Hope everyone is good.

Ok here is my question. I have a bride that wants one of those cherry blossom cakes. She want buttercream icing for the main cake and is ok with Fondant for the branches and flowers. I have never made buttercream with fondant accents. I have done a buttercream under a fully coverd cake in fondant though.(like normal). So how do I apply the fondant on the buttercream so that it will not fall off for both the branches and the flowers. I use Sugarshacks bc by the way. I think that I really don't have to do much of anything but I just don't know for sure. Or do I need to attach with extra bc?

And if I add this after my bc crusts does that make a difference?

thanks
Janice