How to use: As the soil dries, the ceramic cone delivers water gradually into the surrounding earth, creating a vacuum within the cone that draws water from a nearby container. Once the soil is sufficiently moistened, the watering stake will stop flowing. Note: Close the cap with the stake fully filled with water to allow proper vacuum formation.Useful tools: Self-watering probes provide a simple and effective way to water plants during vacations, business trips, or when regular watering is missed.Application: This 3-pack of watering stakes is compatible with most automatic garden watering systems. Ideal for seeding and planting, these stakes release water slowly into the pot as needed by the plants.Note: Measurements are taken manually; please allow a 1–3 cm variation. Due to differences in lighting and display settings, colors may vary slightly. Actual product may differ slightly from images shown.