Abstract: An automatic plant watering apparatus having a cavity for receiving a standard houseplant pot, a reservoir for holding water, a pump for removing water from the reservoir, a host for delivering water from the pump to a plant positioned in the cavity. The pump is operated by a microcontroller that is programmed to measure a first time period during which the pump is not operated, and a second time period during which the pump is operated. According, the apparatus can be programmed to automatically water a house plant at predetermined intervals, as well as deliver a predetermined amount of water.