ARIANA COLLECTION by Bloem: The planter waters plants when you are not looking and helps keep your plants from drying out. Here is how: Inside the planter, at the bottom, is a hidden reservoir that holds water. The self-watering insert keeps dirt and roots above the hidden reservoir line while constantly providing healthy greenhouse-like moisture through the evaporation process. If you are forgetful, or you are just not home very often, self-watering containers are a must-have. The soil has just the right amount of water all the time, but also maintains air pockets, which the plant roots need to stay healthy.