Abstract: A storage tray for storing, watering and transporting plants, the storage tray being shaped like a pan, preferably with side walls, and having an overflow, which may be height-adjustable, for setting a desired liquid level, and a watering device for watering and transporting plants, with at least two storage trays of the invention disposed one on top of the other, the storage trays being arranged such that any liquid running over the overflow of a/each storage tray can flow into a storage tray located beneath it, and in particular the one immediately below.