Thanks for responding to my questions. I live in NW Iowa and we usually have adequate rainfall in the spring and fall with hot humid summers. Most of the conifers around here are one or two in people's yards. The 6.5 pH came from the bag of sulfur. The label mentioned 5.6 to 6.5 for golf course greens, tees, and fairways. I would be happy to achieve a 7.0 pH for my yard. I did a soil test according to the instructions from the Iowa State Soil Testing Laboratory. The extension office provided a plugging tool to take the samples in approximately twelve different areas in my yard. The results of the soil test are as follows. ppm P 36, ppm K 264, pH 7.6. I am trying to move the PH to a more grass friendly number.