Soil pH in Greene, AL: Lime or Sulfur?

Typical topsoil pH in Greene, AL

Typical topsoil in Greene, AL is pH 5.48, too acidic for vegetable garden. Expect roughly 7 lb of lime per 100 sq ft, but only after a soil test confirms it.

What Greene needs, by plant

• Already in range: potatoes, blueberries, azaleas and rhododendrons, blue hydrangeas.
• Just outside, test first: strawberries (off by 0).
• Lime: lawn (cool-season grass) 7 lb/100 sq ft over 2 applications; vegetable garden 7 lb/100 sq ft over 2 applications; tomatoes 7 lb/100 sq ft over 2 applications; roses 7 lb/100 sq ft over 2 applications; pink hydrangeas 5.6 lb/100 sq ft over 2 applications.

What to do next

If your test confirms pH near 5.48, spread about 70 lb of ground limestone per 1,000 sq ft of vegetable bed in 2 doses, ideally in fall.

How mixed the soil is

Of the 336,035 surveyed acres in Greene, AL, 66% are strongly acidic (below 5.5), 19% are moderately acidic (5.5-6.5), 9% are near neutral (6.5-7.3), 6% are alkaline (above 7.3). Mapped soils run from pH 4.5 to 7.9, a spread of 3.4 units across 144 soil components. 66% 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 19.2% clay and 2.11% 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. 6% of mapped components carry free carbonate (lime already in the ground).

Greene against the rest of Alabama

pH 5.48 is 0.33 above the Alabama median of 5.15. 57 of 67 Alabama counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.

Closest in pH within the state: Perry (5.38), Hale (5.42), Lee (5.43), Morgan (5.44), Marengo (5.48), Dallas (5.51), Sumter (5.55), Chambers (5.57).

The range in Alabama runs from Randolph at 4.89 to Lowndes at 6.25; Greene sits 43% of the way up.