DIY Boutonniere is really easy and what is great about it is that you can add special touches to give it more personal meaning. As with this one, the bride's name is Hazel, thus the hazel nut, which will be worn close to the groom's heart during the ceremony, aaawww...
Above are some of the boutonniere or buttonholes we made for Hazel autumn-rustic wedding. It is really easy to make as demonstrated on the step-by-step photos below. Although you will notice it is a bit different from the final product above, it is because I forgot to take pictures when we made them. Yeah, sometimes my excitement to see the final output gets the best of me that I tend to forget taking pictures of my projects that I plan to write about only when I am actually writing about it that I realized I do not have pictures to post! So for this one I have to make one again using leftover materials, but not bad I would say.
Materials:
floral wires 0.5mm
floral tape or masking tape
hemp string
cutting pliers or scissors
and any material you like to use for your boutonniere like flowers, leaves (brooches, feathers, buttons etc ..if the guys are in to it that is)..as for me I have to stick to the rustic autumn theme. 
Step 1: First is to extend the stems using floral wire. The stems should not be too long, about 2 inches should suffice.
Step 2: Bundle them together the way you want them to look. Cut excess stems if any.
Step 3: Wrap floral tape around the stems to cover the wires.
Step 4: Wrap the stem with hemp string to give it that rustic look.
What do you think?