An irrigation system for hanging plants in a hanging plant carousel system that includes a frame and a measuring assembly. The frame is fixedly coupled to a substantially stationary structure, such as the building or a portion of a truss system supporting the carousel system. The measuring assembly includes a movable arm, a sensor and a controller. The movable arm has a contact surface with a measuring start and end point, which extends into the path of the basket hook coupled to the cable of the carousel system. The movable arm is displaceable by at least one of the basket hook or a plant pot structure coupled thereto. The sensor coupled to the movable arm and is configured to provide data from which the weight of a plant pot structure can be determined. The controller is configured to control a watering system to provide water to the plant pot structure.
