I’ve often thought with my dark hair that flowers would look lovely in it, especially since my hair is curly. But I am flower-challenged for I can never seem to make it stay in there and it always falls out.
Clips don’t work that well on my hair anyway, since my hair is very thin. Everything just falls out.
It probably wouldn’t work. If you’ve got a bouquet, the stems are probably longish, so you’d need to cut one down first, and then find some way to get it to stay there. Might depend on the type of hair the girl has; mine is very slippery and bobby pins and the like just fall out as soon as I start moving around (obviously YMMV on this).