Soil pH in Richland, IL: Lime or Sulfur?

Typical topsoil pH in Richland, IL

Typical topsoil in Richland, IL is pH 6.21, already right for vegetable garden (6-7). Test before adding anything.

What Richland needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, tomatoes, strawberries, roses, pink hydrangeas.
• Just outside, test first: potatoes (off by 0.2), azaleas and rhododendrons (off by 0.2).
• Sulfur: blueberries 2.8 lb/100 sq ft over 2 applications; blue hydrangeas 2.3 lb/100 sq ft over 2 applications.

What to do next

If your test lands near 6.21, you can skip lime and sulfur for lawn (cool-season grass), vegetable garden, tomatoes, potatoes, strawberries, roses, azaleas and rhododendrons, pink hydrangeas.

How mixed the soil is

Of the 220,748 surveyed acres in Richland, IL, 66% are moderately acidic (5.5-6.5), 34% are near neutral (6.5-7.3). Mapped soils run from pH 5.5 to 7.3, a spread of 1.8 units across 116 soil components. 66% 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 17.5% clay and 1.9% 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.

Richland against the rest of Illinois

pH 6.21 is 0.19 below the Illinois median of 6.4. 13 of 102 Illinois counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Franklin (6.14), Edwards (6.17), Effingham (6.17), De Witt (6.21), Jackson (6.22), McDonough (6.23), Calhoun (6.25), Jasper (6.25).

The range in Illinois runs from Pope at 5.5 to Grundy at 6.75; Richland sits 57% of the way up.