10 X Yonger Self Watering Probes - Indoor Automatic Watering System Irrigation Equipment Houseplant Spikes for Plant This watering device is really automatic, and suitable for seeding and planting Just put one side of the tube in a vase or bowl of water, and the other in plant Don't let your plants get too thirsty According to the different degree of water, it is recommended to about 15 cm pots with a watering device, The diameter of each increase of 5 cm, can increase a watering device. One end of the plastic tube into the water container, and the white porcelain head is fully inserted into the soil.