An Ebb and Flow Tray, also known as a flood and drain tray, is an irrigation system designed to provide controlled irrigation to plants. Ebb and Flow trays have been used in greenhouses for many years. They consist of a flat, table-like structure with a surface where plants are placed, and are equipped with a network of drainage channels or grooves where water can flow.
These trays are designed with a network of drainage channels to serve specific purposes. During irrigation, the trays evenly distribute water that has been mixed with nutrients throughout the entire table, ensuring all plants receive adequate watering simultaneously. The water is then absorbed by the plants. After the irrigation cycle, the trays drain the remaining water evenly, preventing any plants from sitting in standing water. Before returning to the central reservoir, the water is filtered and treated so it can be reused for future irrigation cycles.