Soil pH in Kewaunee, WI: Lime or Sulfur?

Typical topsoil pH in Kewaunee, WI

Typical topsoil in Kewaunee, WI is pH 6.76, already right for vegetable garden (6-7). Test before adding anything.

What Kewaunee needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, tomatoes, roses.
• Sulfur: potatoes 3 lb/100 sq ft over 2 applications; strawberries 1.8 lb/100 sq ft; blueberries 4.1 lb/100 sq ft over 3 applications; azaleas and rhododendrons 3.5 lb/100 sq ft over 2 applications; blue hydrangeas 3.5 lb/100 sq ft over 2 applications; pink hydrangeas 1.2 lb/100 sq ft.

What to do next

If your test lands near 6.76, you can skip lime and sulfur for lawn (cool-season grass), vegetable garden, tomatoes, roses.

How mixed the soil is

Of the 188,254 surveyed acres in Kewaunee, WI, 97% are near neutral (6.5-7.3), 3% are moderately acidic (5.5-6.5), 1% are alkaline (above 7.3). Mapped soils run from pH 5.5 to 7.9, a spread of 2.4 units across 192 soil components. 97% 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% clay and 2.59% 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. 3% of mapped components carry free carbonate (lime already in the ground).

Kewaunee against the rest of Wisconsin

pH 6.76 is 0.68 above the Wisconsin median of 6.08. 60 of 72 Wisconsin counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Milwaukee (6.69), Outagamie (6.69), Brown (6.74), Fond du Lac (6.76), Manitowoc (6.79), Waukesha (6.79), Dodge (6.8), Ozaukee (6.8).

The range in Wisconsin runs from Iron at 5.16 to Washington at 6.88; Kewaunee sits 93% of the way up.