Probably a very silly question but can freeze dried flowers be placed in water?

I am getting married in September when my favourite flower Peony is out of season. I have located some freeze dried peony heads and was thinking I can use them as a table centre decoration in a fish bowl. Would this work, or would the head become saturated and sink?????????????

Probably a very silly question but can freeze dried flowers be placed in water?
Why not use a piece of oasis or a dry sponge and put a pin through the head to form a table decoration
Reply:The stalks would absorb water which would gradually be absorbed up the stems and eventually damage the flowers. They would make a lovely decorative piece if you fill the bowl with glass beads instead of water.