The hydroponics bay aboard the USS Cerritos
The "swamp" located below the hydoponics bay aboard the USS Cerritos
A hydroponic(s) bay, hydroponic(s) garden, hydroponic greenhouse, or hydroponic pod was the area of a starship, starbase, or planet devoted to hydroponics: the growing of plants in a non-soil medium. Due to their nature, it was not unheard of for them to create swamps in spaces beneath the floor.
The Y-class cargo freighter ECS Fortunate maintained a hydroponics section. (ENT: "Fortunate Son")
As a supplement to the protein resequencers, Enterprise NX-01 maintained a hydroponic greenhouse to provide fresh fruits and vegetables for the crew's mess hall. (ENT: "Breaking the Ice")
The USS Voyager did not have a hydroponics lab, but the variable environmental controls in cargo bay two could support hydroponics equipment. Shortly after Kes joined the crew in 2371, she volunteered to establish a hydroponics bay in cargo bay two in order to provide fresh fruits and vegetables. She used nitrogenated soil instead of an alternative for Voyager's hydroponics lab. (VOY: "Parallax")
Shortly after hydroponics bay was established aboard Voyager, in 2371, Neelix used some of the vegetables grown there for preparing food for the crew in the mess hall. (VOY: "Phage") Among the many things Kes planted in her hydroponics garden was bantan. (VOY: "The Cloud") This bay was later superseded by an airponics bay. (VOY: "Fury", "Elogium")
Deep Space 9 also had a hydroponic garden. (DS9: "Blaze of Glory") In 2375, Dukat and his Cult of the Pah-wraiths turned some of the lower levels of Empok Nor into hydroponic bays in order to grow food, as they could not activate the replicators. (DS9: "Covenant")
The USS Enterprise-E had a hydroponics section, an essential system, on Deck 11. (Star Trek: First Contact)
The USS Cerritos had a hydroponics bay, which created a swamp in the Jefferies tube junction below. Cultivation of a Tamarian defrin root was responsible for toxic levels of nitrous oxide within the junction, which caused Ensigns Brad Boimler and Beckett Mariner to hallucinate and forced Ensign D'Vana Tendi to forcibly guide them into the next Jefferies tube. Kayshon frequented the hydroponics bay. (LD: "Room for Growth")