I recently did a wedding cake with heavy roses as they each had over 30 petals. I used posy picks all the way down the cake, then piped in some royal icing, then placed in the roses that had a central wire. Wires cannot be places directly into a cake, as I’m sure you know, so that is why I use posy picks. They are very cheap to buy and come in all sizes
You must never limit your challenges, instead you must challenge your limits