I heard of an idea one time that is sort of like that. You use hemp rope (NOT nylon) and coil it around the outside of the pot then fill with dirt. Make sure to leave a length of rope hanging out the bottom of the pot. You put the the pot on anything that lets the rope hang down into a bucket of water (one of those plastic milk crates). As the plant uses water it will just suck up more from the bucket through the rope.