I have a 2-layer sheet with BC and want to add very delicate gum paste carnations. Weather warming up here and I want the cake to last for tomorrow's grad party at school (and make the trip there). Can I put completed cake with the flowers in position in the fridge overnight?

I wouldn't put the flowers in the fridge.

Thanks! I'm guessing that. I guess I'm getting up early to assemble...

i think you will probably get answers both way on this topic
i have found that as long as my flowers are completely dry, they are fine to sit on my refridgerated bc cake. i once did an experiment and kept the gumpaste flower on bc in my fridge for two days and it did not suffer any. but again, it was totally dry. i also bring them to room temp in an a/c room.

i would prefer not to fridge them just to err on the side of caution, but sometimes i have too.

Nearly every cake I do has gumpaste pieces on it and I always refrigerate them overnight before delivering them. I've never had any problems whatsoever with them getting soft, bleeding, etc. I always cover the cake with plastic wrap. As long as they're completely dry and hard when you put them on the cake, they should be fine.