Allow the men’s flowers to flow with the theme of your wedding.
The groom’s boutonniere should be very similar to the brides bouquets, so all the pictures of the newlyweds coordinate. Likewise, the groom’s wedding party should match the bride’s wedding party and so on.
If you have your heart set on a water sensitive flower, like the lily of the valley pictured, plan for a back-up bout to switch to when the fragile flower starts to wilt. That said, it’s always a good idea to order an extra bout just in case. The “Hug Factor” (extreme amounts of hugging tend to crush said flowers) sometimes takes a toll, and an extra is handy to have around!