The best way to water the string of dolphins is to give them a lot of water until it runs through the drainage holes at the bottom of the container. allow the soil to dry throughout watering. repeat this process once a week during the growing season. The watering schedule may have to change due to the conditions of each plant. A good rule of thumb is to allow the soil to dry 2 to 3 inches before re-watering. During the winter, allow your plant's soil to completely dry out during the dormant season.