Soil pH in Park, WY: Lime or Sulfur?

Typical topsoil pH in Park, WY

Typical topsoil in Park, WY is pH 7.6, too alkaline for vegetable garden. Expect roughly 2.5 lb of sulfur per 100 sq ft, but only after a soil test confirms it.

What Park needs, by plant

• Sulfur: lawn (cool-season grass) 2.5 lb/100 sq ft over 2 applications; vegetable garden 2.5 lb/100 sq ft over 2 applications; tomatoes 2.5 lb/100 sq ft over 2 applications; potatoes 4.8 lb/100 sq ft over 3 applications; strawberries 3.7 lb/100 sq ft over 2 applications; roses 2.5 lb/100 sq ft over 2 applications; blueberries 6 lb/100 sq ft over 3 applications; azaleas and rhododendrons 5.3 lb/100 sq ft over 3 applications; blue hydrangeas 5.3 lb/100 sq ft over 3 applications; pink hydrangeas 3 lb/100 sq ft over 2 applications.

What to do next

If your test confirms pH near 7.6, work in about 25 lb of elemental sulfur per 1,000 sq ft of vegetable bed in 2 doses.

How mixed the soil is

Of the 1,463 surveyed acres in Park, WY, 100% are alkaline (above 7.3). Mapped soils run from pH 7.6 to 7.6, a spread of 0 units across 1 soil components. 100% 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 10% clay and 0.75% 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.

Park against the rest of Wyoming

pH 7.6 is 0.1 above the Wyoming median of 7.5. 14 of 23 Wyoming counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Converse (7.5), Weston (7.5), Goshen (7.55), Albany (7.58), Natrona (7.64), Uinta (7.68), Platte (7.69), Washakie (7.74).

The range in Wyoming runs from Teton at 6.19 to Carbon at 8.31; Park sits 67% of the way up.