Buy rectangular vases, fake flowers, rocks, ribbon, and candles the width of the rectangle. Glue the flowers to the rocks and fill with water. Float the candle up top. Glue the ribbon around the top of the vase.
Stack and glue candle holders! Such a good idea. You can get the height seen in this topiary by stacking a few dollar store candle holders together. Glue them with a glass-appropriate glue (like spray paint black, and then place a flower ball on top.