A self-mulching planter bag that is tapered such that the diameter is larger at the top providing for easy removal of the bag from the root mass. It can be used for transplantation where a user can place a planter bag into a larger planter bag as the plant grows. The larger planter bag has space for the smaller bag through the use of a core feed plug which, when removed from the larger bag, leaves a void that is equal or greater to the size of the smaller bag. The larger bag can be pre-filled with designer soils especially suited for the particular plant. The planter bag also incorporates attachment points that can be used to train the plant or to attach the bags to surfaces or even to each other. Interconnected planter bag configurations can be used in a variety of applications including erosion control and environmental restoration.