I need to interview an expert for my science fair project im trying to find ways to make a rose last longer?

Here are a two ways I will try to make a rose last longer

1.) Carogenicly (freezing it and thawing it out a few days later)

2.) Hanging it upside down



PS: If you have any other ways you think might make a rose last longer please tell me thank you :]
I need to interview an expert for my science fair project im trying to find ways to make a rose last longer?
By adding aspirin to the water...
Reply:Talk to a florist.