Soil pH in Monroe, PA: Lime or Sulfur?
Typical topsoil pH in Monroe, PA
Typical topsoil in Monroe, PA is pH 5.28, too acidic for vegetable garden. Expect roughly 13.8 lb of lime per 100 sq ft, but only after a soil test confirms it.
What Monroe needs, by plant
- Already in range: potatoes, blueberries, azaleas and rhododendrons, blue hydrangeas.
- Just outside, test first: strawberries (off by 0.2).
- Lime: lawn (cool-season grass) 13.8 lb/100 sq ft over 3 applications; vegetable garden 13.8 lb/100 sq ft over 3 applications; tomatoes 13.8 lb/100 sq ft over 3 applications; roses 13.8 lb/100 sq ft over 3 applications; pink hydrangeas 11.5 lb/100 sq ft over 3 applications.
What to do next
If your test confirms pH near 5.28, spread about 138 lb of ground limestone per 1,000 sq ft of vegetable bed in 3 doses, ideally in fall.
How mixed the soil is
Of the 369,225 surveyed acres in Monroe, PA, 59% are strongly acidic (below 5.5), 36% are moderately acidic (5.5-6.5), 6% are near neutral (6.5-7.3). Mapped soils run from pH 3.9 to 6.7, a spread of 2.8 units across 382 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 16.2% clay and 6.49% organic matter, which this site treats as clay. At 6.49% organic matter the soil buffers like a heavier one, which pushes it into the clay bracket. Moving it one pH unit takes about 11.5 lb of lime or 3.4 lb of sulfur per 100 sq ft. None of the mapped components carry free carbonate.
Monroe against the rest of Pennsylvania
pH 5.28 is right at the Pennsylvania median of 5.31. 29 of 67 Pennsylvania counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.
Closest in pH within the state: Armstrong (5.25), Butler (5.26), Fulton (5.26), Fayette (5.27), Crawford (5.29), Lycoming (5.3), Schuylkill (5.3), Columbia (5.31).
The range in Pennsylvania runs from Forest at 4.57 to Greene at 6.07; Monroe sits 47% of the way up.