Mendham, Morris County, Morristown, Oakland, Phillipsburg, Ringwood, Rockaway, Sussex County, Vernon Valley, Warren County, and White House Station. The 25 USDA hardiness zone locations in Northwestern New Jersey are listed below.