noun
hydroponics; soilless culture
Refers to growing plants in a nutrient-rich water solution without soil. The term is neutral and used in agricultural, scientific, and hobby contexts.
水耕栽培でレタスを育てています。
I'm growing lettuce using hydroponics.
水耕栽培は土を使わ
Since hydroponics doesn't use soil, you can grow vegetables indoors.