To find out when your post office is open: 1  Enter your location in Find a Post Office. 2  A map will appear displaying post offices near you. 3  Select Hours and Services. 4  Select your desired location to view the hours of operation.
Testing Soil pH with a Commercial Test Probe. 1  1. Dig a small hole in the soil. 2  2. Fill the hole with water. 3  3. Insert the test probe into the mud.  4. Hold it there for 60 seconds and take a reading. pH is usually measured on a scale of 1-14, though the tester may not include this entire range.
Soil pH. Soil testing, using a kit, helps determine the pH and nutrient qualities of the soil. Clematis requires a pH near 7.0. Sites with a lower pH are too acidic for best growth, but adding agricultural limestone to the site at least one month before planting can raise the pH sufficiently. The amount of required limestone is detailed on the soil test results.