Soil pH in Franklin, ME: Lime or Sulfur?
Typical topsoil pH in Franklin, ME
Typical topsoil in Franklin, ME is pH 4.69, too acidic for vegetable garden. Expect roughly 12.6 lb of lime per 100 sq ft, but only after a soil test confirms it.
What Franklin needs, by plant
- Already in range: blueberries, azaleas and rhododendrons.
- Lime: lawn (cool-season grass) 12.6 lb/100 sq ft over 3 applications; vegetable garden 12.6 lb/100 sq ft over 3 applications; tomatoes 12.6 lb/100 sq ft over 3 applications; potatoes 5.6 lb/100 sq ft over 2 applications; strawberries 9.1 lb/100 sq ft over 2 applications; roses 12.6 lb/100 sq ft over 3 applications; blue hydrangeas 4.2 lb/100 sq ft; pink hydrangeas 11.2 lb/100 sq ft over 3 applications.
What to do next
If your test confirms pH near 4.69, spread about 126 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 1,048,005 surveyed acres in Franklin, ME, 95% are strongly acidic (below 5.5), 5% are moderately acidic (5.5-6.5). Mapped soils run from pH 3.9 to 7.1, a spread of 3.2 units across 1,028 soil components. 95% 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 6.3% clay and 6.35% organic matter, which this site treats as loam. At 6.35% organic matter the soil buffers like a heavier one, which pushes it into the loam bracket. 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.
Franklin against the rest of Maine
pH 4.69 is 0.19 below the Maine median of 4.88. 3 of 16 Maine counties have more acidic topsoil. Nationally it is more acidic than the US county median of 6.05.
Closest in pH within the state: Piscataquis (4.59), Somerset (4.64), Oxford (4.68), Waldo (4.72), Knox (4.78), Aroostook (4.8), Hancock (4.88).
The range in Maine runs from Piscataquis at 4.59 to Cumberland at 5.01; Franklin sits 24% of the way up.