Many people do not know that real cut flowers can be toxic. This can be because of the flower type itself or from the chemicals added to them while they are growing. Then there is the fact that the fresh cut flowers have to be inserted into the cake very carefully in such a manner as to make sure that no sap from the cut ends can leak into the cake. Purchasing your flowers from a reputable florist who assures you the flowers are not toxic and do not have pesticides is a must.
However, if food safe gum paste flowers can be hand crafted for you that look just as real as the natural flower why not choose those instead? Not only would there be no worries as to the toxicity of the flowers but you would have the added distinction of having sugar flowers on your cake. Now, that really makes the cake special. Not only that, but the flowers would be added to your cake by me, who knows best what your final cake vision should be. Your florist would not know that information. Let me make some of my handcrafted "sweet art" for you for your next special occasion cake!