Spirals are topiaries that can be formed out of Alberta spruce or more commonly, junipers. They tend to be placed on the corner of a house or on each side of a front door. These shrubs are added to enhance the appearance of a house. For most of the plants that they are formed from, it is important to put them in full sun. Again, with all topiaries, spirals need to be trimmed at least once each year.