To use, just fill the ceramic cone with water, put the cap on and push the cone into the soil. Then place the supply hose in a nearby container of water. It will now draw water into the pot as the plant needs it. As the water in the clay cone is drawn into the dry soil, it creates a vacuum that pulls more water in through the supply hose.
It's perfect for watering any indoor plant. (Outdoor plants can dry out too quickly and need a drip system to water them fast enough to prevent wilting.) Great for people who travel and want to make sure their plants are properly watered.
Large planters will need two waterers. 4" long with a 32" supply hose.