Abstract: “The aim of this research is applying sigmoid growth model to determine the mung bean height growth pattern, in order to find out the important period during the plant growth. The data used was secondary data of mung bean plant with nitrogen fertilizer treatment. Data were collected for three months in a week interval. The analysis result showed that Richards model is suitable in describing the plant growth pattern, as the adjusted coefficient of determination is more than 99%. The Richards growth curve and the trend of the growth rate were also drawn. Analyzing the trend, it was found that the maximum growth rate happens at about five weeks after planting and at that time the plant height is about 33 cm. It means that the important period is at about or just before week five after planting.”

Keywords: Growth analysis, Mung bean, Richards model