Soil Types in New Jersey

New Jersey has 549 zip codes in our database. The most common soil type is Loam, found in 0% of the state. Understanding your local soil type helps you choose the right plants and amendments for your garden.

New Jersey spans USDA hardiness zones 6b through 8a. Your hardiness zone determines which perennial plants will survive winter in your area. Enter your zip code above to find your exact zone and get personalized planting recommendations.

New Jersey may be small, but its geological diversity produces remarkable soil variety. The northwestern Highlands have rocky, acidic soils over Precambrian gneiss. The Piedmont through central New Jersey features red shale-derived soils — the distinctive red clay that colors many New Jersey rivers. The Inner Coastal Plain has the Greensand Marl Belt, where glauconite-rich soils provide natural potassium and give the earth a greenish tint. The Outer Coastal Plain stretching to the shore has deep, sandy soils similar to Delaware. The Pine Barrens in southern New Jersey have extremely acidic, sandy soils that support a unique pygmy forest ecosystem. Downer loamy sand, the state soil, represents the productive Coastal Plain agricultural soils that earned New Jersey its nickname: the Garden State.

New Jersey's growing season ranges from about 160 days in the northwestern highlands to 210 days along the shore. The Jersey Shore and southern coastal counties average 200-210 frost-free days, with ocean moderation delaying both the last spring frost (around April 1) and the first fall frost (late October). Central New Jersey near New Brunswick has about 185 days. The Delaware Valley near Trenton is similar. Northern New Jersey in the highlands has the shortest season at 160 days. New Jersey's climate is influenced by both the Atlantic Ocean and the Delaware Bay, creating favorable growing conditions that support one of the most diverse agricultural sectors in the eastern United States.

New Jersey earned the Garden State nickname honestly — it produces over 100 types of fruits and vegetables commercially. Jersey tomatoes are a regional institution, rivaling any in the country when grown in the state's sandy loam soils. Blueberries are a major crop, particularly in the acidic Pine Barrens soils of Burlington and Atlantic counties — New Jersey ranks among the top blueberry-producing states. Sweet corn, peppers, eggplant, peaches, cranberries, and asparagus are all significant crops. For home gardens, virtually any temperate vegetable thrives in New Jersey's moderate climate and productive soils. The greensand marl soils of central New Jersey are naturally rich in potassium, reducing fertilizer needs.

Rutgers Cooperative Extension provides soil testing through the New Jersey Agricultural Experiment Station for about $20. Given New Jersey's industrial history and urban density, soil contamination testing is important, especially in the northern industrial corridor (Newark, Jersey City, Paterson, Elizabeth). Lead, arsenic, and petroleum compounds may be present in soils near old factories, highways, and pre-1978 houses. Rutgers includes basic contaminant screening in their standard test. For clean suburban and rural soils, New Jersey gardens generally need lime (soils tend acidic) and organic matter. The sandy Coastal Plain soils need frequent organic additions to retain water and nutrients, while the heavier Piedmont clay soils benefit from compost and gypsum to improve drainage.