Soil pH in Brooks, TX: Lime or Sulfur?

Typical topsoil pH in Brooks, TX

Typical topsoil in Brooks, TX is pH 6.62, already right for vegetable garden (6-7). Test before adding anything.

What Brooks needs, by plant

• Already in range: lawn (cool-season grass), vegetable garden, tomatoes, roses.
• Just outside, test first: strawberries (off by 0.1), pink hydrangeas (off by 0.1).
• Sulfur: potatoes 1.3 lb/100 sq ft; blueberries 1.9 lb/100 sq ft; azaleas and rhododendrons 1.7 lb/100 sq ft; blue hydrangeas 1.7 lb/100 sq ft.

What to do next

If your test lands near 6.62, you can skip lime and sulfur for lawn (cool-season grass), vegetable garden, tomatoes, strawberries, roses, pink hydrangeas.

How mixed the soil is

Of the 517,269 surveyed acres in Brooks, TX, 74% are near neutral (6.5-7.3), 26% are moderately acidic (5.5-6.5), 1% are alkaline (above 7.3). Mapped soils run from pH 5.8 to 7.9, a spread of 2.1 units across 28 soil components. 74% 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 4.1% clay and 0.6% organic matter, which this site treats as sandy. Moving it one pH unit takes about 3 lb of lime or 1.2 lb of sulfur per 100 sq ft. 4% of mapped components carry free carbonate (lime already in the ground).

Brooks against the rest of Texas

pH 6.62 is 0.81 below the Texas median of 7.43. 56 of 254 Texas counties have more acidic topsoil. Nationally it is more alkaline than the US county median of 6.05.

Closest in pH within the state: Bastrop (6.47), Burleson (6.51), Austin (6.54), Wharton (6.54), Matagorda (6.62), Lamar (6.68), Llano (6.68), Gonzales (6.7).

The range in Texas runs from Hardin at 4.64 to Upton at 8.19; Brooks sits 56% of the way up.