AHello!

I have to put some succulents on a cake, how to? Same as the flowers? So I need to wrap the roots and insert them into the cake? Advices please!

I would sure wash them well - they can have mealy bugs, which are disgusting and creepy. And who knows what else? Have no idea if they're otherwise safe. Have you considered making them from gumpaste?

A

They have been already purchased by the bride!

Right before displaying the cake I'd cut the roots off, wash the heck out of it, insert a wooden skewer into it and put a piece of fondant behind it so that it doesn't touch the cake.