I like to make boutonnieres "extra special" by adding a decorative wire accent. This mallable wire comes in a lot of different colors and gauges. You can use a very thin bullion wire that has a crinkled texture or choose the smoother thinner metallic wire option.
There are lots of choices for creating a lot of different looks, so explore your options before deciding!
I want to conceal the cut end of the wire and make sure it is firmly entrenched into the design. Slide it upward behind the heads of the mums.
Create a hairpin bend that can hook around the taped stems.
Simply continue winding the wire down the boutonniere stem.
I left room between the wraps in order to show the colored tape and add interest. You can also tightly wind the wire in coils that no stem shows.