Does anyone know how long hydrangeas last out of water? I read somewhere that they only last about 2-3 hours?! I am wanting to make my own BM bouquets and use them from Sams Club, but I don't want them to wilt during the ceremony and pictures. If we make them and only use one big stem and then stuff it in styrofoam and wrap it in ribbon, I am not sure how to keep them hydrated then. Any suggestions?