I have beautiful hydrangeas blooming in my backyard right now, so I thought I'd do a centerpiece trial.  These weren't fully in bloom (because I was impatient), and I'll be doing white or ivory for the wedding.  This is the vase I'll be using, and I added river rocks to see what they would look like in it.  Do you like the river rocks...maybe in darker shades of brown?  Should I add another flower or leave it simple?  What do you think?

Update:  These hydrangeas stayed pretty for OVER a week.  I didn't change the water or anything and they didn't even droop at all until about 10 days later.  And if I had cut the stems and changed the water, they probably would still be fine.  So, I have decided that I'm definitely doing hydrangeas, and I'll probably get some bear grass to add to them also.