1. A system for identifying healthiness of a plant, comprising: a mobile device having an image sensor for capturing an image of at least a part of a plant and a presentation unit; a database which stores a plurality of preset models; a processing unit adapted to perform an image processing analysis during which a visual representation of said at least part of a plant is extracted from said image, said visual representation is matched against at least one preset model of said plurality of preset models based on a visual similarity, and at least one plant disease is automatically identified based on said at least one preset model; and wherein said presentation unit presents, as an outcome of said image processing analysis, an indication of an absence or a presence of said at least one plant disease; wherein said visual similarity denotes a measure of resemblance between said visual representation and said at least one preset model.