Soil pH in Camden, NJ: Lime or Sulfur?

Typical topsoil pH in Camden, NJ

Typical topsoil in Camden, NJ is pH 5, too acidic for vegetable garden. Expect roughly 4.5 lb of lime per 100 sq ft, but only after a soil test confirms it.

What Camden needs, by plant

• Already in range: potatoes, blueberries, azaleas and rhododendrons, blue hydrangeas.
• Lime: lawn (cool-season grass) 4.5 lb/100 sq ft; vegetable garden 4.5 lb/100 sq ft; tomatoes 4.5 lb/100 sq ft; strawberries 3 lb/100 sq ft; roses 4.5 lb/100 sq ft; pink hydrangeas 3.9 lb/100 sq ft.

What to do next

If your test confirms pH near 5, spread about 45 lb of ground limestone per 1,000 sq ft of vegetable bed, ideally in fall.

How mixed the soil is

Of the 95,744 surveyed acres in Camden, NJ, 70% are strongly acidic (below 5.5), 30% are moderately acidic (5.5-6.5). Mapped soils run from pH 3.9 to 6.5, a spread of 2.6 units across 308 soil components. 70% of the land falls in one class, so the county figure is a fair first guess for most yards here.

Clay, organic matter and rates

Topsoil here averages 6.1% clay and 1.87% organic matter, which this site treats as sandy. Moving it one pH unit takes about 3 lb of lime or 1.2 lb of sulfur per 100 sq ft. None of the mapped components carry free carbonate.

Camden against the rest of New Jersey

pH 5 is 0.17 below the New Jersey median of 5.17. 5 of 21 New Jersey counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.

Closest in pH within the state: Passaic (4.89), Monmouth (4.95), Sussex (4.99), Bergen (5), Cape May (5), Middlesex (5.03), Union (5.14), Atlantic (5.17).

The range in New Jersey runs from Burlington at 4.68 to Hudson at 6.98; Camden sits 14% of the way up.