I like the pin idea too, BUT I do it the ally clip way so the mom can wear the flower on her hat or her dds hair... and mix and match.. Plus I don't want to have to make flowers for hat and flowers for hair.. That is why I use the ally clips.
I don't think it matters. I do it vertically because it's not as noticable if anyone ever wants to wear their hats plain w/out a flower.
My dh wear a black hat and his friend are always teasing him asking him where his flower is.
I think the hat looks good on my dh! Has any of your dh's stole any of your hats to wear for themselves?