Should I pipe BC or use fondant for the branches on a cherry blossom cake? Or should I paint it on?

Each medium will give a different look, so a lot depends on what look you're going for.

Here's one I did and the branches are just piped BC right on the cake (I put them on after I assembled the cake at the venue).

http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1460806

Hello I am doing a cherry blossom cake for a may wedding. I did a bridal mock up cake and did 2 sides in modeling chocolate and 2 sides in choc buttercream.. Look at my pictures and you will see both sides of the cake. I hope this gives you a good idea. The bride and groom did like the modeling chocolate better than the piped buttercream as the mc looks more authentic. Hope this helps!

Indydebi, may I ask what tip you used to pipe the branches (particularly the main branch). Was that a #5 or a flat tip?

Beautiful cake, btw!!

Thank you