I say boutonniere in the title because I made it for my prom date, but this could easily be altered to make a corsage, or just any kind of decorative flower.
Also, I used sheet music (because it matches my dress quite well), but have fun with different colors and mediums =]
To start out, you'll need a bunch of kind of heart shaped pieces of paper. I used about 10.
Note: for the first, innermost petal, skip all the curling around the knitting needle and wrap it directly around the stem.
Curl the tips around a knitting needle
And wrap it lengthwise across the needle to form a valley
Wrap the petal around a floral tape wrapped wire stem, and secure it in place. I'm using duct tape in this photo, but floral tape and hot glue are good options too.
Ta-da! There you have it-- your one of a kind handmade rose =]