A plant watering system comprises a reservoir, a plant growth container 1 located adjacent the reservoir, the reservoir having a water level in use below the container one or more channels communicating between the reservoir and container, a closing member for the or each channel movable between a lower open position and an upper closed position, wherein in the open position water in the reservoir may pass into the container to moisten a plant growth medium contained in the container and wherein, in the closed position the passage of water is prevented. The closing member may have an elongate support portion 12 arranged to support an elongate water absorbing member 19 such as a wick. The closing member may further comprise a generally horizontal cap 14, the cap having an upwardly facing surface upon which the wick rests
