hello there im new to making cakes and have made a practise fondant cake and some lovely white fondant roses but stuck on how to attach them, please could somebody help, many thanks cheryl xxx

If they're just going on the top I would just use royal icing or glue made from 1/2 water 1/2 gumpaste. You can even use a little buttercream or just plain water.

I usually use melted white chocolate. HTH