Will they stick?
Do I have to wait until the buttercream crusts and then put a little bit of water on the flowers and then stick them to the cake?

Thank you for any advice you can give

Julie

If the flowers aren't heavy, you can use water to attach.

If they are heavy, you can use candy melts to attach.

At least that's what I use. I do it all the time.

I have. I Usually try to let the fondant decorations dry a little bit first, and I let the buttercream crust. I add to cake with a dab of buttercream

I'm always amazed at the holding power of a dab of buttercream. It should be all you need. If you're using heavy flowers on the side of the cake I would use toothpicks or possibly RI to attach.

Thanks all for you replies!
Julie

I just used a tiny dot of butter-cream to hold these on. They weren't very heavy, but didn't need any other support at all.
HTH

I use bc if the flowers will be placed at the bottom border. Anything higher and I use candy melts if they aren't lightweight.

OK-what's the trick to the flowers not softening and losing their shape? Every time I put gumpaste or fondant flowers on buttercream, they eventually get soft and lose their shape. Any tips for me?