Add a few layers of circular cut dry foam to an outdoor pot.
Cut off the stems of the pumpkins on two of the faux pumpkins.
Line up all of the pumpkins to determine where each will attach to each other. Use a spade bit to drill a hole in the bottom of each pumpkin.
Mark where the bottom hole in each pumpkin will line up with the top. Drill a hole in two of the tops of the pumpkins without stems.
Mark where the topiary will be placed in the pot. Apply a dot of hot glue and stick the dowel into the foam.
Thread mini string lights through a pumpkin. Place each pumpkin down onto the dowel, with the pumpkin with the stem on the very top.
Apply moss and decor around the areas where the pumpkins connect and around the base where the foam is using hot glue.