Abstract: An apparatus for irrigating plants includes a planter having a container for a growing medium. A liquid reservoir is below the container. There are openings between the reservoir and the container, permitting a flow of liquid from the reservoir to the container. A filler conduit communicates with the reservoir. A float chamber is near the top of the reservoir. A float chamber conduit extends from the reservoir to the float chamber. There is a float in the float chamber and a normally closed air valve is operatively connected to the float so the float opens the valve when liquid from the reservoir rises in the float chamber. There may be an air conduit connected to the valve so pressurized air from the air conduit is discharged when the valve opens. There may be a closed liquid container normally positioned below the planter. A liquid conduit communicates with the insides of the container near the bottom thereof and is connected to the filler conduit.