Growing your own Rosemary Topiary is a rewarding experience, watching it grow into the desired shape and then clipping and trimming to keep it as such. Rosemary branches can be shaped into wreaths by tying them onto a wire circle. Hang the wreath in a kitchen and pinch off bits as needed for cooking. The added bonus is the wonderful scent. Training and trimming a Rosemary plant into a topiary takes time but is rewarding to do.