Soil pH in Fremont, WY: Lime or Sulfur?

Typical topsoil pH in Fremont, WY

Typical topsoil in Fremont, WY is pH 7.85 and calcareous, so sulfur won't lower it for long. For vegetable garden, choose alkaline-tolerant varieties and add compost rather than fighting the soil.

What Fremont needs, by plant

• Beds or pots instead: lawn (cool-season grass), vegetable garden, tomatoes, potatoes, strawberries, roses, blueberries, azaleas and rhododendrons, blue hydrangeas, pink hydrangeas.

What to do next

If your test confirms pH near 7.85, consider raised beds for anything acid-loving; with 77% of soils here carrying free lime, sulfur will not hold.

How mixed the soil is

Of the 2,548,235 surveyed acres in Fremont, WY, 76% are alkaline (above 7.3), 24% are near neutral (6.5-7.3). Mapped soils run from pH 6.1 to 9.5, a spread of 3.4 units across 824 soil components. 76% 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 16.8% clay and 1.32% 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. 77% of mapped components carry free carbonate (lime already in the ground), enough that sulfur gets neutralised before it does much.

Fremont against the rest of Wyoming

pH 7.85 is 0.35 above the Wyoming median of 7.5. 20 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: Uinta (7.68), Platte (7.69), Washakie (7.74), Big Horn (7.76), Sweetwater (8.1), Carbon (8.31).

The range in Wyoming runs from Teton at 6.19 to Carbon at 8.31; Fremont sits 78% of the way up.