A plant wall and module for growing plants is disclosed in which the plant wall and module provide for the controlled delivery of water and nutrients to plants located on the plant wall and module. The plant wall may include a matrix of modules, each module filled with an inert growing medium. The inert growing medium preferably includes openings in which plants are secured and from which plants can grow from the growing medium. An irrigation system delivers water and nutrients to each module and may be removed and replaced from the plant wall without removal of the irrigation system. In addition, a drainage channel, such as a rear drainage channel, is formed so that excess water may exit from the modules. Capillary breaks may also be provided within the growing medium of each module to aid in the distribution of water and nutrients throughout the growing medium.