Soil pH in Richmond City, VA: Lime or Sulfur?

Typical topsoil pH in Richmond City, VA

Typical topsoil in Richmond City, VA is pH 5.01, too acidic for vegetable garden. Expect roughly 10.5 lb of lime per 100 sq ft, but only after a soil test confirms it.

What Richmond City needs, by plant

• Already in range: potatoes, blueberries, azaleas and rhododendrons, blue hydrangeas.
• Lime: lawn (cool-season grass) 10.5 lb/100 sq ft over 3 applications; vegetable garden 10.5 lb/100 sq ft over 3 applications; tomatoes 10.5 lb/100 sq ft over 3 applications; strawberries 7 lb/100 sq ft over 2 applications; roses 10.5 lb/100 sq ft over 3 applications; pink hydrangeas 8.4 lb/100 sq ft over 2 applications.

What to do next

If your test confirms pH near 5.01, spread about 105 lb of ground limestone per 1,000 sq ft of vegetable bed in 3 doses, ideally in fall.

How mixed the soil is

Of the 21,180 surveyed acres in Richmond City, VA, 87% are strongly acidic (below 5.5), 13% are moderately acidic (5.5-6.5). Mapped soils run from pH 4.6 to 5.8, a spread of 1.2 units across 96 soil components. 87% 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 13% clay and 1.54% organic matter, which this site treats as loam. Moving it one pH unit takes about 7 lb of lime or 2.3 lb of sulfur per 100 sq ft. None of the mapped components carry free carbonate.

Richmond City against the rest of Virginia

pH 5.01 is 0.23 below the Virginia median of 5.24. 30 of 127 Virginia counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.

Closest in pH within the state: James City (5), Middlesex (5), Emporia City (5), Page (5.01), Suffolk City (5.01), Virginia Beach City (5.01), Waynesboro City (5.03), Martinsville City (5.05).

The range in Virginia runs from Newport News City at 4.76 to Poquoson City at 6.36; Richmond City sits 16% of the way up.