Soil pH in Nevada, CA: Lime or Sulfur?

Typical topsoil pH in Nevada, CA

Typical topsoil in Nevada, CA is pH 6.04, already right for vegetable garden (6-7). Test before adding anything.

What Nevada needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, strawberries, roses, pink hydrangeas.
• Just outside, test first: tomatoes (off by 0.2), potatoes (off by 0), azaleas and rhododendrons (off by 0).
• Sulfur: blueberries 2.3 lb/100 sq ft over 2 applications; blue hydrangeas 1.8 lb/100 sq ft.

What to do next

If your test lands near 6.04, 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 1,008,452 surveyed acres in Nevada, CA, 88% are moderately acidic (5.5-6.5), 9% are near neutral (6.5-7.3), 3% are strongly acidic (below 5.5). Mapped soils run from pH 5 to 7.6, a spread of 2.6 units across 532 soil components. 88% 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 15.9% clay and 4.32% 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. None of the mapped components carry free carbonate.

Nevada against the rest of California

pH 6.04 is 0.5 below the California median of 6.54. 5 of 58 California counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.

Closest in pH within the state: Mariposa (5.87), Amador (6), Tuolumne (6.02), El Dorado (6.04), Mendocino (6.05), Sonoma (6.08), San Benito (6.09), Marin (6.11).

The range in California runs from Del Norte at 5.43 to Imperial at 8.16; Nevada sits 22% of the way up.