US Patent 11337387 Hydroponic system and apparatus having removable growing structures for multiple types of plants

The disclosure relates to technology for hydroponics. An aspect includes a hydroponic system comprising a tray having a drain opening in a bottom of the tray. The hydroponic system comprises a water re-circulation system configured to re-circulate water containing plant nutrients through the hydroponic system. The water re-circulation system is configured to provide the water containing the plant nutrients to the tray. The tray is configured to convey the water along the bottom the tray to the drain opening, the drain opening configured to drain the water from the tray. The hydroponic system comprises different types of removable growing structures that are configured to provide corresponding different vertical distances between a top of a hydroponic growing medium and the bottom of the tray.