A closed system used for indoor gardening that controls light, temperature, humidity, and airflow in a small footprint. They typically include built-in LED or HID lighting, exhaust fans, and reflective interiors to maximize light efficiency. Growers use them to start seeds, clone cuttings, or raise small crops year-round without a full greenhouse.
Heard on the job
I started the pepper seedlings in the grow box before moving them out to the high tunnel.