Product description:The SERAMIS® watering indicator shows you when your plants need water. It measures the moisture in soil or granules and you just have to remember to read it and water your plants - it's that easy To provide your plants with perfect care, we recommend our vital foods, which you can easily add to the irrigation water. Application:for: all potted plants in Seramis clay granulesProperties:The SERAMIS® watering indicator reliably indicates the watering time of plants in SERAMIS® plant granules. The watering indicator measures the moisture in the soil ball with the help of a special glass fibre paper. For pot sizes up to 16 cmInstructions for use:Insert the watering indicator into the root ball of the plant up to the bottom edge of the display fieldDo not remove or twist to read. Red = wateringBlue = do not waterImportant:After watering, the watering indicator only changes from "red" to "blue" after about 2 hoursWe recommend replacing the watering indicator after 12-18 months. Package size: 2 pieces