Is there anything special I need to know before I try to put sugared fruit on top of a cake? A customer requested fruit on top of the cake . . . "Sure!" I said. 
My cake is iced in untinted Buttercream Dream icing (first time to use it - yummy!) with red buttercream poinsettias on the side. "Happy New Year" is written in red on top.
Tomorrow, I plan to put some raspberries, blueberries, and a few grapes on top.
Should I sugar them tonight and let them set? or should I wait until tomorrow to do it right before I put them on the cake? Will they stand up in the refrigerator - in other words, will the sugar stay visible on the fruit or will it "melt" into it? Do you use icing to attach the fruit to the cake?
TIA for any help!
I've never done this, but it is a good question. Inquiring minds want to know...
Anybody?
Theresa 
Thank you for the information. I did the fruit this morning (about an hour ago) and now we're off to church. Hopefully, since they're not picking it up until 4, I can put the fruit on later this afternoon and everything will be ok.
I hope it turns out ok!?!?
Thanks again for your help.
hopefully this isn't too late. I've only sugared apples, pears, and grapes, but I think you want to do berries right before putting on the cake b'c of the moisture. It will dissolve the sugar if done too far in advance. Sort of like powdered sugar on cake balls. You have to do it right before serving or it will be dissolved after a couple of hours. Hope this helps.
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