Leafy vegetables are most preferred for hydroponic production and lettuce is amongst the most dominating leafy vegetables worldwide. Ever since key chemical inputs like many soil disinfectants were banned, hydroponic lettuce production gained importance. There are mainly five systems that can be deployed for hydro-lettuce production i.e. Nutrient Film Technique, Floating Raft Technique, Vertical Tower Technique, Aeroponic Tower Technique and Grow Bag Technique. All the systems use nutrient solution for meeting mineral nutrition and water requirements. It is interesting to note that the most common type of lettuce i.e. Icebergs types are less commonly grown commercially under hydroponic system than other types of lettuce. The reasons are both commercial and technological as environmental requirements for tight head formation in the Iceberg types are more specific than other types of lettuce.