The revolutionary design of the Air-Pot wall actively enhances the growth of plants. Air pruning stimulates the development of a mass of healthy, fibrous roots. This maximizes the ability to absorb nutrient and water, meaning better health, and faster growth. View Larger Image Email This Item to a Friend Air-Pot PROP Cell Air-Pots have unusual cuspated walls, sort of an egg box configuration, made up of closed inward pointing cones and open ended outward pointing cones. There are no flat surfaces on the inside of the container to deflect roots and start the spiralling process. The inward pointing cones direct the roots further outward to the open ended cones where, because the air density in the soil is too great, the roots dehydrate and are effectively pruned. The plant responds to this "air-pruning" by sending out more roots to compensate for the loss which leads to a dense root system with a vast number of active white tipped roots. (Simple assembly required.)