The groom, groomsmen, fathers of both the bride and groom, the ring bearer, ushers, both sets of grandfathers, a male officiant, and any male readers should all wear one, pinned to the left lapel.
Placement Tips
A boutonniere is always pinned to the left lapel, stem pointing down. The pin should go through the back of the lapel first, then through the stem, and back through the lapel — keeping it secure without damaging the flower.
Choosing the Right Boutonniere
The boutonniere should complement — not match exactly — the bridal bouquet. A single stem with greenery is timeless and elegant.