These are my dogwood flowers. I got branches that were just budding (for the realistic texture) cut some petals out of white printing paper, glued them to the stems!!!
I used an egg carton box to secure the branches in my container. Another idea would be to use a clay type product to stick them in with.... or foam. :)
These are examples of branches I use... if you get them just when they are budding you will have branches that look really life like (as in still alive) and they will last you for a long time. Just don't cut them too late or the budding leaves will dry & fall off.
Simple but gorgeous!