Soil pH in Sublette, WY: Lime or Sulfur?

Typical topsoil pH in Sublette, WY

Typical topsoil in Sublette, WY is pH 6.97, already right for vegetable garden (6-7). Test before adding anything.

What Sublette needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, roses.
• Just outside, test first: tomatoes (off by 0.2).
• Sulfur: potatoes 3.5 lb/100 sq ft over 2 applications; strawberries 2.3 lb/100 sq ft over 2 applications; blueberries 4.6 lb/100 sq ft over 3 applications; azaleas and rhododendrons 3.9 lb/100 sq ft over 2 applications; blue hydrangeas 3.9 lb/100 sq ft over 2 applications; pink hydrangeas 1.6 lb/100 sq ft.

What to do next

If your test lands near 6.97, you can skip lime and sulfur for lawn (cool-season grass), vegetable garden, tomatoes, roses.

How mixed the soil is

Of the 0 surveyed acres in Sublette, WY, 37% are alkaline (above 7.3), 36% are near neutral (6.5-7.3), 19% are moderately acidic (5.5-6.5), 7% are strongly acidic (below 5.5). Mapped soils run from pH 4.3 to 10, a spread of 5.7 units across 1,613 soil components. No single class covers 60% of the county, so two gardens a few miles apart here can need opposite treatments. Test your own bed.

Clay, organic matter and rates

Topsoil here averages 16.8% clay and 2.12% 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. 28% of mapped components carry free carbonate (lime already in the ground).

Sublette against the rest of Wyoming

pH 6.97 is 0.53 below the Wyoming median of 7.5. 2 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: Teton (6.19), Lincoln (6.56), Crook (7.06), Sheridan (7.25), Hot Springs (7.34), Johnson (7.35).

The range in Wyoming runs from Teton at 6.19 to Carbon at 8.31; Sublette sits 37% of the way up.