Flowers on a wedding cake are simply wonderful, whether they are real or they are made from plastic or sugar. Whatever the client prefers and demands. Usually, the most used flowers to decorate a wedding cake are the roses, but some people prefer not to stick to the traditional patterns and they are looking for something new and exciting. That is why some people ask the confectioneries that make their wedding cakes to use calla lillies as decorative flowers. My first Calla Lillies wedding cake. They look so amazing.