A comprehensive survey of the sensory characteristics of shape, color, crispness, and sweetness of the fresh lettuce was conducted for marketable acceptability using a scale of 0–6, with 6 being the highest score, that is, 6 = like extremely, 3 = neither like nor dislike, 0 = dislike extremely. Random samples from different treatments were separately evaluated by 50 untrained consumer panelists, aged 20–64 year old, in the nutrition/sensory laboratory at the Agronomy Department, National Taiwan University.