First time working with fondant. After I make flowers, decoration, etc... how long do they stay good for?

Heres a pic of what I will be trying to accomplish. This is my first time practicing/using fondant. The bridal shower is in 3 weeks.


http://www.flickr.com/photos/lecupcake/1...

First time working with fondant. After I make flowers, decoration, etc... how long do they stay good for?
http://www.baking911.com/decorating/cake...





http://www.wrenscottage.com/kitchen/reci...





http://whatscookingamerica.net/PegW/Cove...