All you need are some wire, snips, and if it is a one-time use hat (that you don’t mind getting glue on) you can always use glue to help set your flowers in the perfect position.
Prep all your flowers and greenery. Pick out your fave blooms, clean off any unwanted leaves or petals that look less than stellar. Snip smaller, more manageable stems of greenery.
I think of it as making a greenery halo around the bridal flower hat, you can go as heavy or as light on the greenery as you’d like. I went fairly light on our hat.
If you want more detail on your bridal flower hat you can use other filler flowers or smaller leaves from your greenery to create more depth and composition.