This book comprises the study and comparative analysis of ecological parameters of the in vitro raised bacopa monnieri under standard condition and in vivo raised bacopa monnieri plants planted under same water and stress condition and same ecological parameter and studied for one whole year as this plant can not survive long under stress condition. the result of the study showed that the invitro raised plants were shown higher resistance to the water stress than the vegetatively propagated plants as the water is the most important stress factor now a days and become a critical ecological factor to the creeper plants who survive on the topmost soil water.