CEA DEFINITIONS AND BIOLOGY

Understanding the Language of CEA

Glossary for CEA Terms

Explore Greenhub’s cross-disciplinary glossary of Controlled Environment Agriculture (CEA) — a growing knowledge base for greenhouse growers, indoor farm managers, researchers, breeders, and agtech innovators. Here you’ll find concise definitions of key vertical farming and plant science terms that help create a shared language across the CEA industry.

V

Vapor Pressure Deficit (VPD)

Difference between actual and saturated humidity; controls transpiration. 

Variety (Cultivar)

Distinct plant group within a species, selected for traits like growth speed, leaf size, disease...

Vegetative Stage

Period of leaf and stem growth. 

Vent Opening %

Position of roof or side vents. (Actuator Control Point)

Ventilation

Exchange of air through roof vents, side vents, or fans to control temperature,humidity, and CO₂...

Ventilation Windows

Roof or side vents that open/close to control airflow and temperature. 

Vertical Farm

Multi-layered growing inside buildings, typically with LEDs, usually without the use of daylight (= Indoor...

Vertical Towers

Upright columns where plants are stacked vertically, maximizing space efficiency. 

Vertical Walls

Plants grown on vertical surfaces, often with integrated irrigation. (=Living Walls, Green Walls)

Vigor / Growth Rate

Relative speed of plant growth; affects spacing, top lighting, DLI requirements, and fertigation schedules.  

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