Step 1: Position The Boutonniere In On The Left Lapel (remember to do the Ls)
The boutonniere should be placed on top of the lapel and on the left side. The boutonniere is typically placed lower than the tie, but above the pocket square.
Step 2: Lift The Lapel And insert The Pin Through The Thickest Part Of The Stem
Sticking it through the thickest part ensures the boutonniere is secure. Also, you want to angle the pin away from the chest
Step 3: Push The Pin Upwards At A Slight Angle And Back Through The Lapel.