<human>:  How can I build a self-watering garden?
<bot>: To build a self-watering garden, you'll need a water source, some containers to hold the soil and plants, a pump, drain tubing, and a timer. First, make sure that the water source is accessible. Then, place the containers and fill them with a potting mixture that can hold moisture without becoming waterlogged. Connect the drain tubing to the pump and lay it through the containers, allowing for drainage. Finally, set up the timer to disperse water at regular intervals.