Proper pH provides microbes power to protect plants from pathogens. pH varies in different regions of the country. Soils in Northern Westchester generally have a high magnesium content. By adding dolomitic lime the magnesium content is pushed even higher. This in turn causes the chemical balance of the soil to be unbalanced. Most nurseries in the area only sell dolomitic lime because it is cheaper. We use only calcitic lime because soil tests indicate low levels of calcium and adequate magnesium levels. Grasses prefer a pH of 6.5-7.0 and when pH falls below 5.0 beneficial bacteria are no longer present.
Mushrooms and moss are indications of an acidic soil. Many plants, trees, and turf are unable to absorb soil nutrient because it is not readily available in the acidic soil.