Gardman Soil pH and Moisture Tester. To measure the pH, use a shovel to remove soil from a depth of about 5 cm (remove any stones and other debris). Moisten the soil (preferably with rainwater). Gently wipe the pH tester’s indicator with a cloth, then gently insert the pH tester’s indicator into the soil. Hold it there for 1 minute, then check the reading. Then remove the tester, clean it, and, if necessary, use it to take a reading at the next location. A pH range of 4–7 indicates acidic soil; 7–10 indicates alkaline soil.
Do not leave the tester in the soil for an extended period. Clean the indicator carefully after each use. To make the soil more alkaline, use garden lime or Algomin fertilizers. To make the soil more acidic, use acidic fertilizers or compost.
Color: green; materials: plastic and metal.