(EN) A plant system within a sidewalk or street planting application with the ability to collect, detain, retain or otherwise store incoming storm water in a subsurface chamber. The system is designed to make available this captured storm water for retrieval and dispersal as a form of supplemental irrigation to overlying plant systems as necessary. The system is also designed to encourage the collection and retention of rainwater, particularly in an arid environment, to provide continuous irrigation of vegetation. The system is further designed to maximize the amount of water available to vegetation in a primarily paved environment.