It is a climbing cactus, so both sites are more or less correct. Around here they grow them on 2X4 supports, or against a block wall. They have air roots that will attach to the wall or a tree. Mine climbed the 10' block wall and went over it looking for sun. It was a bear to remove! I've never heard of anyone growing it from seed. They are usually grown from cuttings, and can get huge. In tropical regions they are grown for fruit.
