Make A Flower Button Hole. Wrap each with some masking tape. Position them roughly how youll want them to sit as your boutonniere.
Layer the flat green leaf then the rosemary and then the rose on top. They have detailed the whole process on their blog with step by step instructions and photos. Use the florist tape to wrap the flowers together tightly.
Gerberas dont need this but they do need a little strengthening on order to be able to bend the flower head forward.
While you can make a buttonhole with the regular. Push the wire into the back of the gerbera head be gentle. Wrap each with some masking tape. Firstly push the wire horizontally through the base of the flower head.