Abstract: A hydroponic plant grow cabinet including a housing. The housing has a main plant growing chamber and a pre-growing chamber for seeds/seedlings, main tank and auxiliary tanks for a nutrient solution and pH level regulating solutions, pumps and tubing, a light source, a ventilator, a controller, sensors, a display, a loudspeaker, a user input, a network communication device, a connection to an electric main, and connections to water mains and sewage.

Abstract: Present invention relates to a locking and emptying system of a refill cartridge containing nutrients or chemicals, said system comprising at least one replaceable refill cartridge, at least one receiving socket for the refill cartridge, in every receiving socket a locking mechanism of the refill cartridge, discharge means of the refill cartridge and control means of the locking system and for each refill cartridge a emptying container. The control means of the locking system are set to release the empty refill cartridge from the receiving socket only when the emptying container has enough free volume to receive the content of the next refill cartridge.