noun, noun which may take the genitive case particle 'no'
Refers to growing plants without soil, using nutrient-rich water. Often used in compounds like 水耕栽培.
水耕栽培でレタスを育てている。
I'm growing lettuce using hydroponics.
水耕は土を使わないので、室内でも野菜が作れる。
Since hydroponics doesn't use soil, you can grow vegetables indoors.