Professional florists make a boutonniere design special with attention to details. Adding more elements such as salal leaf also adds more wire stems and bulk at the bottom of the design.
Note that I only taped down part way on the boutonniere stems. I want the freesia stems exposed at the bottom so that they are part of the design.
I do not want the taped wire stems from the leaves, however, so I bent them outward from the bottom of the boutonniere and cut them close to the bottom of the florist tape.
Use a little more tape to make the binding smooth and assure that there are no raw edges of wire to snag material or scratch the wearer.