During Taipei international Flora Exposition, plants are housed in various types of pots. Despite being watered numerous times per day, plants often die from dehydration when they are placed in elevation. Thus this study explores specific water-conserving pot designs that enable plants to prosper without daily watering. This study combines DMAIC steps with Design of Experiment (DoE) methodology. Using DMAIC to create a clear definition, 5 different plant growth factors are then synthesized into a simplified factor to streamline DoE executions. Afterward, DMAIC applied to DoE results for further analysis, yielding water-conserving designs of pots, stands, and beds. These water-conserving infrastructures have been successfully deployed in gardens.