THANK YOU for all your comments and help with my flowers, I did clean them up a little bit and I'm excited to use them on my cake....but now I'm wondering:
What do I use to stick my flowers to the cake? Should I put a toothpick into the back of each one and slide it into the cake to help hold it? Some flowers will be on the side of the cake, others will be on top, if that makes a difference!

I normally use a little water to stick on buttercream. I know some people also use piping gel.

i use gum glue to attach my flowers. works every time.