I definitely let the customer work out the floral details with the florist, and I prefer that the florist put the flowers on the cake. I make sure the customer knows that the “food-safeness” of the flowers is up to the customer and florist to work out. But most of the time they are gone before I even arrive. I will put the flowers on the cake, but I charge a fee to do so. If you look at my cakes here, the one with all the roses took me an hour to cut and place all the roses.